3ware 7506, FreeBSD 4.x, Maxtor Disks & SMART Problems.

From: Jason Thomson (jason.thomson_at_mintel.com)
Date: 06/14/04

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    Date: Mon, 14 Jun 2004 11:41:53 +0100
To: freebsd-stable@freebsd.org

    We have a number of FreeBSD boxes with 7506 series 3ware controllers
    (about 10 and about to buy 10 more). We are generally happy with the
    performance and reliability, but we have a few intermittent, recurring
    problems.

    With some of our boxes we are using 300GB / 320GB Maxtor Maxline II disks.

    Occasionally, a machine with these disks will lock up hard; the 3ware
    controller has stopped responding. After taking the machine offline,
    and using MAXTOR PowerMax tools to analyse the disks, it becomes clear
    that one of the disks has errors.

    I have suspicions that the Maxtor disks are raising SMART events that
    are not handled by the FreeBSD 3ware twe driver.

    Is this a plausible explanation?

    Is anyone else aware of this issue, and is there anything we can do to
    solve / work around this problem?

    (We've tried disabling SMART on the disks - but the 7506 card re-enables
    it).

    More information:

    This is happening on at least 3 machines.

    The first time it happened, we upgraded to FreeBSD 4.10-PRERELEASE
    (cvsupped May 4th). This uses the 3ware imported drivers. (We also
    applied the stability patch posted to the Stable list in a bout of straw
    clutching).

    We have since seen the same problem on two additional machines (running
    4.9-STABLE from Feb 2nd and April 4th). We haven't yet upgraded these
    machines - might do soon.

    I have sent an email to support@3ware.com - no response yet - but I only
    sent it last Friday.

    Thanks in advance,

    Jason.
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