[PANIC] ffs_alloccg: map corrupted

[Garrett Cooper]

On Wed, Dec 15, 2010 at 7:29 PM, David O'Brien <obrien at freebsd.org> wrote:
> On Thu, Dec 02, 2010 at 03:31:41PM -0800, Garrett Cooper wrote:
>> On Thu, Dec 2, 2010 at 2:43 PM, David O'Brien <obrien at freebsd.org> wrote:
>> > Thoughts?
>> >
>> > FreeBSD 9.0-CURRENT #654 r215604M: Sat Nov 20 19:51:27 PST 2010
>> >    rootk at dragon:/sys/i386/compile/DRAGON i386
>> > [..]
>> > start = 0, len = 3359, fs = /files
>> > panic: ffs_alloccg: map corrupted
> [..]
>> > ffs_balloc_ufs2(ce55e660,38000,0,4000,ce77b300,...) at 0xc0755629 = ffs_balloc_ufs2+0x1949
> [..]
>> > panic: bufwrite: buffer is not busy???
>>
>>     UFS? UFS2? SU? SU+J? Got more details :)?
>
> UFS2, SU+J, ahd(4) HBA

    Hmmm.. interesting. Was a cylinder block corrupted by an fsck and
the map not updated (properly) to reflect the change? I haven't seen
this particular issue before, but then again I stick to mfi(4)
controllers for RAIDs and standalone ahci(4) drives.
Thanks,
-Garrett