Hello Kory, Tuesday, March 20, 2007, 4:38:03 PM, you wrote:
KW> The reason for this question is we currently have our disk setup KW> in a hardware raid5 on a EMC device and these disks are configured KW> as a zfs file system. Would it benefit us to have the disk be KW> setup as a raidz along with the hardware raid 5 that is already KW> setup too? Or with this double raid slow our performance with KW> both a software and hardware raid setup? Or would raidz setup be KW> better than the hardware raid5 setup? KW> Also if we do set the disks as a raidz would it benefit use more KW> if we specified each disks in the raidz or create them as Luns then specify the setup in raidz. RAIDZ vs. HW RAID5 - generally you can expect much worse performance for parallel random and small reads and better performance for other cases. RAIDZ on top of HW RAID5 - well, it really depends if performance hit is acceptable for you along with storage capacity. Then there's somewhat lacking hot spare support in ZFS right now. If a raidz performance is acceptable to you I would go with each disk presented as a LUN and then put raidz or raidz2 on top of it + hot spares. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
