3.5.2 ServeRAID-8i The onboard SAS controller does not support any host RAID. To enable RAID support, an optional ServeRAID-8i SAS RAID controller (part 13N2227) can be installed in a dedicated slot (see Figure 3-21). Figure 3-21 ServeRAID-8i The ServeRAID-8i supports the following RAID levels for the internal disks: RAID 0 RAID 1 RAID 1E RAID 5 RAID 5EE RAID 6 RAID 10 RAID 50 RAID 60 (the x366 and x460 do not support this RAID level because it requires a minimum of eight drives) The ServeRAID-8i has the following possible stripe sizes: 16 KB, 32 KB, 64 KB, 128 KB, 256 KB, and 512 KB. The default stripe size is 64 KB. The adapter supports up to 24 logical drives. The ServeRAID-8i does not have any connectors for external SAS devices. Chapter 3. Hardware planning 123