DragonFly bugs List (threaded) for 2009-04
Re: Hammer, usb disk, SYNCHRONIZE CACHE failure
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
> I'm not sure what's going on here. HAMMER does issue a synchronize
> 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 think there are devices that claim to support this operation but in
reality do not support it. Or something like this. FreeBSD has a quirk file
for this. For example my Seagate USB disk always prints those synchronize
cache failure messages on FreeBSD. Look out for NO_SYNCHRONIZE_CACHE
in this file: