iSeries IBM 9406, #2763 PCI RAID Disk Drive / DASD CONTROL
(#2763) PCI RAID Disk Unit Controller
(Only available as REFURBISHED as of November 21, 2003)
The #2763 is an Ultra2 SCSI controller with a 10MB write-cache that provides RAID-5 protection for internal disk units, and also supports internal tape and CD-ROM units. Available only on the Model 820, the #2763 controller supports a maximum of 12 disk units and up to two internal tape or CD-ROM units.
In addition to providing RAID-5 protection for disks, #2763 is also designed to work as a high-performance controller for disks protected by system mirroring or disks with no protection. In the RAID-5 configuration, disk unit protection is provided at less cost than mirroring, and with greater performance than system checksums.
A minimum of four disk units of the same capacity are needed for a valid RAID 5 configuration. A maximum of three arrays are allowed per controller, with a maximum of 10 disk units allowed per one array. All disk units in an array must be of the same capacity. Parity is spread across four disk units for arrays of four to ten disk units.
See the Disk Unit Table for a list of disks that can be placed into RAID-5 arrays.
Prerequisite: Available PCI slot in the system unit or #5075 tower.
Supported on the following systems: 250, 270, 520, 550, 570, 595, 810, 820, 825, 830, 840