From: Ross S. W. Walker Sent: May 25, 2008 08:56 > > Typically most vendors recommend a two-prong approach, keep the > database data files on a RAID5/RAID6 type array and keep the > log files on a RAID10 array. > I can not comment on "most vendors" but for the PROGRESS RDBMS RAID5 is definitely not recommended. It will work but you will see a significant reduction in performance. We strongly recommend that our clients go with RAID10 (as in RAID 1+0). In-house we only use RAID10. Just my 0.02CA. Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com