Re: Hammer, usb disk, SYNCHRONIZE CACHE failure

[Joe Talbott <josepht@xxxxxxxxxx>]

On Wed, Apr 08, 2009 at 10:23:09AM -0700, Matthew Dillon wrote:
> 
> :This is for 2.2-RELEASE.  I have a 2.5" drive in an external USB
> :enclosure with one big Hammer filesystem on it.  The disk is ~75GB.
> :When the daily cronjob to cleanup hammer runs it fails with these
> :errors:
> :
> :Thanks,
> :Joe
> 
>     I'm not sure what's going on here.  HAMMER does issue a synchronize cache
>     op but it should be ignoring the error.  Maybe the recovery from the 
>     unsupported synchronize cache op is causing a later write op to fail.
> 

I updated to 2.3-DEVELOPMENT and now the machine hangs at this point.
I get nothing on the serial console.  No network connectivity.  No
core dump either.  I can give you access to the machine or provide any
information you may need.

I also tried adding a quirk to scsi_da.c for my device but still get
the hang.

I can't rule out flaky hardware at this point either.

Joe