IBM i Power 6, 8204 (#5590) 2780 Controller w/Aux Write Cache</p><p>Provides a disk controller with auxiliary write cache to improve cache data redundancy. #5590 includes a #2780 PCI-X RAID Disk Controller with 757MB of write cache and a secondary IOA with 1.5GB 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 system unit or I/O unit/drawer/tower. #2780 and the auxiliary write cache IOA are connected by the provided SCSI cable. Feature #2780 will not appear on IBM ordering, shipping, or inventory documentation.</p><p>The connecting SCSI cable is attached to port four of the #2780, reducing the number of SCSI buses that support disk drives from four to three. The reduction of SCSI buses may also reduce the number of disk drives supported by the #2780, depending on the system unit or I/O unit/drawer/tower in which the #2780 is installed. No disk drives are driven by the auxiliary write cache IOA.</p><p>Attributes provided: Disk Controller with auxiliary write cache</p><p>Attributes required: Two PCI-X slots within the same system unit or I/O unit/drawer/tower</p><p>For 8204-E8A: IBM i Power 6, 8204 (#5590)</p><p>Minimum required: 0</p><p>Maximum allowed: 36 (Initial order maximum: 0)</p><p>OS level required: IBM i V5R4 with V5R4M5 Machine Code, or later.</p><p>Initial Order/MES/Both/Supported: Supported</p><p>CSU: Yes</p><p>Return parts MES: Does not apply</p><p>Note: Not supported in CEC. System maximum of 48 under IBM i. Not supported under AIX or Linux.
