On Tue, 5 Aug 2008, Jeremy Chadwick wrote:
On Tue, Aug 05, 2008 at 10:45:16AM -0500, Sean C. Farley wrote:
Rarely, a geli partition I have freezes a process in bufwait state.
It occurs after an ATA timeout message:
Aug 5 03:47:13 thor kernel: ad10: TIMEOUT - WRITE_DMA retrying (1 retry left)
LBA=219028637
This looks like the issue I've been tracking for months now. I'm sorry
the document isn't complete; it's an issue of time...
http://wiki.freebsd.org/JeremyChadwick/ATA_issues_and_troubleshooting
Time grows on the tree next to my money tree. :) I understand.
The geli partition resides on an Intel MatrixRAID RAID1 mirror using
the ICH9R chipset (Asus P5K-E/WIFI). Killing (even -9) the process
does not work. Rebooting is the only solution, yet the system is
unable to flush the buffers and complete a clean unmounting.
After reading my above Wiki page, I hope you consider disabling
MatrixRAID and avoiding it entirely on FreeBSD. There are patches to
address major issues which have been sitting untouched, despite
patches included, for 2+ years. Draw your own conclusions.
Yuck.
I used the on-board "RAID", so the system could dual-boot Windows XP and
FreeBSD.
Is there any way to use gmirror to mirror the entire disk with XP on one
slice and FreeBSD on another? ;) OK. I think I know that answer.
Does XP have software RAID1? I can setup XP on one slice and gmirror on
another.
Is mirroring a slice any easier today? I followed information from the
following links to do this before on my server:
http://lists.freebsd.org/pipermail/freebsd-stable/2005-February/011699.html
I forget. MatrixRAID does not destroy any data if RAID1 is disabled.
Correct?
Also, you won't be able to kill -9 a process in that state. The
kernel (or some piece of it) is hung, not the process. The fact that
a reboot is required also does not surprise me.
You *might* have been able to detach the ATA/SATA channel using
atacontrol to get access to the system, but then again it might result
in a system panic (see Wiki).
I did not feel safe even without a possible panic to detach the channels
and attach them again. Would I not suffer data loss with everything
mounted?
*snip*
Sean
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