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Dear friends, I bought a five-bay external HDD enclosurer for my redhat linux computer (Workstation 6.3). The HDDs are 5 * WD 3.5'' 3TB SATA III. The enclosurer is conected ...
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  1. #1
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    Unhappy Redhat Linux find only 1 out of 5 hdds in an external HDD enclosurer


    Dear friends,

    I bought a five-bay external HDD enclosurer for my redhat linux computer (Workstation 6.3). The HDDs are 5 * WD 3.5'' 3TB SATA III. The enclosurer is conected to my linux via a USB 3.0 port.

    The "disk utility" on REHL can find only one out of the five HDDs. I have also tried to the enclosurer with a win 7 computer, all the five hdds can be detected and visited with no problem.

    I appreciate your kind help with the matter because I really don't know what should I do in the next step. Please also let me know if more information is required address the issue.

    Best wishes,

    Noah

    The follow are the result running "cat /proc/partitions" and "fdisk -l"

    $ cat /proc/partitions
    Code:
    major minor  #blocks  name
    
       8        0 1953514584 sda
       8        1     305368 sda1
       8        2     512000 sda2
       8        3    6292188 sda3
       8        4          1 sda4
       8        5 1945854976 sda5
     253        0   52428800 dm-0
     253        1   35078144 dm-1
     253        2 1858347008 dm-2
       8       16 2930266584 sdb
       8       32 2930266584 sdc
       8       64 2930266584 sde
       8       80 2930266584 sdf
       8       48 2930266584 sdd
    *******NOTE: sdb-sdf are the five hdds **************
    $ sudo fdisk -l
    Code:
    Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
    255 heads, 63 sectors/track, 243201 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0x0b88b56f
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1               2          40      305368   de  Dell Utility
    Partition 1 does not end on cylinder boundary.
    /dev/sda2   *          40         103      512000   83  Linux
    Partition 2 does not end on cylinder boundary.
    /dev/sda3             171         954     6292188   83  Linux
    Partition 3 does not end on cylinder boundary.
    /dev/sda4             954      243202  1945856088    5  Extended
    /dev/sda5             954      243202  1945854976   8e  Linux LVM
    
    Disk /dev/mapper/VolGroup-lv_root: 53.7 GB, 53687091200 bytes
    255 heads, 63 sectors/track, 6527 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0x00000000
    
    
    Disk /dev/mapper/VolGroup-lv_swap: 35.9 GB, 35920019456 bytes
    255 heads, 63 sectors/track, 4367 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0x00000000
    
    
    Disk /dev/mapper/VolGroup-lv_home: 1902.9 GB, 1902947336192 bytes
    255 heads, 63 sectors/track, 231353 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0x00000000
    
    
    WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
    
    
    Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes
    255 heads, 63 sectors/track, 364801 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    I/O size (minimum/optimal): 4096 bytes / 4096 bytes
    Disk identifier: 0xb0d88907
    
       Device Boot      Start         End      Blocks   Id  System
    $
    Last edited by MikeTbob; 03-23-2013 at 05:23 AM. Reason: added code tags

  2. #2
    Trusted Penguin Irithori's Avatar
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    Hi and welcome

    try
    Code:
    parted -l
    and/or
    Code:
    parted -l /dev/sdb
    parted -l /dev/sdc
    parted -l /dev/sdd
    parted -l /dev/sde
    parted -l /dev/sdf
    You must always face the curtain with a bow.

  3. #3
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    Hi Irithori,

    Thank you very much.

    The following are outputs running "parted -l".

    $ sudo parted -l
    Code:
    Model: ATA ST2000DM001-9YN1 (scsi)
    Disk /dev/sda: 2000GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: msdos
    
    Number  Start   End     Size    Type      File system  Flags
     1      8229kB  321MB   313MB   primary   fat32        diag
     2      322MB   846MB   524MB   primary   ext4         boot
     3      1399MB  7842MB  6443MB  primary   ext3
     4      7842MB  2000GB  1993GB  extended
     5      7843MB  2000GB  1993GB  logical                lvm
    
    
    Warning: /dev/sdb contains GPT signatures, indicating that it has a GPT table.
    However, it does not have a valid fake msdos partition table, as it should.
    Perhaps it was corrupted -- possibly by a program that doesn't understand GPT
    partition tables.  Or perhaps you deleted the GPT table, and are now using an
    msdos partition table.  Is this a GPT partition table?
    Yes/No? No                                                                
    
    Error: /dev/sdc: unrecognised disk label                                  
    
    Error: /dev/sdd: unrecognised disk label                                  
    
    Error: /dev/sde: unrecognised disk label                                  
    
    Error: /dev/sdf: unrecognised disk label                                  
    
    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VolGroup-lv_home: 1903GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: loop
    
    Number  Start  End     Size    File system  Flags
     1      0.00B  1903GB  1903GB  ext4
    
    
    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VolGroup-lv_swap: 35.9GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: loop
    
    Number  Start  End     Size    File system     Flags
     1      0.00B  35.9GB  35.9GB  linux-swap(v1)
    
    
    Model: Linux device-mapper (linear) (dm)
    Disk /dev/mapper/VolGroup-lv_root: 53.7GB
    Sector size (logical/physical): 512B/4096B
    Partition Table: loop
    
    Number  Start  End     Size    File system  Flags
     1      0.00B  53.7GB  53.7GB  ext4
    
    
    $
    Last edited by MikeTbob; 03-23-2013 at 05:24 AM. Reason: added code tags

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  5. #4
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    BTW, the hdds were converted to GPT for testing on window 7. But they have already been converted back to MBR before I conected the enclosurer to my linux computer.

  6. #5
    Trusted Penguin Irithori's Avatar
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    gpt is no problem for a recent linux distribution such as redhat 6.3.
    And actually, mbr is the wrong choice for discs >= 2TByte

    Is it correct, that there is no data on these five discs?
    If yes, set a gpt label
    Code:
    sudo parted
    select /dev/sdb
    mklabel gpt
    select /dev/sdc
    mklabel gpt
    select /dev/sdd
    mklabel gpt
    select /dev/sde
    mklabel gpt
    select /dev/sdf
    mklabel gpt
    print
    quit
    You must always face the curtain with a bow.

  7. #6
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    $ sudo parted
    Code:
    GNU Parted 2.1
    Using /dev/sda
    Welcome to GNU Parted! Type 'help' to view a list of commands.
    (parted) select /dev/sdb                                                  
    Using /dev/sdb
    (parted) mklabel qpt                                                      
    parted: invalid token: qpt
    New disk label type? gpt                                                  
    Warning: The existing disk label on /dev/sdb will be destroyed and all data on this disk will be lost. Do you want to continue?
    Yes/No? yes                                                               
    Warning: /dev/sdb contains GPT signatures, indicating that it has a GPT table.  However, it does not have a valid fake msdos
    partition table, as it should.  Perhaps it was corrupted -- possibly by a program that doesn't understand GPT partition tables.  Or
    perhaps you deleted the GPT table, and are now using an msdos partition table.  Is this a GPT partition table?
    Yes/No? No                                                                
    (parted) select /dev/sdc
    Using /dev/sdc
    (parted) mklabel gpt                                                      
    Error: Input/output error during read on /dev/sdc                         
    Retry/Ignore/Cancel? R                                                    
    Error: Input/output error during read on /dev/sdc                         
    Retry/Ignore/Cancel?
    Last edited by MikeTbob; 03-23-2013 at 05:24 AM. Reason: added code tags

  8. #7
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    Yes. There is no any data on the five hdds.

  9. #8
    Trusted Penguin Irithori's Avatar
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    input/output seems like a hardware error.
    Are the discs properly connected and functional?
    You must always face the curtain with a bow.

  10. #9
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    If it is nessensary, I can also convert the hdds to GPT using window 7.

  11. #10
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    Yes. All the discs work smoothly on windows 7.

    Quote Originally Posted by Irithori View Post
    input/output seems like a hardware error.
    Are the discs properly connected and functional?

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