IBM 9406-5580 provides a disk controller with auxiliary write cache to improve cache data redundancy. The #5580 includes a #2780 PCI-X Ultra4 RAID Disk Controller and a secondary IOA with 757MB of auxiliary maximum compressed write cache. The #2780 and the secondary IOA each require one PCI-X slot and must be installed together in the same CEC or I/O unihttp://www.perfdata.com/images/T/drawer/tower. The #2780 and the auxiliary write cache IOA are connected by a SCSI cable (provided).
