Chapter 2. Architecture and technical overview 83
Figure 2-23 shows the rear view of the 12X I/O Drawer PCIe (FC 5802).
Figure 2-23
Rear view of the 12X I/O Drawer PCIe
2.9.3 12X I/O Drawer PCIe configuration and cabling rules
The following section gives you detailed information about the disk drive configuration, 12X
loop, and SPCN cabling rules.
Configuring the disk drive subsystem of the FC 5802 drawer
The 12X I/O Drawer PCIe, SFF disk drawer (FC 5802) can hold up 18 disk drives. The disks
in this enclosure can be organized in various configurations depending on the operating
system used, the type of SAS adapter card, and the position of the mode switch.
Each disk bay set can be attached to its own controller or adapter. Feature PCIe 12X I/O
drawer has four SAS connections to drive bays. It connects to PCIe SAS adapters or
controllers on the host systems.
Disk drive bays in the 12X I/O drawer PCIe can be configured as one, two, or four sets. This
way allows for partitioning of disk bays. Disk bay partitioning configuration can be done with
the physical mode switch on the I/O drawer.
10 PCIe cards X2 SAS connectors
12X connectors Mode switch
SPCN connectors
Remember: A mode change, using the physical mode switch, requires the drawer to be
powered off and then on.
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