IBM 9406-5580 > 2780 Ctlr w/Aux Write Cache - System > 9405, 9406, 9407, 9408, 9409, 9411 - FRU > 39J0686, 39J5061, 39J5584 - Feature > IBM 5580

(#5580) - 2780 Ctlr w/Aux Write Cache

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 unit/drawer/tower. The #2780 and the auxiliary write cache IOA are connected by a SCSI cable (provided). Feature #2780 will not appear on IBM ordering, shipping, or inventory documentation.

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 CEC or I/O unit/drawer/tower in which the #2780 is installed. No disk drives are driven by the auxiliary write cache IOA.

• Attributes provided: Disk Controller with auxiliary write cache
• Attributes required: Two PCI-X slots within the same CEC or I/O unit/drawer/tower

Option Part Numbers

• 39J0686
• 39J5061
• 39J5584

Option Model Support

• 9405-5580
• 9406-5580
• 9407-5580
• 9408-5580
• 9409-5580
• 9411-5580

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