fwiw, I am having the same problems with the latest Natty packages.
The kernel is
Linux mythtv 2.6.37-11-generic #25-Ubuntu SMP Tue Dec 21 23:42:56 UTC 2010
x86_64 GNU/Linux
My setup is
Asus P7P55D-E LX Motherboard with the Marvell 88SE9125 SATA 3 controller
Intel i5 760 CPU
PC1333 8G RAM (4GB x 2 Corsair)
5 Sata 2 2 TB Disks
1 Sata 3 Seagate 2 TB Disk (used as the boot disk and the disk on which
everything below is being written). plugged in as SATA 3 using AHCI
1 PVR 150 Video Capture card
Asus ENGT430 Graphics Card
I'm getting a ton of
[ 5884.881538] ata9.00: failed command: WRITE FPDMA QUEUED
[ 5884.909807] ata9.00: cmd 61/08:20:f0:71:c5/00:00:73:00:00/40 tag 4 ncq 4096
out
[ 5884.909810] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
(timeout)
[ 5885.022592] ata9.00: status: { DRDY }
[ 5885.051123] ata9: hard resetting link
[ 5885.591937] ata9: SATA link up 6.0 Gbps (SStatus 133 SControl 370)
[ 5885.593771] ata9.00: configured for UDMA/133
[ 5885.593996] ata9.00: device reported invalid CHS sector 0
[ 5885.594002] ata9.00: device reported invalid CHS sector 0
[ 5885.594013] ata9: EH complete
errors in the logs. I noticed this because ivtv was outputting a ton of
"Unable to Save MPG stream" errors. I thought it was a bug in ivtv but
now I realize that it was a SATA 3 error and that the drive had become
read-only.
this has happened a few times now and the system is locked up hard each
time. It can ping but nothing is running. I had ssh access during one of
these events and nothing worked (reboot, all process were in zombie
state, etc.). which makes sense as the root drive was now read-only and
inoperable.
I've lost data because of this as well. my entire /var/lib/mysql
directory was blown away and recovered into lost+found. other
directories are there as well.
I'm going to a) switch the sata 3 drive to the sata 2 controller, and b)
reinstall ubuntu (as I'm not sure what went missing with the latest
crash). I'm a little surprised that this bug has remained through
multiple kernel revisions.
Raj
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https://bugs.launchpad.net/bugs/285892
Title:
ata1.00: exception Emask 0x0 SAct 0x807f SErr 0x0 action 0x6 frozen
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