[Bug 37382] [dapper]ata timeout freezes system partly

[tenco]

Public bug reported:

Affects: linux-source-2.6.15 linux-image-2.6.15-19-686 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
when running several instances of bonnie++ simultaneously, i get the
following error (mostly during "Rewriting..." message from bonnie++):

ata1: command 0x25 timeout, stat 0xd8 host_stat 0x21
ata1: command translated ATA stat/err 0xd8/00 to SCSI SK/ASC/ASCQ 0xb/47/00

This message gets repeated every few seconds. After that message the hd-
activity light is permanently on, i can switch consoles but everything
involving harddrive access doesn't work (including save shutdown). Only
option is a hard reset.

sometimes those error also occurs, but with no noticable effect  (mostly
occurs in packs of 3-5):

[4295874.351000] ATA: abnormal status 0x58 on port 0xDC870087

additionally (but i don't know if it's related):

[4295164.189000]     ACPI-0307: *** Error: No installed handler for
fixed event [00000000]

I don't know if this was intended, but this error leads to remounting
the root-fs readonly (which can not be reversed, so the only option is a
reboot) due to the "errors=remount-ro" flag in /etc/fstab

Filesystem is an ext3fs, installed by installing breezy 5.10 and
updating from the net (since flight5 live and install cds cannot be
booted on this system)

for dmesg and lspci output see
https://launchpad.net/distros/ubuntu/+source/linux-
source-2.6.15/+bug/20781
-- 
[dapper]ata timeout freezes system partly
https://launchpad.net/malone/bugs/37382