Re: Panics after AHCI timeouts


In article <111926.10138.25387@localhost> you wrote:
> On Wed, Oct 26, 2011 at 2:27 AM, Alexander Kabaev <kabaev@gmail.com> wrote:
> > I do see timeouts on one of my Samsung ST3750330A disks and they
> > definitely do not cause any panics. The weird part in my case is that
> > disk then immediately reappears as online and mirror zpool can be
> > rebuilt by just onlining the disk with 'zpool online <pool> <disk>'
> > command.
> >
> > It seems to be happening once system has accumulated some uptime. If
> > rebooted, it keeps running for a week or two with no issues, but then
> > timeouts start to happen more or less reliably every single 24 hours.
> 
> Does it correlate with high disk activity, i.e. with periodic(8)?
> 
> On my machine, I have a feeling that timeouts occur more often
> at that point, than normally... and that they also occur when multiple
> processes access the disk simultaneously.
I have seen a panic once last week under 9 stable.  I had multiple
virtual boxes running different FreeBSD versions.  Each virtual host was
building kernels with -j4.  The host became very slow and the FreeBSD 9
virtual host paniced.  I have not been able to to duplicate the panic.

Larry

-- 
------------------------------------------------------------------------
Larry Baird                        | http://www.gta.com
Global Technology Associates, Inc. | Orlando, FL
Email: lab@gta.com                 | TEL 407-380-0220, FAX 407-380-6080
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