88 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
Figure 2-26 indicates the mode switch in the rear view of the FC 5802 I/O Drawer.
Figure 2-26 Disk bay partitioning in FC 5802 PCIe 12X I/O drawer
Each disk bay set can be attached to its own controller or adapter. The PCIe 12X I/O drawer
(FC 5802) has four SAS connections to drive bays. It can connect to a PCIe SAS adapter or
to controllers on the host system.
Figure 2-26 shows the configuration rule of disk bay partitioning in the PCIe 12X I/O drawer.
There is no specific feature code for mode switch setting.
The SAS ports, as associated with the mode selector switch map to the disk bays, have the
mappings shown in Table 2-24.
Table 2-24 SAS connection mappings
Tools and CSP: The IBM System Planning Tool supports disk bay partitioning. Also, the
IBM configuration tool accepts this configuration from IBM System Planning Tool and
passes it through IBM manufacturing using the Customer Specified Placement (CSP)
option.
Location code Mappings Number of bays
P4-T1 P3-D1 to P3-D5 5 bays
P4-T2 P3-D6 to P3-D9 4 bays
P4-T3 P3-D10 to P3-D14 5 bays
P4-T4 P3-D15 to P3-D18 4 bays
MODE
SWITCH
1
2
4
FC 5802 12X I/O Drawer
AIX/Linux
One set: 18 bays
Two sets: 9 + 9 bays
Four sets: 5 + 4 + 5 + 4 bays
IBM i
Two sets: 9 + 9 bays
PCIe 12X I/O Drawer SFF Drive Bays
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