Windows 8 and 8.1 Forums

External disk : diskpart shows disk but no drive letter

  1. #1

    Posts : 4
    windows 8.1

    External disk : diskpart shows disk but no drive letter


    I have a HDD 750G with 2 partitions NTFS with data.
    used externally in a USB3 box connected to my windows 8.1 asus laptop.

    No idea what I do, I always use 'eject' before disconnecting this HDD, but now I see that with diskpart :

    DISKPART> list disk

    Disk ### Status Size Free Dyn Gpt
    -------- ------------- ------- ------- --- ---
    Disk 0 Online 238 GB 1024 KB *
    Disk 1 Online 22 GB 0 B *
    * Disk 2 Online 698 GB 611 GB

    DISKPART> list volume

    Volume ### Ltr Label Fs Type Size Status Info
    ---------- --- ----------- ----- ---------- ------- --------- --------
    Volume 0 E DVD-ROM 0 B No Media
    Volume 1 C OS NTFS Partition 49 GB Healthy Boot
    Volume 2 D Data NTFS Partition 167 GB Healthy
    Volume 3 SYSTEM FAT32 Partition 100 MB Healthy System
    Volume 4 Recovery NTFS Partition 900 MB Healthy Hidden
    Volume 5 Restore NTFS Partition 20 GB Healthy Hidden

    so disk 2 is there, but no volume, no partition, no drive letter. just a 'bip' sound when I connect the disk to usb port.

    i try with paragon disk manager or aomei partition assistant, but can't assign a drive letter (option greyed)
    how can I do to get 2 drive letters & access my datas ?

    thanks for help

      My System SpecsSystem Spec

  2. #2

    What does Win8 Disk Management show for that drive? If it shows as "raw" in the list, and it won't let you assign a drive letter, it could be that the drive has failed.
      My System SpecsSystem Spec

  3. #3

    try in diskpart
    select disk 2

    See if that gives a drive letter to one of the partitions on the drive, if not, afraid you got an error in the mbr or gpt tables. Or as said, drive has failed..............
      My System SpecsSystem Spec

  4. #4

    Posts : 4
    windows 8.1

    thanks for help, but still not solved (diskpart - assign don't assign a letter).
    in attach the disk management screenshot (disk 3 here)
    Click image for larger version
      My System SpecsSystem Spec

  5. #5

    So basically, it won't let you assign a letter to the 88GB OEM partition on disk #3?

    What you could try is using the Minitool Partition Wizard Free Edition to do a Check on that partition. That will force a CHKDSK to be run to see if the filesystem is corrupted.

    After that, you should be able to assign a drive letter.
      My System SpecsSystem Spec

  6. #6

    Posts : 4
    windows 8.1

    I try ESAUS partition recovery & active partition recovery, but can't get my data back
    a delete partion / create partition solve the issue
    Thanks for help
      My System SpecsSystem Spec

  7. #7

    Deleting and recreating partitions does not actually erase the files and folders, it just recreates the partition table.

    You might still be able to recover some of the files and folders using "recuva".
      My System SpecsSystem Spec

  8. #8

    I don't understand how you managed to end up with a 'logical drive' instead of a primary partition, either mbr or gpt. sounds like you have a boot record error, the drive type got changed somehow. If you re-initialize the drive you'll lose any info on it. I used to use aefdisk32 on xp to manipulate the partition type descriptor on computers with virus changed mbr's. I've never had to change one with diskpart, but deleting and re-creating a partiton WILL remove formatting, and files WILL be lost from the directory structure. A logical drive was only used with MBR partition structure when more than 4 partitions were needed. It isn't used in GPT, as the partition table isn't limited to 4 partitions.
      My System SpecsSystem Spec

External disk : diskpart shows disk but no drive letter

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