IBM Power 720 Express, Обзор

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IBM Power 720 and 740 Technical Overview and Introduction
1.6.1 12X I/O Drawer PCIe expansion units
The 12X I/O Drawer PCIe, SFF disk (FC 5802) and 12X I/O Drawer PCIe, no disk (FC 5877)
expansion units are 19-inch, rack-mountable, I/O expansion drawers that are designed to be
attached to the system using 12x double date rate (DDR) cables. The expansion units can
accommodate 10 generation 3 blind swap cassettes. These cassettes can be installed and
removed without removing the drawer from the rack.
Figure 1-4 shows the front view of the FC 5802 12X I/O drawer.
Figure 1-4 The front view of the FC 5802 I/O drawer
The FC 5802 I/O drawer has the following attributes:
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Eighteen SAS hot-swap SFF disk bays
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Ten PCIe based I/O adapter slots (blind swap)
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Redundant hot-swappable power and cooling units
The FC 5877 drawer is the same as FC 5802 except that it does not support any disk bays.
A maximum of two FC 5802 or FC 5877 drawers can be placed on the same 12X loop. The
FC 5877 I/O drawer can be on the same loop as the FC 5802 I/O drawer. A FC 5877 drawer
cannot be upgraded to a FC 5802 drawer.
1.6.2 PCI-X DDR 12X Expansion Drawer
The PCI-X DDR 12X Expansion Drawer (FC 5796) and 7314-G30 are a 4-EIA unit tall drawer
and mounts in a 19-inch rack. FC 5796 takes up half the width of the 4 EIA rack space and
requires the use of a FC 7314 drawer mounting enclosure. The 4-EIA tall enclosure can hold
up to two FC 5796 drawers mounted side by side in the enclosure. A maximum of four
FC 5796 drawers can be placed on the same 12X loop.
Note: Mixing FC 5802 or FC 5877 and FC 5796 on the same loop is not supported. Mixing
FC 5802 and FC 5877 on the same loop is supported with a total maximum of two drawers
per loop.