The XIOtech will allow you to change the RAID on a LUN online!...so if I were you I'd go with RAID 1+0. I have a few Magnitudes here and they do top out way to early on large transfers... great low-end stuff for OLTP though... ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jeffery Thomas Sent: Wednesday, November 08, 2006 12:34 PM To: goran bogdanovic Cc: Oracle-L@xxxxxxxxxxxxx Subject: Re: Optimal configuration of Xiotech Magnitude for RMAN backups Goran, That's is a big problem with this array, we do not have *any* cache :(