On Jul 8, 2010, at 4:37 PM, Edward Ned Harvey wrote: >> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- >> boun...@opensolaris.org] On Behalf Of Philippe Schwarz >> >> 3Ware cards >> >> Any drawback (except that without BBU, i've got a pb in case of power >> loss) in enabling the WC with ZFS ? > > If you don't have a BBU, and you care about your data, don't enable > WriteBack. > > If you enable writeback without a BBU, you might as well just disable ZIL > instead. It's more effective, and just as dangerous. Actually, disabling > the ZIL is probably faster *and* safer than running WriteBack without BBU.
ZIL and data loss are orthogonal. As long as the device correctly respects the (nonvolatile) cache flush requests, then the data can be safe. -- richard -- Richard Elling rich...@nexenta.com +1-760-896-4422 ZFS and NexentaStor training, Rotterdam, July 13-15, 2010 http://nexenta-rotterdam.eventbrite.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
