Well, no; his quote did say "software or hardware". The theory is apparently that ZFS can do better at detecting (and with redundancy, correcting) errors if it's dealing with raw hardware, or as nearly so as possible. Most SANs _can_ hand out raw LUNs as well as RAID LUNs, the folks that run them are just not used to doing it.
Another issue that may come up with SANs and/or hardware RAID: supposedly, storage systems with large non-volatile caches will tend to have poor performance with ZFS, because ZFS issues cache flush commands as part of committing every transaction group; this is worse if the filesystem is also being used for NFS service. Most such hardware can be configured to ignore cache flushing commands, which is safe as long as the cache is non-volatile. The above is simply my understanding of what I've read; I could be way off base, of course. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
