BladeCenter Storage and I/O Expansion Unit

The IBM BladeCenter Storage and I/O Expansion Unit provides direct-attach storage capacity with added I/O capability. The expansion unit supports up to five hard disk drives (RAID 0,1 embedded). Each expansion unit can also support up to three I/O expansion cards in a 30mm form factor.

Go to http://www.ibm.com/systems/bladecenter/hardware/expansion/ for more information about expansion units.