graid5 after-reboot problem

[Ivan Voras]

Dag-Erling Smørgrav wrote:
> Ivan Voras <ivoras at fer.hr> writes:
>> Is the write cache in graid5 aware of what happens on the VFS / UFS
>> layers (something like gjournal does)? Otherwise, how can you guarantee
>> consistency with write caching at the GEOM layer when there's a power
>> outage or some other system interruption?
> 
> You can't.  Google for "RAID 5 write hole" for an explanation.

It was a rhetorical question :)

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 250 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-geom/attachments/20070506/120c31c9/signature.pgp