I/O Drawer; Section 2.7, "I/O Drawer - IBM p5 590 System Handbook

capacity and pay for use only when needed. The smart chip is the basis for the
CoD function and verifying the data integrity of the data stored in the card.

2.7 I/O drawer

The p5-590 and p5-595 use remote I/O drawers (that are 4U) for directly
attached PCI or PCI-X adapters and SCSI disk capabilities. Each I/O drawer is
divided into two separate halves. Each half contains 10 blind-swap hot-plug
PCI-X slots and one or two Ultra3 SCSI 4-pack backplanes for a total of 20 PCI-X
slots and up to 16 hot-swappable disk bays per drawer.
A minimum of one I/O drawer (FC 5791 or FC 5794) is required per system. I/O
drawer feature number 5791 contains 20 PCI-X slots and 16 disk bays, and
feature number 5794 contains 20 PCI-X slots and 8 disk bays.
Existing 7040-61D I/O drawers may be attached to a p5-590 or p5-595 as
additional I/O drawers, if available. Only 7040-61D I/O drawers containing feature
number 6571 PCI-X planars are supported. FC 6563 PCI planars must be
replaced with FC 6571 PCI-X planars before the drawer can be attached. RIO-2
drawer interconnects is the only supported protocol (as opposed to the older
RIO) in the p5-590 and p5-595.
Only adapters supported on the p5-590 and p5-595 feature I/O drawers are
supported in 7040-61D I/O drawers, if attached. Unsupported adapters must be
removed before attaching the drawer to the p-590 and p5-595 server. The p5-590
and p5-595 only support EEH adapters when partitioned.
A maximum of eight I/O drawers can be connected to a p5-590. Each I/O drawer
contains twenty 3.3-volt PCI-X adapter slots and up to sixteen disk bays. Fully
configured, the p5-590 can support 160 PCI adapters and 128 disks at
15,000 rpm.
A maximum of 12 I/O drawers can be connected to a p5-595. Each I/O drawer
contains twenty 3.3-volt PCI-X adapter slots and up to sixteen disk bays. Fully
configured, the p5-595 can support 240 PCI adapters and 192 disks at
15,000 rpm.
A blind-swap hot-plug cassette (equivalent to those in FC 4599) is provided in
each PCI-X slot of the I/O drawer. Cassettes not containing an adapter will be
shipped with a plastic filler card installed to help ensure proper environmental
characteristics for the drawer. If additional blind-swap hot-plug cassettes are
needed, FC 4599 should be ordered.
All 10 PCI-X slots on each I/O drawer planar are capable of supporting either
64-bit or 32-bit PCI or PCI-X adapters. Each I/O drawer planar provides 10 PCI-X
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Chapter 2. Hardware architecture