DELL CERC amr RAID card beeping, dead drive? how to diagnose/fix?

From: Chris Shenton (chris_at_shenton.org)
Date: 05/29/03

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    To: current@freebsd.org, freebsd-hardware@freebsd.org
Date: 28 May 2003 23:39:04 -0400

    I have a DELL 600SC which came with a DELL CERC RAID controller. It's
    recognized by FreeBSD-CURRENT as an "amr" device even though it's got
    four ATA disk channels on it instead of the documented SCSI drives for
    the PERC controller. I have 4x WD1200JB ATA 120GB disks on it which
    have been running fine for a few months as a set of RAID-5 volumes.
    >From "dmesg":

      amrd0: <LSILogic MegaRAID logical drive> on amr0
      amrd0: 9999MB (20477952 sectors) RAID 5 (optimal)
      amrd1: <LSILogic MegaRAID logical drive> on amr0
      amrd1: 111093MB (227518464 sectors) RAID 5 (optimal)
      amrd2: <LSILogic MegaRAID logical drive> on amr0
      amrd2: 111093MB (227518464 sectors) RAID 5 (optimal)
      amrd3: <LSILogic MegaRAID logical drive> on amr0
      amrd3: 111099MB (227530752 sectors) RAID 5 (optimal)

    An hour ago, it started beeping at me. I suspect this is the CERC
    card warning me that one of the disk drives has failed and that I'd
    better do something about it. :-(

    Is there a way to diagnose it from a live system, to query which of
    the four ATA drives it thinks is dead, so I can replace it?

    (Seems to me that a WD1200JB drive should last a lot longer than a few
    months it's been running, in a properly ventilated DELL box; any ideas?)

    Anyone have experience with this CERC controller and replacing a
    drive? My biggest fear is that I haven't tested the RAID rebuild and
    that even when I do replace the failed (?) drive it won't do the
    automatic rebuild and save my data.

    Other suggestions?

    Thanks.

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