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2.12 External I/O enclosures
The 595 server supports three external I/O enclosures that are mounted in 19-inch racks.
These enclosures are listed in Table 2-36.
Table 2-36 External I/O enclosures
Feature
#5786
#5790
#5886
2.12.1 TotalStorage EXP24 Disk Dwr (#5786)
The TotalStorage EXP24 Disk Dwr provides 24 disk bays. The EXP24 requires 4U of
mounting space in a 19" rack and features redundant power, redundant cooling. The EXP24
uses Ultra™ 320 SCSI drive interface connections. The 24 disk bays are organized into four
independent groups of six drive bays.
Disk groups are enabled using Ultra 320 SCSI repeater cards (#5741/#5742) that are
connected to an Ultra 320 SCSI adapters. Up to four repeater cards are supported per #5786
unit.
Repeater card #5741 can be used to connect one group of six disk drives to a SCSI initiator.
Repeater card #5742 can be used to connect one group of six drives to one or two different
SCSI initiators, or it can be used to connect two groups of six drives to one SCSI initiator.
2.12.2 PCI Expansion Drawer (#5790)
The PCI Expansion Drawer (#5790) provides six full-length, 64-bit, 3.3-V 133 MHz hot-plug
PCI slots. PCI cards are mounted in blind swap cassettes that allow adapter cards to be
added/removed without opening the drawer. The PCI Expansion Drawer is connected using
the RIO-2 interface adapter (#6438). Redundant and concurrently maintainable power and
cooling is included.
The #5790 drawer mounts in a 19" rack using a Dual I/O unit Enclosure (#7307). Each Dual
I/O Enclosure supports one or two #5790 PCI Expansion drawers.
Note: The PCI Expansion Drawer (#5790) has a planned availability date of September 9,
2008.
2.12.3 EXP 12S Expansion Drawer (#5886)
The EXP 12S Expansion Drawer (#5886) provides 12 hot-swap SAS storage bays.
Redundant power supplies and two Service Managers are included in the drawer. The EXP
12S requires 2U of mounting space in a 19-inch rack. The enclosure attaches to the 595
server using a SAS controller card (#5900 or #5912), or SAS RAID controllers #5902.
100
IBM Power 595 Technical Overview and Introduction
Description
TotalStorage® EXP24 Disk Drawer
PCI Expansion Drawer
EXP 12S Expansion Drawer
Maximum
Support
per system
110
—
96
—
12
—
—
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