1.    30 Oct 2015 #1
    Join Date : Jul 2015
    Posts : 137
    Windows 7 Pro x64

    Disk Management Issue -- Again


    I had this issue once before and was helped, but I honestly can't remember how I was helped, and between Sevenforums, Eightforums, and Tenforums, I cannot find my old thread. So, with that in mind, here is the problem I'm having:

    Click image for larger version. 

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ID:	45581

    The 4TB drive (see the black, unallocated chunks) is showing one GPT protected partition (which cannot be deleted) and two RAW partitions which cannot seem to be consolidated. I need to make the entire drive one partition so it can be used as a backup drive for a hotswap bay. This came out of a Seagate external HDD enclosure, and the drive was originally formatted FAT32, and the enclosure utilized a PCB to make the entire drive accessible (probably for mac compatibility). Anyway... I don't remember how I converted the last drive, and really wish I had documented it. Help??
      My ComputerSystem Spec
  2.    30 Oct 2015 #2
    Join Date : Jul 2015
    California
    Posts : 203
    Kernel 4.x.x

    Open cmd.exe as administrator.

    Run these commands EXACTLY or risk huge data loss.

    Code:
    diskpart
    sel dis 3
    cle
    conv gpt
    cre par pri
    format fs=ntfs quick
    ass letter=S
    exit
    exit
    "ass letter=S" change that S to whatever drive letter you desire if you so choose
      My ComputersSystem Spec
  3.    30 Oct 2015 #3
    Join Date : Oct 2015
    Posts : 3
    Windows 10 32bit

    You can use diskpart.exe to delete that partition, and then convert the disk to GPT. If you are not familiar with diskpart, try a free partition manager software. you can find many of then in the internet.
      My ComputerSystem Spec
  4.    30 Oct 2015 #4
    Join Date : Jul 2015
    Posts : 137
    Windows 7 Pro x64
    Thread Starter

    Quote Originally Posted by Hydranix View Post
    Open cmd.exe as administrator.

    Run these commands EXACTLY or risk huge data loss.

    Code:
    diskpart
    sel dis 3
    cle
    conv gpt
    cre par pri
    format fs=ntfs quick
    ass letter=S
    exit
    exit
    "ass letter=S" change that S to whatever drive letter you desire if you so choose
    Bonus points for the command line info; it's my preferred method of doing things. Thank you!

    PS: Bookmarked.
      My ComputerSystem Spec
  5.    31 Oct 2015 #5
    Join Date : Sep 2015
    Posts : 2,308
    Windows 10 Pro 64-bit 1706 (CU build 15063.674)

    I didn't know there are abbreviated versions of the instructions. I would use the whole words, such as select disk 3, clean, convert gpt, create partition primary, format fs=ntfs quick, assign letter=s. Just make sure the disk you want to use is 3 (see Disk Management again) so as not to accidentally wipe any other disk! I would rather disconnect everything else and use a Windows DVD-ROM to run diskpart from there.
      My ComputerSystem Spec
  6.    31 Oct 2015 #6
    Join Date : Jul 2015
    California
    Posts : 203
    Kernel 4.x.x

    @spapakons I started writing this post for that very reason, but fell asleep before finishing it last nght
    @kbronski and @the random google searcher that lands here:


    Full commands and brief explanation.

    Open cmd.exe as administrator.

    Run diskpart.exe to do unrestricted disk and partition management
    Code:
    diskpart
    Select the disk you intend to modify. The number (3 in this case) directly relates to number shown in the Disk Management GUI. You DO NOT want to select the wrong disk and issue the clean command. Otherwise you will need third party recovery software.
    Code:
    select disk 3
    Permanently (still recoverable in emergency) remove all partitions from the disk.
    Code:
    clean
    Convert the disks partition table to the modern GPT format. Allows more partitions, and has protection against corruption. (also required to boot Windows
    Code:
    convert gpt
    Create a single "primary" (primary/logical is irrelevant to GPT disks, but Windows still uses this term in this program) partition, spanning the entire disk.
    Code:
    create partition primary
    The newly created partition is automatically selected, so you can issue the format command to write a filesystem to it. The filesystem in this case is NTFS, and the option quick means that instead if erasing the partition, it just writes an empty filesystem to it. It will behave like an erased disk, but old data is still recoverable until you write enough data to the disk to cover the old data. Only omit the quick option if security is a concern, or if the disk behaves strangely. (I've had Windows 7 install not accept a non-zeroed disk a couple times. Irrelevant with modern operating systems.)
    Code:
    format fs=ntfs quick
    Now we assign a drive letter to the disk. This will mount the filesystem and allow you to access and store files on the partition.
    Code:
    assign letter=S
    Now we're done, we issue the exit command first to exit diskpart, and a second time to close the CMD prompt. You can also just closer the window at this point. Does the same thing.
    Code:
    exit
    exit
      My ComputersSystem Spec
  7.    31 Oct 2015 #7
    Join Date : Jul 2015
    Posts : 137
    Windows 7 Pro x64
    Thread Starter

    Quote Originally Posted by Hydranix View Post
    @spapakons I started writing this post for that very reason, but fell asleep before finishing it last nght
    @kbronski and @the random google searcher that lands here:


    Full commands and brief explanation.

    Open cmd.exe as administrator.

    Run diskpart.exe to do unrestricted disk and partition management
    Code:
    diskpart
    Select the disk you intend to modify. The number (3 in this case) directly relates to number shown in the Disk Management GUI. You DO NOT want to select the wrong disk and issue the clean command. Otherwise you will need third party recovery software.
    Code:
    select disk 3
    Permanently (still recoverable in emergency) remove all partitions from the disk.
    Code:
    clean
    Convert the disks partition table to the modern GPT format. Allows more partitions, and has protection against corruption. (also required to boot Windows
    Code:
    convert gpt
    Create a single "primary" (primary/logical is irrelevant to GPT disks, but Windows still uses this term in this program) partition, spanning the entire disk.
    Code:
    create partition primary
    The newly created partition is automatically selected, so you can issue the format command to write a filesystem to it. The filesystem in this case is NTFS, and the option quick means that instead if erasing the partition, it just writes an empty filesystem to it. It will behave like an erased disk, but old data is still recoverable until you write enough data to the disk to cover the old data. Only omit the quick option if security is a concern, or if the disk behaves strangely. (I've had Windows 7 install not accept a non-zeroed disk a couple times. Irrelevant with modern operating systems.)
    Code:
    format fs=ntfs quick
    Now we assign a drive letter to the disk. This will mount the filesystem and allow you to access and store files on the partition.
    Code:
    assign letter=S
    Now we're done, we issue the exit command first to exit diskpart, and a second time to close the CMD prompt. You can also just closer the window at this point. Does the same thing.
    Code:
    exit
    exit

    Yes, I gathered all of that by reading the initial code you had posted. Thanks, though.
      My ComputerSystem Spec

 


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