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IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
A maximum of two FC 5802 drawers can be placed on the same 12X loop. Feature FC 5877
is the same as FC 5802, except it does not support disk bays. Feature FC 5877 can be on the
same loop as FC 5802. Feature FC 5877 cannot be upgraded to FC 5802.
The I/O drawer has the following attributes:
Eighteen SAS hot-swap SFF disk bays (only FC 5802)
Ten PCI Express (PCIe) based I/O adapter slots (blind-swap)
Redundant hot-swappable power and cooling units
1.6.3 EXP12S SAS Drawer
The EXP12S SAS Drawer (FC 5886) is a 2 EIA drawer and mounts in a 19-inch rack. The
drawer can hold either SAS disk drives or SSD. The EXP12S SAS drawer has twelve 3.5-inch
SAS disk bays with redundant data paths to each bay. The SAS disk drives or SSDs that are
contained in the EXP12S are controlled by one or two PCIe or PCI-X SAS adapters that are
connected to the EXP12S with SAS cables.
1.6.4 EXP 24S SFF Gen2-bay Drawer
The EXP24S SFF Gen2-bay Drawer is an expansion drawer that supports up to twenty-four
2.5-inch hot-swap SFF SAS HDDs on POWER6 or servers in 2U of 19-inch rack
space. The EXP24S bays are controlled by SAS adapters/controllers attached to the I/O
drawer by SAS X or Y cables.
The SFF bays of the EXP24S are different from the SFF bays of the system units
or 12X PCIe I/O drawers (FC 5802 and FC 5803). The EXP24S uses Gen2 or SFF-2 SAS
drives that physically do not fit in the Gen1 or SFF-1 bays of the system unit or
12X PCIe I/O Drawers, or vice versa.
1.6.5 EXP30 Ultra SSD I/O Drawer
The enhanced EXP30 Ultra SSD I/O Drawer (FC EDR1) provides the IBM Power
770 and 780 up to 30 solid-state drives (SSD) in only 1U of rack space without any PCIe slots.
The drawer provides up to 480,000 IOPS and up to 12.6.2 TB of capacity for AIX or Linux
clients. Plus up to 48 additional hard disk drives (HDDs) can be directly attached to the Ultra
Drawer (still without using any PCIe slots) providing up to 43.2 TB additional capacity in only
4U additional rack space for AIX clients. This ultra-dense SSD option is similar to the Ultra
Drawer (FC 5888), which remains available to the Power 710, 720, 730, and 740. The EXP30
attaches to the 770 or 780 server with a GX++ adapter, FC 1914.
1.6.6 I/O drawers and usable PCI slot
The I/O drawer model types can be intermixed on a single server within the appropriate I/O
loop. Depending on the system configuration, the maximum number of I/O drawers that is
supported differs.
Mixing: Mixing FC 5802 or 5877 and FC 5796 on the same loop is not supported.
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