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Thread: Can't obtain UUID from Hard Drive Partition.

  1. #1
    Join Date
    Oct 2012
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    3

    Can't obtain UUID from Hard Drive Partition.

    I just installed Ubuntu 12.10 32-bit and I am having some problems trying to get my Hard Drive's UUID. I have tried manually mounting it and it works, but I have to use "-o dmask=000,fmask=111" as it is formatted as FAT32.

    When I run "sudo fdisk -l" it come up with:

    Code:
     
    Disk /dev/sda: 500.1 GB, 500107862016 bytes 
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes / 4096 bytes 
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
    Disk identifier: 0x0007eae6 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sda1   *        2048   965292031   482644992   83  Linux 
    /dev/sda2       965294078   976771071     5738497    5  Extended 
    Partition 2 does not start on physical sector boundary. 
    /dev/sda5       965294080   976771071     5738496   82  Linux swap / Solaris 
     
    Disk /dev/mapper/cryptswap1: 5876 MB, 5876219904 bytes 
    255 heads, 63 sectors/track, 714 cylinders, total 11476992 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes / 4096 bytes 
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
    Disk identifier: 0x8fc8a283 
     
    Disk /dev/mapper/cryptswap1 doesn't contain a valid partition table 
     
    Disk /dev/sdb: 500.1 GB, 500107862016 bytes 
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors 
    Units = sectors of 1 * 512 = 512 bytes 
    Sector size (logical/physical): 512 bytes / 512 bytes 
    I/O size (minimum/optimal): 512 bytes / 512 bytes 
    Disk identifier: 0xbd974a90 
     
       Device Boot      Start         End      Blocks   Id  System 
    /dev/sdb1   *   903383145   976768064    36692460    c  W95 FAT32 (LBA) 
    /dev/sdb2              64   903383144   451691540+   f  W95 Ext'd (LBA) 
    /dev/sdb5             127   903383144   451691509    b  W95 FAT32 
     
    Partition table entries are not in disk order
    My device is device has two partitions, "/dev/sdb1" and "/dev/sdb5". "/dev/sdb1" is for my live USB installs and automounts perfectly. "/dev/sdb5" is for storage but when will not automount.

    When I try "sudo blkid" only the first partition appears:

    Code:
    /dev/mapper/cryptswap1: UUID="5da4ac94-6b41-4135-813f-1fda34fadf32" TYPE="swap"  
    /dev/sda1: UUID="a64e3e3f-bf23-4f8d-81b1-ef13d4d22ef7" TYPE="ext4"  
    /dev/sdb1: LABEL="PENDRIVE" UUID="1C03-185E" TYPE="vfat"
    Any help would be appreciated as this is my first day on Linux and I already love it way more than Windows. If you need any more info, or help interpreting (still getting used to gnome) just ask, please!

  2. #2
    Join Date
    Jan 2010
    Location
    India
    Beans
    Hidden!
    Distro
    Lubuntu 14.04 Trusty Tahr

    Re: Can't obtain UUID from Hard Drive Partition.

    http://www.iloveubuntu.net/how-repai...rtition-ubuntu

    The the above link & see if you can obtain the UUID.
    Lubuntu 14.04 / Antergos (Dual Boot)
    'Those who surrender freedom for security will not have, nor do they deserve, either one.' Benjamin Franklin

  3. #3
    Join Date
    Nov 2011
    Location
    /dev/root
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    7,152

    Re: Can't obtain UUID from Hard Drive Partition.

    Welcome to the Ubuntu Forums

    Try with this command, to see if it helps you find the UUID of the /dev/sdb5

    Code:
    sudo blkid -c /dev/null
    The output about cryptswap is OK. This is because when you have 'encrypted home', also the swap will be encrypted.

    But you should get information about all FAT32 partitions.

    Another option is to install and run gparted

    Code:
    sudo apt-get install gparted
    and run it with
    Code:
    gksudo gparted
    Select device at the right top corner!
    Click on the Partition pull down menu and select Information (or something similar, I don't have an English menu).

    UUID should be shown there. If this does not work, there is

    - either something wrong with the partition table,

    - or maybe the problem is that you run the newest version of Ubuntu (12.10). The previous version 12.04 LTS has long time support until April 2017, and it is more stable (debugged). If it will recognize your hardware, I'd recommend that you run 12.04 LTS, or at least that you test it live (booted from the install USB or CD drive).

  4. #4
    Join Date
    Oct 2012
    Beans
    3

    Re: Can't obtain UUID from Hard Drive Partition.

    Thanks, I have obtained the UUID (I believe) from Gparted. Under information it said "UUID: CCCD-6468". My problem now when I run "sudo mount -a" is that Terminal says no special device exists.

    Code:
    $ sudo mount -a
    mount: special device UUID=CCCD-6468 does not exist
    Here is my fstab:

    Code:
    # /etc/fstab: static file system information.
    #
    # Use 'blkid' to print the universally unique identifier for a
    # device; this may be used with UUID= as a more robust way to name devices
    # that works even if disks are added and removed. See fstab(5).
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    # / was on /dev/sda1 during installation
    UUID=a64e3e3f-bf23-4f8d-81b1-ef13d4d22ef7 /               ext4    errors=remount-ro 0       1
    # swap was on /dev/sda5 during installation
    #UUID=bb7845d7-1966-460c-abf4-f6ba0a05faca none            swap    sw              0       0
    /dev/mapper/cryptswap1 none swap sw 0 0
    #/dev/hdb5
    UUID=CCCD-6468 /media/uber/   vfat rw,user,auto,fmask=0177,dmask=0077,uid=1000   0  0

  5. #5
    Join Date
    Nov 2011
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    /dev/root
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    7,152

    Re: Can't obtain UUID from Hard Drive Partition.

    Quote Originally Posted by gamerman56 View Post
    ...
    UUID=CCCD-6468 /media/uber/ vfat rw,user,auto,fmask=0177,dmask=0077,uid=1000 0 0[/CODE]
    I don't see any obvious error. I tried to mount a FAT32 drive with your specs (except I had another UUID and /mnt). It was possible with the following command, which should correspond to your line in fstab.

    Code:
    sudo mount -U D706-B2D6 -t vfat -o rw,user,auto,fmask=0177,dmask=0077,uid=1000 /mnt
    The response was the following line in /etc/mtab
    Code:
    /dev/sdd1 /mnt vfat rw,noexec,nosuid,nodev,fmask=0177,dmask=0077,uid=1000 0 0
    So 'the same' works for me.
    --
    Maybe there is a typing error.

    - Double-check the UUID of your FAT32 partition.
    - Double-check the directory /media/uber

    It need not exist for automount, but when you mount via fstab or mount, it must exist, and have read/write access at least for root (superuser).

    Maybe there is something wrong in the partition table or file system which also makes blkid fail to find the partition.

    Can you try to check/repair your FAT32 file system with
    Code:
    chkdsk /f
    when booted in Windows?

  6. #6
    Join Date
    Oct 2009
    Location
    Elgin, IL USA
    Beans
    2,531
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Can't obtain UUID from Hard Drive Partition.

    Just curious what created sdb2 with sdb5 before sdb1 on your disk. People with partitions in the wrong order often seem to have issues.
    i5 650 3.2 GHz, 8 GB, nvidia GTX 550 Ti 32" 1080p | i7-4700, 8 GB, Intel HD 4600/nvidia GTX 765M 15.6" 1080p | etc.

  7. #7
    Join Date
    Oct 2012
    Beans
    3

    Re: Can't obtain UUID from Hard Drive Partition.

    Quote Originally Posted by efflandt View Post
    Just curious what created sdb2 with sdb5 before sdb1 on your disk. People with partitions in the wrong order often seem to have issues.
    I had Windows 7 before this, and so /dev/sdb5 was the original partition, but then I created another partition to use for my Live USB.


    Quote Originally Posted by sudodus View Post
    It was possible with the following command, which should correspond to your line in fstab.

    Code:
    sudo mount -U D706-B2D6 -t vfat -o  rw,user,auto,fmask=0177,dmask=0077,uid=1000 /mnt
    The response was the following line in /etc/mtab
    Code:
    /dev/sdd1 /mnt vfat rw,noexec,nosuid,nodev,fmask=0177,dmask=0077,uid=1000 0 0
    So 'the same' works for me.
    ...

    Can you try to check/repair your FAT32 file system with
    Code:
    chkdsk /f
    when booted in Windows?
    When try the command you gave I receive this:

    Code:
    $ sudo mount -U CCCD-6468 -t vfat -o rw,user,auto,fmask=0177,dmask=--77,uid=1000 /media/uber/
    [sudo] password for mark: 
    mount: no such partition found
    While manually mounting the drive is still successful:

    Code:
    $ sudo mount /dev/sdb5 /media/uber
    I will go boot up my Windows computer and get back to you with the results.

  8. #8
    Join Date
    Nov 2011
    Location
    /dev/root
    Beans
    7,152

    Re: Can't obtain UUID from Hard Drive Partition.

    Quote Originally Posted by gamerman56 View Post
    I had Windows 7 before this, and so /dev/sdb5 was the original partition, but then I created another partition to use for my Live USB.




    When try the command you gave I receive this:

    Code:
    $ sudo mount -U CCCD-6468 -t vfat -o rw,user,auto,fmask=0177,dmask=--77,uid=1000 /media/uber/
    [sudo] password for mark: 
    mount: no such partition found
    While manually mounting the drive is still successful:

    Code:
    $ sudo mount /dev/sdb5 /media/uber
    I will go boot up my Windows computer and get back to you with the results.
    Then I think that UUID is not CCCD-6468

    Try this:

    - Use gksudo gparted again to put a label onto the partition /dev/sdb5: I suggest uber since you use that name for mounting.

    - Mount by label instead (almost as safe as by UUID) and much better than mount by block device (/dev/sdb5 might change)

    Code:
    $ sudo mount -L uber -t vfat -o rw,user,auto,fmask=0177,dmask=--77,uid=1000 /media/uber
    and if that works enter it into /etc/fstab

    Code:
    #/dev/hdb5
    LABEL=uber /media/uber/   vfat rw,user,auto,fmask=0177,dmask=0077,uid=1000   0  0

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