IBM Power 720 Express, Обзор

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IBM Power 720 and 740 Technical Overview and Introduction
Table 2-23 provides an overview of the capabilities of the supported I/O drawers.
Table 2-23 I/O drawer capabilities
2.9.1 PCI-DDR 12X expansion drawer
The PCI-DDR 12X expansion drawer (FC 5796) is a 4U (EIA units) drawer and mounts in a
19-inch rack. FC 5796 is 224 mm (8.8 in.) wide and takes up half the width of the 4U (EIA
units) rack space. The 4U enclosure can hold up to two FC 5796 drawers mounted
side-by-side in the enclosure. The drawer is 800 mm (31.5 in.) deep and can weigh up to
20 kg (44 lb).
The PCI-DDR 12X expansion drawer has six 64-bit, 3.3 V, PCI-X DDR slots running at
266 MHz that use blind swap cassettes and support hot-plugging of adapter cards. The
drawer includes redundant hot-plug power and cooling.
Two interface adapters are available for use in the FC 5796 drawer:
򐂰 Dual-Port 12X Channel Attach Adapter Long Run (FC 6457)
򐂰 Dual-Port 12X Channel Attach Adapter Short Run (FC 6446)
The adapter selection is based on how close the host system or the next I/O drawer in the
loop is physically located. FC 5796 attaches to a host system unit with a 12X adapter in a
GX++ slot through SDR or DDR cables (or both SDR and DDR cables). A maximum of four
FC 5796 drawers can be placed on the same 12X loop. Mixing FC 5802 or FC 5877 and
FC 5796 on the same loop is not supported.
A minimum configuration of two 12X cables (either SDR or DDR), two AC power cables, and
two SPCN cables is required to ensure proper redundancy.
Feature
code Disk drive bays PCI slots Requirements for
Power 720 and Power 740
5796 None 6 PCI-X GX++ Dual-port 12x Channel
Attach (FC EJ04)
5802 18 SAS hot-swap disk drive bays 10 PCIe GX++ Dual-port 12x Channel
Attach (FC EJ04)
5877 None 10 PCIe GX++ Dual-port 12x Channel
Attach (FC EJ04)
Note: The attachment of external I/O drawers is not supported on the 4-core Power 720.