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  1. #1

    * 3ware - strange degrading


    I have Debian Linux (stable) on Opteron with 3ware RAID-1 on 2x160GB SATA disks (ext3 filesystems).

    # dmesg | grep 3ware
    3ware Storage Controller device driver for Linux v1.26.00.039.
    scsi0 : Found a 3ware Storage Controller at 0xbc00, IRQ: 19, P-chip: 1.3
    scsi0 : 3ware Storage Controller
    Vendor: 3ware Model: Logical Disk 0 Rev: 1.2
    3ware 9000 Storage Controller device driver for Linux v2.26.02.001.

    # dmesg | grep sda
    SCSI device sda: 312579760 512-byte hdwr sectors (160041 MB)
    SCSI device sda: drive cache: write back
    Attached scsi disk sda at scsi0, channel 0, id 0, lun 0

    PROBLEM: Array is degrading sometimes and it cannot be repair without restart. At this moment, array have degraded:

    3w-xxxx: scsi0: AEN: ERROR: Unit degraded: Unit #0.

    All 3ware manuals recommend to do 'maint remove cX pX', which goes OK. But after that, rescan of array doesn't work:

    # tw_cli maint rescan c0
    Rescanning controller /c0 for units and drives ...Done.
    Found the following unit(s): [none].
    Found the following drive(s): [none].

    So my array stay DEGRADED and I cannot do anything, but ring the support, which must restart server and manually start rebuild (from BIOS).

    # tw_cli info c0

    Unit UnitType Status %Cmpl Stripe Size(GB) Cache AVerify IgnECC
    u0 RAID-1 DEGRADED - - 149.05 ON - -

    Port Status Unit Size Blocks Serial
    p0 NOT-PRESENT - - - -
    p1 OK u0 149.05 GB 312581808 V3040ZNG

    Anybody had similar problem to this? Any advices? Sorry for my not good as I wish English.

  2. #2
    Join Date
    Oct 2002
    Manchester, UK
    Have you checked the drives are compatible with the controller?
    Rob Greenwood
    RedHat Certified, Unix Consultant

  3. #3
    I didn't. It's dedicated server. I don't have physical access to it. I'll send it to support.

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