Chapter 1. General description
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Figure 1-7 shows the EXP24S I/O drawer.
Figure 1-7 EXP24S SFF Gen2-bay Drawer (FC 5887) front view
1.7.4 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 12 3.5-inch
SAS disk bays with redundant data paths to each bay. The SAS disk drives or SSD drives that
are contained in the EXP12S are controlled by one or two PCIe SAS adapters that are
connected to the EXP12S with SAS cables.
Figure 1-8 shows the EXP12S I/O drawer.
Figure 1-8 EXP12S SAS Drawers rear view
1.7.5 I/O drawers and usable PCI slots
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.
The Power 750 and Power 760 servers deliver great I/O expandability. In addition to the six
PCIe Gen2 slots in the system unit, up to four 12X-attached I/O drawers (FC 5802 or
FC 5877), add up to forty PCIe Gen1 slots. This set of PCIe slots can provide extensive
connectivity to LANs, switches, SANs, asynchronous devices, SAS storage, tape storage, and
more. For example, more than 64 TB of SAS disk storage is supported.
Support: The EXP12S drawer (FC 5886) is supported on the Power 750 and Power 760
servers, but no longer orderable.