Re: FreeBSD 5.3 freezes under heavy hdd load

From: pete wright (nomadlogic_at_gmail.com)
Date: 03/08/05

  • Next message: Eugene M. Minkovskii: "mutt working throu NFS only in read-only" 
    Date: Mon, 7 Mar 2005 23:59:25 -0800
To: cyb <"cyb."@gmx.net>

    On Tue, 08 Mar 2005 08:28:32 +0100, cyb <"cyb."@gmx.net> wrote:
    > Hello,
    >
    > from time to time my FreeBSD freezes under heavy hdd load and only a
    > hard reset will bring it back to life with fsck complaining about
    > 'Softupdate Inconsistencies'.
    >
    > I had this behaviour on 5.3-RELEASE, 5.3-RELEASE-p5 and now i have it on
    > 5.4-PRERELEASE. I am using a custom kernel with SMP enabled on a P4
    > 3.2GHz for hyperthreading. One hdd is a SATA drive and it acts fine. The
    > other hdd however is an ATA133 drive and i suspect it to be the problem,
    > since freezes only occur when it is busy (eg. copying much data from a
    > DVD/HDD to it or compiling a port). Whenever the system freezes there is
    > no warning or log entry at all.
    >
    > I used 'smartmontools' to check the drive, but there was not found
    > anything and the hdd appeared to be fully operational.
    >
    > I have 1GB (2x512MB PC3200) in the box and memtest86 was ok too.
    >
    > Could the freezes come from a faulty IDE hdd (which would mean that I
    > better get rid of it), or are there other possiblities.
    >

    A couple of things will be neccessary to help us help you. Custum
    kernel, post or link to your KERNEL_CONFIG, or better yet a dmesg.
    Also I'd suggest testing this first w/o SMP enabled (not sure if SMP
    is even that helpfull with hyper-threading IMO) and secondly test with
    AICP disabled as well. I may even go as far as running the system w/o
    SMP and hyper threading enabled for testing purposes. Doing this will
    help limit the variables at play here, and is generally considered
    good debugging practice. Finally, I would post any debugging or error
    messages your are getting in your logs as well.

    -pete 

    -- 
~~o0OO0o~~
Pete Wright
www.nycbug.org
NYC's *BSD User Group
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