Hi Karsten, > But is this mode of operation *really* safe?
As far as I can tell it is. -The F20 uses some form of power backup that should provide power to the interface card long enough to get the cache onto solid state in case of power failure. -Recollecting from earlier threads here; in case the card fails (but not the host), there should be enough data residing in memory for ZFS to safely switch to the regular on disk ZIL. -According to my contacts at Sun, the F20 is a viable replacement solution for the X25-E. -Switching write caching off seems to be officially recommended on the Sun performance wiki (translated to "more sane defaults"). If I'm wrong here I'd like to know too, 'cause this is probably the way we're taking it in production. :) With kind regards, Jeroen -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
