IBM 911x-5728 - Dual Channel SCSI RAID Enablement Card - System > 9116, 9117 - FRU > 39J1307, 39J3538, 39J5652 - Feature > IBM 5728

(#5728) - Dual Channel SCSI RAID Enablement Card

The Dual Channel SCSI RAID Enablement Card (#5728) is a bootable high performance SCSI RAID Enablement feature providing RAID 0,5, or 10 capability to select pSeries systems with the appropriate supporting integrated SCSI adapter and internal multiple disk drives or packs of drives.

To increase the data writing performance, a 40 MByte nonvolatile fast- write cache is provided as a resident part of this feature. The 40 MByte fast-write cache can provide an improvement in data throughput and response time during certain sequence write operations compared to SCSI RAID adapters without the fast-write cache. The response time and data transfer improvement will vary depending upon the data block sizes, the percentage of sequential writes, machine type/model, and application parameters.

When an array configuration is selected with the RAID Manager, the disk drives being designated as part of the array are required to be formatted to 522 byte sectors. A menu option is provided in the AIX supporting software which will reformat these disk drives prior to their usage in an array. Conversely, when a disk drive is removed from an array, a similar menu option is also provided to re-format them back to 512 byte sectors. Note: Some disk drives require that their microcode be updated to the latest level before being formatted to 522 Byte Sectors. Also, there are some disk drives which do not support being formatted to 522 Byte Sectors. The PCI-X SCSI Disk Array Manager will inform the user of these known situations when they exist.

Limitation: Even though the supporting integrated adapter with the Dual Channel SCSI RAID Enablement Card has ports that run at ultra320 SCSI speeds (up to 320 MBytes/s), the internally attached disk drives will run at a maximum SCSI bus data rate specified by that supporting system disk backplane.

• Attributes provided: Internal disk drives can be configured as an array.
• Attributes required: System with supporting integrated SCSI adapter and disk drives

Option Part Numbers

• 39J1307
• 39J3538
• 39J5652

Option Model Support

• 9116-5728
• 9117-5728

 Option Guide

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