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Could someone interpret this server information for me please?

  • 19-12-2008 01:21AM
    #1
    AARRRGH
    Closed Accounts Posts: 12,382 ✭✭✭✭


    Hello

    I have the following information about the disk drives on one of my servers:

    Physical Disks
    hda: HL-DT-ST GCR-8240N, ATAPI CD/DVD-ROM drive
    hda: ATAPI 24X CD-ROM drive, 128kB Cache, UDMA(33)
    SCSI device sda: 143372544 512-byte hdwr sectors (73407 MB)
    sda: Write Protect is off
    sda: Mode Sense: 06 00 00 00
    SCSI device sda: drive cache: write back
    SCSI device sda: 143372544 512-byte hdwr sectors (73407 MB)
    sda: Write Protect is off
    sda: Mode Sense: 06 00 00 00
    SCSI device sda: drive cache: write back


    Could someone confirm if the above says I have one disk drive, or two disk drives, i.e. RAID?

    Thanks!


Comments

  • #2
    cgarvey
    Registered Users, Registered Users 2 Posts: 3,890 ✭✭✭cgarvey


    It's being presented as one (SCSI) disk drive anyway. Most hardware RAID will present itself as one drive (i.e. the OS doesn't know anything about the RIAD part; it's all handled by the hardware RAID card).

    So either you have 1 75 GB SCSI drive, or a RAID array (of any level) with 75GB available storage. If you do lspci, you might see the RAID hardware adaptor (Adaptec, 3Ware, etc.) to confirm.


  • #3
    AARRRGH
    Closed Accounts Posts: 12,382 ✭✭✭✭AARRRGH


    lspci worked a treat. Thanks!


  • #4
    AARRRGH
    Closed Accounts Posts: 12,382 ✭✭✭✭AARRRGH


    Another question, if you don't mind. Is there any way I can inspect the contents of the second drive? Basically I'm a bit paranoid it may not be mirroring the contents of my main drive.

    Any pointers appreciated.

    Thanks!


  • #5
    cgarvey
    Registered Users, Registered Users 2 Posts: 3,890 ✭✭✭cgarvey


    Not that I'm aware of, no. It won't be a normal "drive" per se. You can't mount the 2 drives and see contents (because it's all RAID gobbeldy gook).

    You can use a RAID management utility (or RAID BIOS util) to report on the drives' status (and the health of the array in general), and/or run sanity tests on the array (although most tests disable the array during these tests; a problem if your OS is on the array!). After that, you have to trust that the RAID controller is doing its job and reporting correctly.

    Generally, the utility is manufacturer-specific, and can even be RAID controller-specific. I'd be surprised if it wasn't installed on your server. Just google the controller make/model and find out about its command line util.


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