Much of the complexity in hardware RAID is in the fault detection, isolation, and management. The fun part is trying to architect a fault-tolerant system when the suppliers of the components can not come close to enumerating most of the possible failure modes.
What happens when a drive's performance slows down because it is having to go through internal retries more than others? What layer gets to declare a drive dead? What happens when you start declaring the drives dead one by one because of they all seemed to stop responding but the problem is not really the drives? Hardware RAID systems attempt to deal with problems that are not always straight forward...Hopefully we will eventually get similar functionality in Solaris... Understand that I am a proponent of ZFS, but everything has it's use. -Joel This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
