mcclnx mcc wrote: > we have DELL 6800 server with 12 internal disks in it. O.S. is CENTOS > 4.6 and SCSI control card is PERC 4e/di. > > We plan to configure 4 disks (5,8,9,10) as RAID5 or RAID50. This > logical volume will be use as file systems and store database backup > files. > > Can anyone tell me which one is better on performance? raid50 requires 2 or more raid 5 volumes. with 4 disks, thats just not an option. for file storage (including backup files from a database), raid5 is probably fine... for primary database tablespace storage, I'd only use raid1 or raid10.