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IBM 5580 2780 Ctlr w/Aux Write Cache

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 Product Description

IBM 5580 2780 Ctlr w/Aux Write Cache

  • SCSI RAID controller
  • 757MB Cache

IBM 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.

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