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Drive letter designation (C:) on my primary partition has been lost

Q: Drive letter designation (C:) on my primary partition has been lost

My system will not boot. It gets as far as the Windows XP logo with the 'busy bar' going back and forth, hangs for a while, and then reiterates the entire reboot process. Starting in Safe Mode reveals a hang at MUP.DLL.

The Windows XP Setup program does not recognize the partition as being NTFS formated (my 160GB hdd has two partitions, the second one is ok).

I booted Partition Magic from a bootable CD and discovered that the primary partition has no drive letter allocated to it.

How can I restore drive letter C without erasing the entire operating system?

Many tanks to everyone has a solution

Preferred Solution: Drive letter designation (C:) on my primary partition has been lost

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)

A: Drive letter designation (C:) on my primary partition has been lost

If you have the windows xp cd, boot from it and go into the recovery console. Go here ---> Recovery Console For more information. Once there in the recovery console type this command Fixboot "this Writes a new boot sector to a selected partition." then type Fixmbr this will Repair the Master Boot Record (MBR). Restart the computer.

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Ok i know this sounds stupid (hey, it's windows) but how do I end up with 7 primary partitions? I thought you could only have 4. Anyway, one of my partitions no longer has a drive letter so I can't access anything on it. I'm unable to right click it in disk Management to add one, the option is grayed out (see pic).

1st partition = 100MB win7 boot
2nd partition = the windows OS on it's own 50G partition
3rd partition = 50G FreeBSD Unix (this is a multi-boot system)
4th partition = 500G data partition, the one that lost it's drive letter D:.
5th, 6th, and 7th partitions are Linux partitions and the last one looks like an extended partition by the green outline.

I've used this system successfully since last year when win7 came out. It's worked pretty good but all of a sudden it lost the drive letter for the 500G data partition. I have no idea what happened or how to get it back. Any ideas?

A:Can't add drive letter to partition, have 7 primary partitions

Shot in the dark:

As you said, you can only have 4 Primary Partitions. I suspect that Windows knows this and is therefore saying "Well that can't be right" and assuming its made a mistake and won't let you assign drive letters.

If you get it down to 4 partitions again, it will probably let you assign letters.

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I am running a PC with a Windows 2000 upgrade on top of Windows 98. Have had the system for three years without major incident. The Primary partition C (NTFS 40meg) is used for the OS and programs and D (FAT32 120meg) for data. I also have an external HD for Back Ups and a Dell Inspirion 6400 laptop running XP.

I recently defragged my PC hard drive. When I rebooted I received the BSOD Stop: 0x0000007B screen and INACCESSIBLE_BOOT_DEVICE message

I rebooted using a Windows 98 boot diskette and was surprised to find that the Drive C: it saw was my former Drive D:, my former Primary Drive had seemingly disappeared. (Later I learned that DOS cannot see an NTFS partition.)

fdisk /SYSTEM command provided the following report:

Disk Drv Mbytes Free Usage
1 21553 100%
C: 47084

(The Drv C: that is reported is actually my original Drive D: which is the second partition on the Disk)

I then rebooted using a W2K SP4 Boot CD. It identified my Primary Drive C and the Windows 2000 installation and left me with a cursor at C:\WINNT

A simple CHKDSK reported
“ CHKDSK found one or more errors on the volume.
40965716 kilobytes total disk space
32070704 kilobytes are available

4096 bytes in each allocation unit
1024429 total allocation units on disk
8017676 allocation units available on disk”

After a CHKDSK /r the report was
“ CHKDSK found no errors on the volume
40965716 kilobytes total disk space
32800476 kilobytes available

4096 bytes in each allocation unit
1024429 total allocation... Read more

A:Lost Primary Drive Letter After Defrag

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So I inadvertently stumbled onto the disk management program, whilst looking for disk cleanup... and was a little confused to find a 25gb primary partition which was totally unassigned. It won't let me do anything to it other than delete it. So I guess the question I'm asking is, can I delete this partition and assign the 25gb to another drive... or, is this important? I've heard manufacturers often include an inaccessible recovery partition... but 25gb is space I could use...

I've included a screenshot in case my description was a bit rubbish.


A:Disk Management - 25gb primary partition, unallocated drive letter.

Welcome to the forum,

Can you post a better screenshot with everything in view,

Disk Management - Post a Screen Capture Image

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After deleting a RAID 1 setup, I proceeded to change the partition drive letters with disc management...in the attempt to move the C designation to the system partition, it was "lost" once I removed it from another partition.
Now what? The system cannot see a hard drive during authentication - and can't reinstall the operating system since it can't find a hard drive!

Even though this was a naive/ignorant blunder, it must happen enough that someone's got a remedy - I hope.
Any sites to direct me? Help! (Thanks!!)

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I have a friend's laptop running W7 64bit. It was essentially unusable simply getting a blinking cursor on boot. I've run some diagnostic etc but gotten the no OS found message.
On further repair attempts found what I believe to be the issue. The drive letter designations are all messed up. It is trying to boot from C: but C: is the "system reserved" drive. The real C: has a drive letter designation of D:
I believe the fix is to change the drive letters back to the correct drive.. How can I do that from outside Windows?
Any thoughts?
Thanks for any help

A:How to change drive letter designation outside Windows 7

This is a symptom that the partition table is damaged and the direct approach (ie trying to change drive letters) is not the right way to fix this. you need a tool to fix the partition table.

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I have a hard drive connected to a USB port. Yesterday, the drive letter of this USB drive was D. Front Page accessed this drive as drive D without any problems. Perhaps because I have a faulty DVD/RW drive, somehow the drive designation of the USB drive was changed to F. Since the USB drive designation changed, Front Page now will not/cannot access drive F. I tried to change the drive designation of the USB drive back to D in Disk Management but Disk Management would not let me rename the USB drive to any letter before F. How do I change the drive designation of the USB drive back to D. Thank you in advance for your help and replies.

(Windows runs on Drive C)

A:Solved: Need To Change Drive Letter Designation

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I have just replaced a SATA hard drive that crashed. I booted with the original XP Pro cd and installed . Somehow, the setup named the hd with letter "I" I want to change it back to C. I don't remember it ever asking me what letter to use. Is there a way to change it without reloading XP? I went to disk management, but it wouldn't let me change it because it is the boot drive. Thanks>

A:Solved: Changing Hard Drive Letter Designation ???

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I have a wierd problem that most of the suggestions seem not to work.
I have a HP computer with Vista basic installed at factory with no disc sent with computer. I then added an external drive on which I installed Ubuntu OS as the primary boot drive. This was needed while I was learning and using Asterisk. Now I do not need the drive which no longer seems to have a letter designation or Ubuntu OS but cannot seem to be able to use System Recovery. Near as I can tell, I need to reset the Master Boot Record back to Vista only but seem unable to do so as I recieved no disks with the Computer.
Any suggestions. I am not extremely skilled at computer technical stuff so please assume I am an idiot if responding.

A:Removing External drive with Ubuntu OS but no drive letter designation


Look here for one un-install option: -

How To Safely Uninstall Ubuntu From A Windows Dual-Boot PC

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I switch on my computer typically as every morning. This time I lost my extended WD Passport 80 MB. No letter drive.

I check in Device Manager. Disk is recognize, but shows
Type - Unknown
Status - Unreadable
Partition Style - Not Applicable
Capacity - 0 MB
Unallocated Space - 0 MB
Reserved Space - 0 MB

Looks like a Master Boot Records gone. Addictionaly it shows me FAT 12 .

I have no idea what's happened.

When drive starts make it sounds like a "turn few times". I didn't hear it before. Is it mechanically corrupted, or just lost partitions ?

A:WD Passport 80GB lost drive letter, partition, 0MB

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I have a Dell with a micro card reader built in. It can read four different types of cards and they are labeled H:\, I:\, J:\, and K:\. If I put a card into the reader, that specific drive (i.e. K:\) shows up in Disk Manager and I can change the letter
designation. The problem that I'm having is the other three slots won't show up in Disk Manager unless I insert a card. I don't have the other types of cards and don't want to buy them. Is there a way to change the drive letter designation of the card readers
without having a card inserted in them? Thanks,

A:Change drive letter designation on internal SD card reader.

I found the solution: Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices Right-click "\DosDevices\D:", and then click Rename Rename it to \DosDevices\S: - or whatever letter you want.

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I am using Vista Home Premium. I have 340GB HD, which is partitioned into 3 parts. One is C. Second one was D. I had dual boot enabled, with OpenSuSE running in it, which I removed yesterday. All was fine and I was able to boot just with Windows without Grub boot loader. In Disk management application, I could see the partition - where SuSE was there earlier, as Free Space.

C drive is 64.5GB, D drive is 97.7GB. Both are NTFS. and Free space is 173 GB.

So far so good. Then instead of trying to create a new Drive/partition in the 173 GB Free space, I tried to extend the existing D Drive using PartitionMagic and somewhere in the process, I lost my D Drive I can no longer see D Drive in my Explorer (

Currently, I can still see old D drive as a partition, in blue color in Disk management software, indicating that it is a Primary partition. But I am not able to assign any Drive letter to it. Diska Management app does not show me the properties for this partition. I get this error "Operation failed to complete because the Disk management console view is not up-to-date. Refresh the view by using refresh task. If the problem persists close the Disk Manage,ent console, and then restart Disk Management or restart computer".

Restarting did not help.

Third party tools, like Active UnEraser etc are able to detect this partition as NTFS and also able to find all the files in this. So I am assuming by data is in there still.

Something gone bad with Partition Table or Volume... Read more

A:NTFS partition drive letter lost. Unable to assign

Hi Sekhar, It sounds as if it doesn't matter about the files on D:\ now if I understand you correctly- that was where you had Suse installed. It also seems you can still boot and run Vista.

So it seems that you just need to clean up the partition table.

You can try this free tool (recommended) - which supports partition table recovery-
Magic Server Partition Manager Software - Resize partition for Windows Server 2003, 2008 and 2000.
- bootable CD here
Partition Wizard Bootable CD allows user to boot computer directly to manage partition.
or Easeus partition master (home)
Best FREE Partition Manager Freeware for Windows 2000/XP/Vista/Windows 7. EASEUS free Partition Manager Software Home Edition.
- no bootable disk with free edition

In the past I've found [email protected] Partition Recovery useful in difficult circumstances.

Good luck. dal987

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After researching my issue and found this closed thread - "Windows 7 won't read drive in explorer" I started my own little research to my problem.

First some basics: I am running Windows Ultimate 32 bit. I have 2 SATA Hard Drives (one with OS), 2 SATA DVD and Blu-Ray Drives and 1 IDE Hard Drive which is configured as a slave.

Second - I needed to do some hard drive trouble shooting for another computer that had a (possibly) dead IDE Hard Drive. To do this I shut down my computer, and attached the (supposedly) dead IDE Hard Drive in its place.

Now - all the trouble began.

After booting into the Bios, I noticed the supposedly dead hard drive did not register even though it was spinning. I kept booting into the OS to see if it would be recognized in any case - it was not.

I put my working IDE Hard Drive back in - after shutting down and removing the dead IDE Hard Drive.

I booted back into the BIOS and noticed my good IDE Hard Drive wasn't being recognized either. I then went into advanced Bios settings and walla - it saw my hard drive but said I needed to reboot.

After rebooting I noticed the same thing with the Bios, but this time proceeded to boot into the OS.

After signing on, I noticed my Good Hard Drive was no longer recognized in Explorer.

I went into Administrator and Computer Management and then into Disk Management.

What I saw puzzled me as over the past 25 years I never have seen this. My good hard drive was showing up as Disk 0 and showe... Read more

A:lost my drive letter on Healthy (Active, Recovery Partition)

Go into control panel and change windows update settings
to something other than automatic,like download and notify.
That way you have a choice what to install.
Then run windows update manually.
Check the list of updates for a drive controller driver.
It sounds like it is installing one that isn't working for you.
It would probably be under optional updates.
You should be able to select hide update an click ok
so it won't try to install it anymore.

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I was installing a new WD drive; and the "Found New Hardware" pops up every time I reboot. The "Found New Hardware" also seems to pop up every time I do disk management either with WinXP's Disk Manager or Partition Magic. I was changing drive letters when the dialogbox pops up; and XP crashed. Now I can boot up. And I find that the "C:" is assigned to a logical partition that has no windows on it.

There is no problem with the Windows partition per se. Is there any way I can get that "C:" assigned back to the Windows partition?

Or may be my not able to boot has nothing to do with te lost of C: designation. I also have Win98 on this HD. I used Partition Magic to set Win98 to Active; and it boots into Win98.

Can anyone guess what the problem is? And how to solve it without a reinstall?


A:My C: Drive lost its designation

I think I spoke too soon. When I look at the Partition Magic after I boot up in Win98, that drive is designated as C: So, it appears that that is the reason for my not able to boot up in WinXP. Anyway, any possible solutions?


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I have a question.

I formatted a partition of my harddrive but in the end not only a partition was formatted but the next partition also was gone.

Meaning: the data is still there, but the NTFS partition isn't recognised anymore by Windows, and in diskmanager the space is now ready to assign new partition.

In a data recovery software, I saw the not recognised partition was still recognised as 'NTFS'.

What can I do?

The best scenario would be to simply tell Windows somehow, there is partition with NTFS and it should assign a letter to it.

A:Windows lost partition letter and don't recognize format partition

Can you post a screen shot of Disk management?

Screenshot tools.
A Preferred Method of Uploading/Posting Screen Shots
How to Use the Snipping Tool in Vista - Vista Forums
Snipping Tool - Windows 7 features - Microsoft Windows
Use Snipping Tool to capture screen shots
Screenshot with Paint
Screenshot and Upload using MWSnap
fscapture free download

Use Snipping Tool to capture screen shots

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I want to rename drive E (10gigs) to lets say drive S...is it as simple as right clicking and renaming the drive in most cases right?. This is a one owner non networked home pc. (windows xp)



A:Solved: renaming extended partition drive letter to another letter...plz help

Right click on My Computer . . select Manage . . then Disk Management . .

In Disk Management, right click on the Drive an select change letter assignment . .

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Hi Everyone,

I was trying to extend a partition since on an old Windows drive which was upgraded to a new drive. On the old drive, there was 50GB unused on another partition. I deleted the 50GB and then tried to extend the main primary partition. I found out that it deleted a user directory under that drive. Is there any way to recover it? I am surprised that it did this since in Linux on a LVM this is a pretty safe procedure.

I also tried OO Unerase and it didn't even show the directory.


A:Extended partition and lost files on primary partition

Could you please Provide a screenshot of your Drive Map

See Screenshots and Files - Upload and Post in Seven Forums For More Information


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Hello everyone!

I recently got in to some trouble using my good old computer running Windows XP.

When i installed it i decided to make two partition out of my HDD, one larger for programs/documents and such and one smaller, intended only for the OS. The idea was that should i for some reason need to reformat and reinstall XP, i would not lose valuable documents and photos doing so.

Well, my computer had been quite slow for a while, the symptom being that processor was very often working at , or close to 100 %. After trying a couple of things i realized that my partition intended for the OS was a little small and that, removing anything not needed, i only had 150 MB or so of free space.

I then came across programs such as Paragon Partition and Easeus Partition Master. Unfortunately, both attempts ended in a computer freeze and the computer, at least in windows, losing my larger partition. C: was no longer to be found, causing for instance all my programs to be unable to start, since they were installed on C:.

I then used a program called Testdisk to try to get hold of my original partition and remove and corrupt duplicate ones. This is where things got messy. I believe that i somehow managed to change the primary boot partition, causing a readdisk error.

What was originally a search for some extra partition size has now made me unable to use the computer at all!

I have so far tried some different things.
I have started with the XP CD in, only to realize ... Read more

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I have several external USB HDs used as a backup or to store overflow files. I want to change the letter designation from the defaults which are (E: ) in most cases, to (D: ), (F: ) etc. (Simply using the "Rename" command which is normally used to rename files or folders changes its title or whatever it is called but not the letter designation.)

How can I change its letter designation please?

A:Rename Ext. HD Letter Designation

Right click on Computer and select Manage. Go to Disk Management.

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Hallo - was wondering if anyone could help..

When my computer died earlier this year I had to get a new hard drive to replace my broken c drive. When I reinstalled windows xp, my new primary drive was automatically assigned drive letter 'F' and I didn;t bother to change it. Now I want to change it to'c'.

I know that to re assign the primary drive letter , i cannot change using computer management in control panel - I know that i need to go into the registry and change it. My question is, will my computer will have problems booting after i reassign the drive letter to 'C'? Or do I have to start again with reinstalling windows?

A:Reassigning primary drive letter

No can do! While people will occasionally come up with procedures to do a massive registry edit and change the boot drive letter, the easiest and quickest way is to re-install Windows. It's also the way that won't blow up in your face when you miss a bunch of things trying to tinker with the registry.

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When instaled Partition magic 8 on windows 7 when i started it program something Fixed

And later disperd my data partition like showed in picture above.

Can someone help me? maybe can some one give me link that program will fix this?

A:Lost partition letter and can't add it

You could try using DiskPart.

Click Start and type in "diskpart" if you have Windows Search enabled.

Right click the program and select Run as Administrator.

After this has loaded type in "listvolume" and hit Enter.

When you see the Partition you want to format, look at the number it has assigned for that partition.

Type "select volume 5", replace "5" with whatever number it gave you.

Finally, type select "assign letter J", replacing J with whatever letter you chose.


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Hi everyone,
I have a 500GB HDD divided in to 55.5GB Primary boot partition (C: ) with Win7 and Programs and remaining space ~410GB partitioned (D: ) is where my data is stored.
Somehow my kid touched something, somewhat... and my PC won't boot. When I boot Linux from my USB dongle i see that partition C: has unknown file system, Used/Unused space unknown and it is not mounted. The other partition has the data intact and it is accessible.

I still have some documents on My Documents (C: ) that I need to retrieve. Is there any way to fix this partition so I can retrieve this data on lost partition without risking the remaining data on the other, healthy partition.

Thank you in advance!

A:Primary Partition lost


Since you are familiar with Linux, use the Peppermint 3 Linux distribution to copy those files to another external hard drive. Use this simple tutorial to guide you:



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This happens (accidentally) sometimes when loading an XP computer. If you happen to have a zip drive or memory card reader plugged in, then during setup XP automatically makes the primary hard drive, a letter AFTER those!

So in other words, if they have a zip drive and a couple CD-ROMs, XP loads up as drive E: or some such. I've got a PC now with a memory card reader and the main drive loaded as drive I:!
I really dislike that. XP should always use C: for the hard drive. But anyway, without having to reload the whole dang PC over again and unplug those devices, can I just use a program to change the drive letter and make all needed changes? Or is it better to reload to get my letter to be C:?

I know Partition Magic has a drive letter changing utility that you can use when you merge partitions and such. But I'm not sure if any utility can change the system partition drive letter.
I really don't feel like reloading this monster of a machine again.


P.S. And free is always good, if such a utility exists

A:Need a program to change primary drive letter

Is it faur to assume that the computer managment disk management snap-in can't do this?

I don't know about a utility for this, but the following page may help, or not perhaps... http://www.petri.co.il/change_system_drive_letter_in_windows_xp.htm

I say it may not help, because icrosoft say this about changing the system drive letter...

Failing all of the above, would the fixboot, bootcfg, or fixmbr commands from the recovery console allow you to fix it?

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I recently installed a new SSD, and put windows 7 ultimate x64 on it. this installation occurred while another instance of windows was on a separate HDD that was still installed in the computer. because of the existing install, my primary drive letter was set to D:, i have since scrubbed the old HHD and the windows installation on it. When i attempted to change my primary system drive letter from D: to C:, i got the error "The Parameter is Incorrect". Does anyone know of a way to force windows to change this?

I attempted this change through windows disk management.

*I have already backed up all information, and took a snapshot of the drive in case of catastrophic failure.

Thank you in advance for any assistance given.

A:Error while changing primary drive letter

You can't change the letter of the system drive, IE the drive Windows is installed on.

Your first mistake was leaving the other drive connected when you install the OS on the SSD.

If I were you I would start over with a Clean/Fresh install on the SSD. That is after you backup any data that may be on that drive and also have all other drives disconnected before you start the install on the SSD.

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I'm putting this in the Win2000 forum because that is where I was when this damage took place.

I've lost my primary partition (Drive C) on my primary hard disk. I was copying files from a secondary disk to the primary disk when it suddenly did a spontaneous boot. After POSTing, it would go no further. I have three partitions on the 238-Gig drive, C (primary), D (logical drive in the extended) and E (another logical drive in the extended).

Active Partition Recovery, which is sometimes some help, is no help and shows the C partition at zero size and only scrambled non-keyboard characters for directory and file names. The D and E drives are still readable from a Windows 98 boot disk; but, when the drive is connected to another machine as a secondary so I can recover files from D & E on either the IDE0 or IDE1 cable, I get a BSOD when I try to boot Windows 2000.

If I could recover the partition information, my troubles would be over. Any suggestions?

By the way, I'm running FAT32.

A:Suddenly Lost Primary (OS) Partition

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I have Windows 7 installed on an SSD 128 GB drive but I'm upgrading the drive to an SSD 256 GB. But at the same time I want to keep the newly installed drive letter as C: like the old one so I can use "C: only" software.

My present hard drives are:

Primary Windows 7 128GB SSD - labeled C:
ASUS DVD Optical - labeled D:
WD 1TB Internal Storage - labeled E:
Seagate 800GB External Storage - labeled F:

When I tried to reboot with the new drive plugged in, Windows 7 recognized the system image from my internal storage E: drive but in the System Recovery Options menu, the storage's letter suddenly changed to C:...

How do I keep the NEW 256GB installed drive as C:? Is it possible to change the primary drive letter in Windows 7 Disk Management back to C: after a primary SSD drive switch and system image recovery?

A:Want to change Primary SSD drive but keep Drive letter at C:

Robinsongs, welcome to the windows 7 forum.

If you install the new ssd in your d slot after restoring your image to the SSD, your bios will normally allow you to
select the boot drive. which you can select as the new SSD.

I would remove the old C drive and place the new ssd in the old C slot. Should be ok.

This way when you boot your machine the bios should automatically boot from your new ssd.
If you have restored your old c image to the new ssd properly.

Bios normally allows you to select boot devices.


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I'm not too sure what to do as of now, the free partition that is worth 66gb is just there. I right clicked my Primary Cdrive partition to try extend it but it was greyed out and so i couldnt merge the two..

Help is greatly appreciated!

A:How do i Merge a free space partition to my Primary C drive partition? IN VISTA

You can't modify the partition that has Windows installed on it because doing so would destroy your Windows installation.

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I loaded a hard disk formatted as a Windows Primary Disk onto my SATA controller. The BIOS sees the disk. In this case I want to load the new disk as a secondary drive (of course I have booted with a different hard disk). I load the Partition Manager and inside I find that the partition manger does not see the new disk. I am wondering if this has anything to do with the new disk being a Windows 7 primary boot partition as well. I was hoping to get a drive letter mapped to it so I could extract some data from that disk. What should I be doing when this occurs?

Thank you...

A:Partition Manager. Primary Boot Partition as Secondary Drive.

Have you tried Disk Management? Right click computer and select manage, in the left column select disk management. In the lower portion of the window you will see each hard drive with drive letters. If you see one with no drive letter, right click it and select 'change drive letter or path, next screen select add, and pick whatever drive letter you would like from the drop down list. Once it gives it a drive letter, you will be able to see it in explorer. If you have data on the drive you would like to keep, Do Not format it, if Disk Management wants to.

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Good day, afternoon, night.
As the title explains I was trying to create a new primary partition in my Hard Disk Samsung HM500JI that I use as External Disk with an Acteck Enclosure USB 2.0 and with DISKPART I selected the Small Partition recently created and used the command "clean" (thinking that, that command would clean the partition and not the entire disk , and then I used "create partition primary" until I got advised that the entire disk was cleaned.

I found this thread and I think it could help me a lot with my problem but due all the programs are very powerful tools I don't want to delete my data

I had not put anything on the disk I just ran the Quick Scan and Deeper Scan from TestDisk with no lucky of recovery (I didn't take any SS of those scans). Now finished the Quick Scan of Partition Recovery in Partition Wizard with no lucky of any useful partition, just the last partition I did.

I will do the full scan of Partition Wizard and I will put the SS here.

It was only "Clean" command and "Create Partition Primary". Not "Clean All", so If the PW doesn't works I think the only tool that could help me is DMDE.

Recover data from a diskpart > clean command

And this ^ thread contains a lot of info from I take recently and I haven't made any other modify in the Hard disk since the DiskPart.
Hope all the info helps to help me and sorry about my English I'm from Mexico.

I finished the Full Scan and as the ... Read more

A:HDD Data lost, Diskpart Clean and Create Partition Primary Commands

Hi alexalget,

I am still trying to reconstruct what you have done leading to this problem. Please answer each question point by point for my understanding.

1. You had put a 500GB HDD into an external casing. When you put it in the very first time, was that HDD a new one or it already had data in it?

2.Have you been using this setup, reading and writing into the drive since the time you put that 500GB drive in it, without changing the disk structure? In other words did you wipe / format it and started with a clean 500GB HDD inside?

3. If you were already using the drive, you will not be able to create a new volume unless you delete the existing volume. Did you delete the existing volume, before you created a new small volume of 8 GB?

4. Did you use Windows Disk Management to create this new 8GB volume?

5. Also post a screenshot of how your drive looks now in Windows Disk Management as well as Partition Wizard -the very first screen that appears when you launch PW.

( I know you had read the other thread by lonewolf, where Anshad Edavana had done an excellent work reconstructing the MBR, partition table and the NTFS boot sector. But your case is different - you seem to have done multiple operations rather than just a diskpart clean as in that case - and I am not sure whether you should follow that.)

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I have just installed two new internal HDs.

In Computer Management, one is listed as Page File, Primary Partition. The other as simply Primary Partition, though I'm pretty sure I did exactly the same installation procedure for both.

What's the difference? Should they both be the same? If so, which and what should I do to make the odd one right? Also, the Page File, Primary Partition drive is slightly smaller, for some reason.



A:(Page File, Primary Partition) and (Primary Partition) - Difference?

From Wikipedia
A primary partition contains one file system. In DOS and earlier versions of Microsoft Windows systems, the system partition was required to be the first partition. Windows operating systems must be located in a primary partition. Other operating systems do not have this peculiar requirement. However, other factors, such as a PC's BIOS (see Boot sequence on standard PC) may also impart specific requirements as to which partition must contain the primary OS.

This one may load slow
Change the size of virtual memory (Page file size) in Vista | Windows Reference

The paging file is actually the virtual memory that is stored in the OS.
In the case of your question it is a hidden primary pattiion.

It not necessary, but if you want to try and see it
Hidden Files and Folders - Show or Hide - Windows 7 Forums

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Have just installed a new 8.7 Maxtor in a P100. This drive is set as master and partitioned into 5 which assigns drive letters c,d,e,f,g . If I re-install the old 500mb drive unit as a slave ( Quantum Maverick) it assigns itself as drive letter D. I want this drive to show up as drive H . If I go to Device manager, hard drives, double click on generic ide type 47, settings, for this drive the drive letter assignment is there, but I cannot change it. Any ideas please.

A:{SOLVED} Slave drive letter inserts itself within master partition drive letters

I don't think you can change it. Normally the bios will take the primary of the 1st ide drive as c, the primary of the second ide as d, the next partition of the primary ide drive as e, etc.

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My sister did something to her computer and reinstalled Windows XP. The thing is that it is installed on a partition (labeled "e") with only 3 gigs. I noticed this because I tried installing more software and it said that there wasn't enough space on the hard drive.

I searched online and found that I could see both partitions using the disk management utility. When I use this utility, I can see the partition labeled "e" and the other larger partition (75 gigs) and it doesn't have a drive letter. I have tried adding a letter to it by right-clicking, and all that it shows in the menu is "delete" and "help". Both partitions are labeled as "healthy".

How do I get back to that partition? Are all the programs, drivers, files, etc. still on that partition? How can I get the computer to start up on that partition? Windows XP is now installed on the smaller partition - should it be removed eventually?


A:Partition without a drive letter

The little partition was most likely the "System Recovery" partition that came with the already installed software setup when she bought the PC.

Somehow she has clobbered (a techie term ) the main partition that contained her data and Windows installation.

If she has a set of System Restore Disks (CD's), then she may be able to use them to restore the HD to its original state...like the day she bought the PC.

If not, and it were my PC, I would use FDISK to remove everything from the HD, and then recreate a single partition of maximum size on the drive. Next Format it, and then reinstall Windows...going on from there.

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I have an anternal media drive whith a number of hidden partitions which do not show up in windows. One of these partitions had become corrupted and unuseable and I would like to try re formatting it to fix the error.

In Partition Magic there are a number of drives listed. Some of the drives on the partition have assigned drive letters but the one I want to format has is greyed out and listed with a * infront of it. Partition Magic will let me enter the drive to view details and even gives me the option to format it BUT then wants to assign the drive the letter A:

If I do this then the media drive will be unable to work as it will have lost the file path it needs to record on to. I just wnat to re format this drive (with whatever freeware) and have the drive letter (wich is currently unassigned) untouched so that the media player never knows its been formatted.

File system is FAT32, partition size is 10gb, using Partition Magic, there are 2 partitions with assigned drive letters and 3 without on the 1gb HDD.

Any help or suggestions appreciated thanks.

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I have a new Laptop with Windows 7 Home edition (factory installed). It has only primary C: partition.

Is there any tweak to partition the HDD directly using windows without re-formatting the HDD

A:How to Partition Primary Drive

Hello Venths,

What in particular are you wanting to change?

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Windows 2000. The drive letter (F on my 60 gig drive disapeared. The drive is blind to the system and all is unaccesable. Setup and Partition magic shows the drive to be there and operating. Can the drive be rescued?

A:Lost drive letter

If you do not have TweakUI go HERE and get it. Once you install it you will find a number of useful features. Among these are the ability to hide individual drives (under the "My Computer" tab). This option may have been set by some other method. See if TweakUI will let you un-set it.

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as of turning on my laptop today the drive letter previously (H:) has gone. It is an iomega 1 TB external hard drive. i have Sony Vaio Lap top, I also have an Acer both work but neither will recognise the drive,That is to say they will not show (H:) i have nothing else connected to the pc,at the moment bcz i have disconnecter everything to get back to basic setup. Both pcs know the drive is there when i connect it,divice manager tell me i have it there,Speccy tells me it is there,it even tells me the capacity and that it is actually a samsung HD103si usb divice,but i cannot open the drive bcs the drive letter is gone,there is nothing to click on(C:) is there and any number of flash drives i care to plug in are recognised and assigned a drive letter imediatly,but not the external hard drive. I formatted it bcz it was getting too full of junk so i moved the stuff i wanted to the sony formatted the iomega,normal NTFC format restore defaults etc but it seem like the pc got carried away &removed even the drive letter, what can i do to reclaim it ?

A:Lost drive letter (H:)

Go to drive management and.........
Try initializing the drive or adding the drive letter.

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I have Windows 7 RC on my Computer. It is on Drive C:

I got this Vista Recovry disk that came with the laptop, and I was going to use it to dual boot Vist with the Windows 7. The Recovery disk will ONLY install onto drive C, there is NO OTHER intallation options.

The Question: If I change the Drive letter of my Windows 7 Drive to Drive D: and then change the Empty partition to C: will my Windows 7 still be bootable? Even if I chagne the boot loader option of Windows 7 to drive D: ?

A:Change Drive letter: Partition containing OS

I have never been able to change an OS to another letter without bricking the OS. The only tutorials for doing so make it clear it is only if the OS letter has slipped.

What I would do is save externally a backup image of Win7 using an imaging software that will allow you to select where to reimage, such as Paragon Backup & Recovery Free Edition - Free Download or Macrium Reflect.

Then go ahead and do the Vista factory restore, shrink Vista partition in Disk Management, reimage Win7 to the shrunken space. Now boot the Win7 DVD Repair console to run Startup Repair up to 3 separate times to rewrite the MBR to Win7 and possibly configure the dual boot. If not, use EasyBCD 2.0 beta in Win7 to add VIsta.

Others may have an easier idea. You'll have the backup image as a path back, so it's worth a try since Win7's drive letter is in most cases relative anyway.

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I have a triple boot desktop computer with XP, Vista, and windows 7, and some storage partitions as fat 32 and ntfs types. Each operating system shows the partitions with different drive letters. From booted in the XP it is drive G, Vista is C, 7 is D, and with the 2 optical DVD/CD drives, and the 3 storage partitions, I can change those drive letters some to allow drive E to then become available for the XP system. So is there any way to change my XP from drive G to E, such as booting to the XP recovery console and using the diskpart or map commands, or some registry edit to do this change, thanks.

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I don't understand how, but when I installed XP MCE, it was with all other drives disconnected. However, when I went to Disk Management, it's partition is labeled G:, while W7 is labeled L: when running MCE. I want to change G: to the usual C:. but Disk Management won't permit that, and when I tried something similar with Acronis Disk Director some time back, the OS would no longer boot, so I'm not anxious for a repeat performance.

The question is, how to relabel the partition safely?

A:Changing OS Partition Drive Letter

I wouldn't and don't think you can change it, not without re-installing. As you have seen Windows won't let you change the drive letter of the partition windows is installed too. The main reason is that doing that would break a lot of programs etc. They would be looking for the old drive letter not the new one. Do you have a flash card reader installed? If yes that would be my guess as to why the drive letter got to be so high. I've seen that happen in XP if the hard drive wasn't formatted. It doesn't get a drive letter until after its formated. The other formatted drives would get C:, D:, etc. I didn't think windows 7 did that anymore but I could be wrong. Like a lot of people, I've only been using it for a short while. Now that the drive is formated it should get the first drive letter C: so a re-install should fix it. It just depends on how much that bothers you as to whether you want to do it over again.

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Hello....great forum!
my C: is a SSD Id like to have back as one disc, one partition..

The 101 mb 'unallocated' It was previously listed as " reserved system protected drive" I removed and formatted its 101 mb...back to empty, unallocated, can I lose that partition??

It shows up under disc management as a part of c...but really has no drive letter at all it just shows as C:

Many thx for ideas rick

A:SSD partition on c: sys drive. has no letter 'unallocated'

Are you currently using that C as your OS partition, if so, you need that other partition as is..

101mb is roughly the equivalent of 60 photos, your temp internet files can be 10x that amount. and its not not taking up a drive letter.

Do you really want/need that space?

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I want to assign a particular drive letter (R) to a partition on a drive for compatibility with another computer system. However when I attempt to change the drive letter using Windows Disk Management, "R" is not shown as a choice. There is no other disk shown in the listing of Volumes with the drive letter "R", and every other unassigned letter is available, so why isn't "R" shown? If indeed R is assigned to something, how can I find out what it is?

A:Can't assign a particular drive letter to a partition

Hello coffent,

You should be able to use OPTION TWO to see if "R" has already been assigned. If so, then you could use step 4 in OPTION TWO to swap the "R" drive letter with the letter the partition is currently using.

Drive Letter - Add, Change, or Remove in Windows

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Hey TSF, i'm a student, and I recently bought a 500gb External Hard Drive for use with school. I also bought a PS3 and would like to add my music and movies to that. I researched about the PS3, and learnt I needed to convert the hard drive type (not sure how to describe it) to FAT32. I decided to create a partition, so the whole thing wouldnt be converted to FAT32. But after something I did (I've used Swissknife, but it didnt work, maybe thats something to do with it), one of my partitions that was previsously unallocated space turned into a primary partition. However, it wasnt labelled as healthy or as a primary partition (im just presuming it is because of the blue on the Disk Management window), and also with no drive label.


A:[SOLVED] Partition has no drive letter.

Sorry, here is a screenshot.

Im not bothered if I have to format it, as I dont have any data to lose on the HDD :)

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I have 2 HD

1. WD Raptor 36 GB (2 partition 8GB-System, 27GB-Other)
2. WD Caviar 200 GB

With Partition Magic i have changed drive letter on 2nd HD:
and so on

I did`t touch the primary partition. The problem is when I start My Computer in Task Manager "explorer" has taken around 98% of CPU USAGE,it is the same when I creating a shortcut to one of the partition and try to open it.

I have to END PROCESS "explorer" in TASK MANAGER and run it again,and everything work fine until I run previous command.



A:Partition Magic 8.0 -drive letter

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hey dere, my files in drive c: are infected by a virus and they have infected my windows files as well, i m using windows xp.the problem is when i try doing clean boot the files are not removed from the drive so how do i format my drive c: as it is a primary partition.plzzzzzzzzzzzz help.

A:how to format primary partition(drive C:)

Have you got no anti virus that you can do a scan with? I am assuming you are on xp have you an operating system disk or reload disk? What is the name of the virus?

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I have a Windows 7 Ultimate 64bit system running a Dual Core 2.3ghz processor with 4mb ram.

I have some bad cluster problems with my primary drive C. Sometimes I get the blue screen of death, and an automatic reboot. In the reboot, the system goes through a chkdisk procedure and reports on several bad clusters. The drive is a 1tb drive partitioned into two sections 1 section is 124,2 gb (the boot section) and an 807.39 gb secondary drive labeled drive F. This is a Western Digital SATA drive.

I recently purchased a second 1tb Toshiba SATA drive, and cloned my drive C to the new Drive D. I used the freeware version of the program HDClone to do the job. The new drive D is an exact clone of drive C. There are two partitions D = 124.2gb, and E = 807.39gb. During the cloning, there were some sectors that contained the bad clusters that were not transferred to Drive D. However, so far, I have not discovered any major programs that are not operating as they should. If I discover a minor glitch, I think I can reinstall that program and solve the problem.

I have checked the new cloned drive, and it seems to work fine. I tested it by disconnecting the original boot drive C from the system and rebooting. Everything went good, however a little loss in speed. I then ran Win 7 repair disk on drive D. The repair program found some errors and repaired them. When I then retested drive D, it seems to now run at the same speed as the old Drive C ran at.

I plan to reformat the old Drive ... Read more

A:Cloning Primary Partition Drive

Quote: Originally Posted by edawood

...I have checked the new cloned drive, and it seems to work fine. I tested it by disconnecting the original boot drive C from the system and rebooting. Everything went good, however a little loss in speed. I then ran Win 7 repair disk on drive D. The repair program found some errors and repaired them. When I then retested drive D, it seems to now run at the same speed as the old Drive C ran at.

Not good ... slow drive performance CAN be an early indication of impending drive failure -- as the OS tries to read the same (failing) sector over and over and over, until it either succeeds, or gives up. The new drive isn't by any chance a Western Digital, is it? I've had three new ones fail on me this year.

My goal is to make drive D my new drive C with a drive D partition, and the older drive (presently drive C) my secondary drive E with a drive F partition. Will just renaming the drives in disk management accomplish this goal, or is there a more correct way to rename the drives?

Win7 automatically considers the OS "drive" as C: -- so I wouldn't "name" it that (if you mean, the drive Label); instead, I would name it something like "OS-Vol". Windows will assign it the drive letter of "C" when it boots.

Would do the same with the names of the other volumes -- use something that indicates the purpose of the volume, not the dr... Read more

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So I did not know that programs still recognize A and B drives as floppy. Since my old Vista partition was C: I named my Windows 7 partition B:

Now I can't install/update half the programs.

Is there any way that I can rename the B: drive? If not, can I move it (windows 7, boot files, etc) to my other partition X: which is (empty) and bigger than B:?

Thank you

A:Named primary partition as B drive

Not clear what you are saying.

Did you install win7 from inside Vista?

Does win7 call itself B when you are booted into it?

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