Peter Eisentraut <[EMAIL PROTECTED]> writes: > There are also other levels. One poster talked about RAID 10 which > appears to be a mirrored RAID 5.
Those are multi-level RAID systems: - RAID (0+1) RAID 1 (high availability) plus RAID 0 (enhaced I/O performace through striping). - RAID (3+0) A logical volume with several RAID 3 logical member drives. -RAID (5+0) A logical volume with several RAID 3 logical member drives. -RAID (5+1) Requires multiple RAID controllers. Each layer-1 RAID controller handles one RAID 5 logical drive and layer-2 RAID controller performs RAID 1 (mirroring) function to the virtual disks controlled by all of the layer-1 RAID controllers. - RAID (5+5) Requires multiple RAID controllers. Each layer-1 RAID controller handles one to several RAID 5 logical drives and layer-2 RAID controller performs RAID 5 to the virtual disks controlled by all of the layer-1 RAID controllers. - RAID 10 Logical volume with RAID 1 logical drives; stripping plus mirroring. - RAID 30 Logical volume with RAID 3 logical drives; RAID 3 plus striping. - RAID 50 Logical volume with RAID 5 logical drives; RAID 3 plus striping. All about RAID: "The RAID book" from the RAID Advisory Board. Regards, Manuel. ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
