Hi Mary, I work in what I guess you would call a "large enterprise" in the media/publications area. We use EMC Clariion and DMX for our enterprise servers, RAID 5. But we are moving to HDS (no idea how the disks are set-up on that its too new). We also have some smaller systems where the storage is on NAS (NetApp filers). For backup we use TSM. Regards Pete -- //www.freelists.org/webpage/oracle-l