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Thread: Formatting a large external hard disk

  1. #21
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    Re: Unable To Format 3TB WD Mybook

    Quote Originally Posted by mreos View Post
    Not sure why my thread was merged with the other member. The replies now look disconnected. I thought if I have my own issue (error) that I should create my own thread. If I'm wrong, let me know so I know for next time. Thank you.
    You started your own thread and posted a question on another thread about essentially the same issue, and received replies in both. This dilutes community effort.

    Please do not PM me about your forum account unless you have been asked to. The correct place to contact an admin about your account is here.

  2. #22
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    Exclamation Re: Formatting a large external hard disk

    Is there a bug in Ubuntu?

    Also, there seems to be a lot of headaches caused by these 3TB drives as evident when searching on the web for solutions.

    I used gparted from bootable USB (Ubuntu 11.10 64bit) and I think I finally have a GPT partition

    but when I go into disk utlity and look at the info, the partition type shows:

    Model: WD My Book 1140
    Firmware Version: 1003
    Capacity: 3.0 TB (3,000,558,944,256 bytes)
    Partitioning: Unknown Scheme:
    Usage: Filesystem
    Partition type: Unknown ()
    Type: Ext4 (version 1.0)

    I then launch gparted and the device information shows:
    Model: WD My Book 1140
    Size: 2.73 TiB
    Partition table: gpt
    Heads: 255
    Sectors/track: 63
    Cylinders: 45599
    Total sectors: 732558336
    Sector size: 4096

    The external drive is plugged into the USB 3.0 port. Because of the unknown, I'm afraid to start copying files onto the external drive.

  3. #23
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    Re: Formatting a large external hard disk

    On my small drives Disk Utility shows gpt. Perhaps something about the 4K sectors?

    What does this show?

    sudo parted /dev/sda unit s print
    For info on UEFI boot install & repair:
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  4. #24
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    Re: Formatting a large external hard disk

    Quote Originally Posted by oldfred View Post
    On my small drives Disk Utility shows gpt. Perhaps something about the 4K sectors?

    What does this show?

    sudo parted /dev/sda unit s print

    Here's the output for the 3TB:

    Code:
    Model: WD My Book 1140 (scsi)
    Disk /dev/sda: 732558336s
    Sector size (logical/physical): 4096B/4096B
    Partition Table: gpt
    
    Number  Start  End         Size        File system  Name  Flags
     1      256s   732558079s  732557824s
    As a test, I tried it on a much smaller drive and I'm assuming this is what I should be seeing:

    disk utility shows:
    Partitioning:GUID Partition Table
    Usage: Filesystem
    Partition type: Linux Basic Data Partition

    gparted shows:
    Partition table: gpt

  5. #25
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    Re: Formatting a large external hard disk

    It looks like you have a partition that is unformated? Did you format it to NTFS or ext4?

    What you see on your smaller drive is exactly what I see on my two gpt drives that are 160GB & 60GB.

    Code:
    fred@fred-MavericDT:~$ sudo parted /dev/sdd unit s print
    [sudo] password for fred: 
    Model: ATA SSD G2 series 64 (scsi)
    Disk /dev/sdd: 117231408s
    Sector size (logical/physical): 512B/512B
    Partition Table: gpt
    
    Number  Start      End         Size       File system  Name  Flags
     1      2048s      616447s     614400s    fat32              boot
     2      616448s    618495s     2048s                         bios_grub
     3      618496s    58925055s   58306560s  ext4         04
     4      58925056s  117229567s  58304512s  ext4         10
    For info on UEFI boot install & repair:
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  6. #26
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    Re: Formatting a large external hard disk

    Very strange how disk utility is showing something different than what gparted is showing

    I've attached screens from both utility and gparted
    Attached Images Attached Images

  7. #27
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    Re: Formatting a large external hard disk

    My guess ( I do not really know) is that Disk Utility is not truly updated for gpt for 4K drives. It seems to show gpt smaller drives ok. I think gparted then is more reliable.

    My only concern then is what else is not updated for the new 4K drives. I have seen some issues on smaller external drives with 4K which did not seem necessary.

    The WD site says all new kernels are updated, so it should work, but then some utilities may not.

    What does gdisk show?

    Code:
    fred@fred-MavericDT:~$ sudo gdisk /dev/sdd -l
    [sudo] password for fred: 
    GPT fdisk (gdisk) version 0.7.1
    
    Partition table scan:
      MBR: protective
      BSD: not present
      APM: not present
      GPT: present
    
    Found valid GPT with protective MBR; using GPT.
    Disk /dev/sdd: 117231408 sectors, 55.9 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): 85A657E7-D379-4592-B060-E8EA09953D80
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 117231374
    Partitions will be aligned on 2048-sector boundaries
    Total free space is 3821 sectors (1.9 MiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1            2048          616447   300.0 MiB   EF00  
       2          616448          618495   1024.0 KiB  EF02  
       3          618496        58925055   27.8 GiB    0700  04
       4        58925056       117229567   27.8 GiB    0700  10
    Last edited by oldfred; November 20th, 2011 at 08:16 PM.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  8. #28
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    Re: Formatting a large external hard disk

    Quote Originally Posted by oldfred View Post

    What does gdisk show?
    I copy and paste your command but get this:

    Code:
    sudo: gdisk: command not found
    Update: I was able to find and install fdisk from here (thought it was part of ubuntu)

    I'm getting this for output:
    Code:
     GPT fdisk (gdisk) version 0.6.14
    
    Partition table scan:
      MBR: protective
      BSD: not present
      APM: not present
      GPT: present
    
    Found valid GPT with protective MBR; using GPT.
    Disk /dev/sda: 732558336 sectors, 2.7 TiB
    Logical sector size: 4096 bytes
    Disk identifier (GUID): A1634F7C-96A4-48D9-B73C-BC91D10FFAF3
    Partition table holds up to 128 entries
    First usable sector is 6, last usable sector is 732558330
    Partitions will be aligned on 256-sector boundaries
    Total free space is 501 sectors (2.0 MiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1             256       732558079   2.7 TiB     0700
    Last edited by mreos; November 20th, 2011 at 09:21 PM.

  9. #29
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    Re: Formatting a large external hard disk

    I would download the newest gdisk if you want to do more than just list partition info with it.

    GPT fdisk Tutorial -srs5694 in forums
    http://ubuntuforums.org/showthread.php?t=1439794
    http://www.rodsbooks.com/gdisk/
    http://www.rodsbooks.com/gdisk/download.html#obs

    Both gparted & gdisk seem to say it it ok. Have you copied some data and check to see if you have any issues?

    Unless you have real needs for one very large partition, I would not have just one. Since it is NTFS, you need to run chkdsk periodically and it may take days if you fill it with data. Or if you have data corruption any scan tool may take many days to find lost info.
    Last edited by oldfred; November 20th, 2011 at 09:50 PM.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  10. #30
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    Re: Formatting a large external hard disk

    @oldfred I had the same WD size. I encontered the 4k problem in both situations trying to partition the disk in 1 partition and in multiple partition. Gparted was able to handle ~1tb (better if less ~900MB) of a partition with no problem but i encountered again the 4k problem when partitioning the rest.My solution was to use different fs , I used ext4 , HFS+(no journal)and ext3 . Don't ask me why!

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