write barrier and USB devices

Hello!

Does the usb mass storage driver support write barriers?

I think it does, since XFS doesn't complain:

---------------------------------------------------------------------
shambala:~> mount -o barrier /dev/sdb2 /mnt/daten (note barrier is default since 2.6.17, but anyway)

shambala:~> tail -f /var/log/syslog
[...]

Mar 30 15:11:59 shambala kernel: XFS mounting filesystem sdb2
Mar 30 15:11:59 shambala kernel: Ending clean XFS mount for filesystem: 

sdb2
---------------------------------------------------------------------

Regards,

Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

You should ask the usb folks that question....

Cheers,

Dave.

Dave Chinner
Principal Engineer
SGI Australian Software Group