I think the raid card is a re-branded LSI SCSI raid. I have LSI 21320-4x and having same problem with ZFS.
Do you have BBU on the card? You may want to disable cache flush and zil and see how it works. I tried passthrough and basically the result is same. I gave up on tuning this card with ZFS, replaced the raid card with plain 21320 SCSI hba and everything works well since. I used ZFS mirror for OS, raidz for data pool. 2 days ago, one disk in my rpool mirror was dead and I was able to easily replace it. A few weeks ago, when I ran scrub, zfs found checksum error on the now dead disk and was able to fix it. I don't buy the idea on hardware raid with ZFS anymore, let ZFS handle it for you. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
