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Thread: System doesn't see second hard drive

  1. #1
    Join Date
    Oct 2012
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    7

    System doesn't see second hard drive

    Hello.
    I have Ubuntu 12.04.1

    I have 2 hard drives:

    1. SAMSUNG SP80A4H
    2. WD3200AAKS-75B3A0

    which are recognized by BIOS, but only second recognized by the system: I have just sda...
    I added pictures from BIOS and from terminal related to hard drives.
    Sorry about pictures of terminal, next time just text.

    I tried search in the forum but found mostly problems with USB external disk, which is far from my case.

    Thanks for any advice.
    Attached Images Attached Images

  2. #2
    Join Date
    Jul 2010
    Location
    ozarks, Arkansas, USA
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    6,559
    Distro
    Lubuntu 14.04 Trusty Tahr

    Re: System doesn't see second hard drive

    rodnower; Hi ! Welcome to the forum.

    To see what the system sees on the system:
    terminal command (ctl+alt+t):
    Code:
    sudo fdisk -l
    (lower case "L")
    and what gets auto mounted by the system is controlled by the config file:
    /etc/fstab
    See these tutorials for instruction:
    http://ubuntuforums.org/showthread.php?t=283131
    https://help.ubuntu.com/community/Fstab
    https://help.ubuntu.com/community/Mount/
    https://help.ubuntu.com/community/FilePermissions
    http://www.psychocats.net/ubuntu/mountlinux

    edit the file /etc/fstab to mount the drive from the desired "mount point" -attaches the drive to the file system- with your desired mount options. Then you will have access to the drive.

    Post back with any questions.
    just try'n to help <== BDQ

  3. #3
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Hidden!
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    Ubuntu 14.04 Trusty Tahr

    Re: System doesn't see second hard drive

    The tree command shows all my drives, but the are partitioned & formatted. It really is showing partitions, not drives.

    Bashing-om 's suggestion of fdisk may show drive, but unpartitioned?

    gparted & fdisk instructions:
    https://help.ubuntu.com/community/In...gANewHardDrive
    https://help.ubuntu.com/community/HowtoPartition
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    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.







  4. #4
    Join Date
    Feb 2008
    Location
    Wichita, KS
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    Re: System doesn't see second hard drive

    Are you familiar with dmesg? Does it output anything unusual about the boot up of your drives?

    Edit: If you're not familiar try submitting the output of
    Code:
    dmesg | grep ata
    Last edited by escentrix; October 26th, 2012 at 08:36 PM.

  5. #5
    Join Date
    Oct 2012
    Beans
    7

    Re: System doesn't see second hard drive

    Thanx all for replays.
    I made apt-get upgrade and after restart my system discovered second disk (now it is "sda", and main boot device became "sdb"):

    Code:
    andrey@andrey-System-Product-Name:~$ sudo fdisk -l
    [sudo] password for andrey:
    
    Диск /dev/sda: 80.1 Гб, 80059342336 байт
    255 головок, 63 секторов/треков, 9733 цилиндров, всего 156365903 секторов
    Units = секторы of 1 * 512 = 512 bytes
    Размер сектора (логического/физического): 512 байт / 512 байт
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Идентификатор диска: 0x6861f5c5
    
    Valid partition table is missing on /dev/sda
    
    Диск /dev/sdb: 320.1 Гб, 320072933376 байт
    255 головок, 63 секторов/треков, 38913 цилиндров, всего 625142448 секторов
    Units = секторы of 1 * 512 = 512 bytes
    Размер сектора (логического/физического): 512 байт / 512 байт
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Идентификатор диска: 0x0009afc4
    
    Устр-во Загр     Начало       Конец       Блоки   Id  Система
    /dev/sdb1   *        2048   623063039   311530496   83  Linux
    /dev/sdb2       623065086   625141759     1038337    5  Расширенный
    /dev/sdb5       623065088   625141759     1038336   82  Linux своп / Solaris
    But the problem now is: "Valid partition table is missing on /dev/sda"...
    Can I recover partition table?

  6. #6
    Join Date
    Oct 2012
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    7

    Re: System doesn't see second hard drive

    Quote Originally Posted by escentrix View Post
    Are you familiar with dmesg? Does it output anything unusual about the boot up of your drives?

    Edit: If you're not familiar try submitting the output of
    Code:
    dmesg | grep ata
    Thanx for replay
    After upgrade of the system my disk discovered, now I have problem with it's partition table.

  7. #7
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: System doesn't see second hard drive

    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    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. #8
    Join Date
    Oct 2012
    Beans
    7

    Re: System doesn't see second hard drive

    Thanx!
    I will try tomorrow

  9. #9
    Join Date
    Feb 2008
    Location
    Wichita, KS
    Beans
    14

    Re: System doesn't see second hard drive

    You're welcome from before, glad it wasn't anything at boot honestly! oldfred is right, testdisk may be your best option. Do you know what the disk had on it before? We may be able to help more based on what type of partitions it had and how it was structured.

  10. #10
    Join Date
    Oct 2012
    Beans
    7

    Re: System doesn't see second hard drive

    Quote Originally Posted by escentrix View Post
    You're welcome from before, glad it wasn't anything at boot honestly! oldfred is right, testdisk may be your best option. Do you know what the disk had on it before? We may be able to help more based on what type of partitions it had and how it was structured.
    Sure. It was formated for NTFS and kept ordinal windows files. It was non bootable devide and its letter was D.

    I get MBR with dd and print it with hexdump.
    Last records of MBR

    000001b0 65 6d 00 40 00 63 7b da c5 f5 61 68 00 40 00 40 |em.@.c{...ah.@.@|
    000001c0 00 40 00 40 00 40 00 40 00 40 00 40 00 40 00 40 |.@.@.@.@.@.@.@.@|
    *
    000001f0 00 40 00 40 00 40 00 40 00 40 00 40 00 40 55 ea |.@.@.@.@.@.@.@U.|
    00000200

    Seems that partition table didn't existed here... But it used as partitioned disk...
    I will try use testdisk.
    Last edited by rodnower; October 27th, 2012 at 10:53 PM.

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