On 7/13/05, Jonathan De Graeve <jonathan dot de dot graeve at imelda dot be> wrote:
> umass0.... Synchronize cache failed, status ==0x4
> 

UTSL :)

from a quick google for:
umass0.... Synchronize cache failed, status ==0x4 +freebsd

...the second link
(http://lists.freebsd.org/pipermail/freebsd-bugs/2004-March/005988.html)
gives a hint that maybe the device isn't listed (specifically) in the
source for scsi_da.c

Looking at the online source here
http://fxr.watson.org/fxr/source/cam/scsi/scsi_da.c?v=RELENG4
indicates that's probably the case in your situation.

--g'luck
gm