Specifications

86 IBM Power 770 and 780 Technical Overview and Introduction
Figure 2-26 shows the back view of the expansion unit.
Figure 2-26 PCI-X DDR 12X Expansion Drawer rear side
2.10.2 12X I/O Drawer PCIe
The 12X I/O Drawer PCIe is a 19-inch I/O and storage drawer. It provides a 4U-tall (EIA units)
drawer containing 10 PCIe-based I/O adapter slots and 18 SAS hot-swap Small Form Factor
disk bays, which can be used for either disk drives or SSD (#5802). The adapter slots use
blind-swap cassettes and supports hot-plugging of adapter cards.
A maximum of two #5802 drawers can be placed on the same 12X loop. Feature #5877 is the
same as #5802 except that it does not support any disk bays. Feature #5877 can be on the
same loop as #5802. Feature #5877 cannot be upgraded to #5802.
The physical dimensions of the drawer are 444.5 mm (17.5 in.) wide by 177.8 mm (7.0 in.)
high by 711.2 mm (28.0 in.) deep for use in a 19-inch rack.
A minimum configuration of two 12X DDR cables, two AC power cables, and two SPCN
cables is required to ensure proper redundancy. The drawer attaches to the host CEC
enclosure with a 12X adapter in a GX++ slot through 12X DDR cables that are available in
various cable lengths:
򐂰 0.6 m (#1861)
򐂰 1.5 m (#1862)
򐂰 3.0 m (#1865)
򐂰 8 m (#1864)
The 12X SDR cables are not supported.
12X Port 1
(P1-C7-T2)
P1-C8-T3 P1-C1
P1-C2
P1-C3 P1-C4
P1-C5
P1-C6
12X Port 0
(P1-C7-T1)
E1
E2
SPCN 0
(P1-C8-T1)
SPCN 1
(P1-C8-T2)