Base Pci Raid Disk Unit Controller - IBM AS/400e User Handbook Manual

Magnetic Media Controllers
The #9728 does not offer support for compression. If compression is required, the #2741
should be ordered in its place. The #2741 is only supported on Models 170 and 720.

#9740 Base PCI RAID Disk Unit Controller

The #9740 is an Ultra SCSI disk and tape controller with a 4 MB write-cache that provides
RAID-5 protection for internal disk units. The #9740 is designed to control Ultra, Fast Wide,
and Fast Narrow SCSI disk and tape units that are installed in the base system unit and the
System Expansion Unit #7102. In addition to providing RAID-5 protection for disks, the #9740
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.
The #9740 controller supports a maximum of 10 drives. A minimum of four drives of the same
capacity are needed for a valid RAID-5 configuration. A maximum of two arrays are allowed
with a maximum of 10 drive allowed per array. All drives in an array must be of the same
capacity.
The #9740 also supports one CD-ROM and one internal tape unit. This feature supports
Concurrent DASD Add/Maintenance, but does not support compression. If compression is
desired, the #2748 PCI RAID Disk Unit Controller may be substituted (without credit) for the
#9740 Base controller.
The #9740 is only available on the #2407, #2408, and #2409 Dedicated Domino Server
Processors. A RAID controller does not need to be added on these processors when five or
more DASD files are ordered. Note the following additional points:
• High Speed PCI card slots required: One.
• Maximum: One. Requires V4R4.
#9767 PCI Disk Unit Controller
The #9767 is an Ultra2 SCSI disk unit and removable medial device controller.
The #9767 controller supports a maximum of six disk units and two removable media.
This feature also supports Hot Pluggable.
Refer to the card placement rules for supported systems and valid slots.
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AS/400e System Handbook