#0648 PCI-X Disk Ctlr-90MB No IOP

Provides a PCI-X SCSI disk controller that has a 90MB write cache and can provide RAID-5 or RAID-6 protection of disk units.

The #0648 has two U320 SCSI buses each with a bus data rate of up to 320MBs. A maximum of 12 internal disk drives and up to two internal removable media devices (tape, optical libraries, CD-ROM, DVD-ROM, or DVD-RAM) are supported on the #0648.

A minimum of three disk drives are required for RAID-5, providing protection against a single drive failure in an array. A minimum of four disk drives are required for RAID-6, providing protection against up to two drives failing in an array.

#0648, #5737, and #5776 are physically the same adapter card but have different feature numbers to indicate to IBM configurator tools how the card is being used. #0648 indicates that the card is dedicated to an AIX 5L or Linux partition and an IOP is not being used.

Note the #2780/#5580 and #2757/#5581 disk controllers with an effective 757MB write cache provide greater disk performance and can have an auxiliary write cache IOA to protect the write cache contents.

Supported on the following systems: 520, 550, 570, 595