Re: Linux SATA RAID FAQ

Xavier Bestel
2004-08-15T20:54:13Z

Le sam 14/08/2004 à 23:49, Alan Cox a écrit :
> > > * Caching
>
> Is it battery backed ? If it is battery backed then its useful, if not
> then it becomes less useful although not always. The i2o drivers have
> some ioctls so you can turn on writeback caching even without battery
> backup. While this is suicidal for filesytems its just great for swap..

Isn't sufficient to have it do ordered writes ? If you power your
machine off, you'll have things half-written anyway, the only thing
important with journaled filesystems (and raid5 arrays) is to have
writes staying between barriers.

Xav