panic with zfs v16 patch

Ivan Voras ivoras at
Mon Jun 28 15:36:22 UTC 2010

On 06/28/10 17:20, Sam Fourman Jr. wrote:
> On Mon, Jun 28, 2010 at 9:43 AM, Sam Fourman Jr. <sfourman at> wrote:
>>> Curious - this panic is UFS softdep-related - possibly from the SUJ work?
>>> On which file system type is your ports tree?
>> ufs2
> it seems ivan may be correct, I went and tried to continue the subversion build
> I received this panic, while downloading a file (I was doing nothing
> with ZFS at all this time)
> ===>  License check disabled, port has not defined LICENSE
> ===>  Found saved configuration for postgresql-client-8.2.17_1
> => postgresql-8.2.17.tar.bz2 doesn't seem to exist in
> /usr/ports/distfiles/postgresql.
> => Attempting to fetch from
> postgresql-8.2.17.tar.bz2                      52% of   12 MB  855 kBps
> any other useful data I can gather?

READ_DMA and WRITE_DMA errors usually indicate that your disk has bad
sectors or has become broken, but you have so many of them on multiple
drives (ad4, ad8, ad10), which might mean your disk controller is dying
or you have really bad cabling in the machine.

You might try using something like

# dd if=/dev/ad8 of=/dev/null bs=1m

to see if you can reliably provoke errors on the same part of the disk -
if not, there is certainly a problem with the controller or cabling; if
yes, it can also be a disk problem.

In any case, it looks like your problem is not related to any file
system code.

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