> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Cooper Hubbell > > Regarding the writeback cache on disks, what is the recommended method > to disable the cache? Through HBA firmware, or via Solaris?
It's the same either way - You press Ctrl-R (or whatever) during bootup and disable the writeback in the perc BIOS... Or you use MegaCLI, which does the same thing from within the OS. But again, I would only recommend disabling the writeback if you have either a dedicated SSD log device (or equivalent or faster), ... Or if you disable the ZIL completely (sync=disabled property). Because if you actually have ZIL and use spindle disks for ZIL, then the writeback cache is a big improvement over nothing. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
