On Mon, Jun 26, 2006 at 05:26:24PM -0600, Gregory Shaw wrote: > > You're using hardware raid. The hardware raid controller will rebuild > the volume in the event of a single drive failure. You'd need to keep > on top of it, but that's a given in the case of either hardware or > software raid.
True for total drive failure, but not there are a more failure modes than that. With hardware RAID, there is no way for the RAID controller to know which block was bad, and therefore cannot repair the block. With RAID-Z, we have the integrated checksum and can do combinatorial analysis to know not only which drive was bad, but what the data _should_ be, and can repair it to prevent more corruption in the future. - Eric -- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
