kern/124670: large file operation on RAID cause many GEOM errors - crash

[Remko Lodder]

On Thu, June 19, 2008 11:33 pm, Chameeya Software Services Ltd. wrote:
>
>> Date: Tue, 17 Jun 2008 19:30:04 +0000> To: freebsd-bugs at FreeBSD.org>
>> From: remko at elvandar.org> CC: > Subject: Re: kern/124670: large file
>> operation on RAID cause many GEOM errors - crash> > The following reply
>> was made to PR kern/124670; it has been noted by GNATS.>
>
> Still no luck getting a debugging kernel..I don't really know how to build
> and install it.
>
> Could this problem be caused by the "can't use BIOS geometry, using more
> likely geometry" issue when first partition the disks.
>
> My BIOS doesn't appear to contain any information on any of the disks
> (even the IDE one)..unless I miss something or it scrolls by too fast for
> me.
>
> I've plenty of power I believe. Over 17A for the four drives (1 IDE, 2
> SATA, 1 CD-RW)
>
> Can't quite figure it out. It seems okay to run for four hours doing a
> rebuild, so both disks being quite busy. But the mirror fails when I touch
> this 2 Gig file. Some type of meta-data update issue? corrupt meta-data?
>

That's all very difficult to tell without having a backtrace or something
more insight-giving then you can offer at the moment ( I understand that
you don't know how to build the debugging kernel, though with a recent
version of FreeBSD (like 7.0-RELEASE), debugging symbols are included in
the "standarized" installation, if you put the following in /etc/rc.conf:

dumpdev="AUTO"          # Device to crashdump to (device name, AUTO, or NO).
dumpdir="/var/crash"    # Directory where crash dumps are to be stored

you should be able to get a coredump... see the developers handbook
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html

Cheers,
Remko

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