Specifications

88 IBM Power 770 and 780 Technical Overview and Introduction

Figure 2-29 indicates the mode switch in the rear view of the #5802 I/O Drawer.

Figure 2-29 Disk bay partitioning in #5802 PCIe 12X I/O drawer

Each disk bay set can be attached to its own controller or adapter. The #5802 PCIe 12X I/O

Drawer has four SAS connections to drive bays. It can connect to a PCIe SAS adapter or to

controllers on the host system.

Figure 2-29 shows the configuration rule of disk bay partitioning in the #5802 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 2-30.

Table 2-30 SAS connection mappings

Note: 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-T3 P3-D15 to P3-D18 4 bays

MODE

SWITCH

#5802 12X I/O Drawer

AIX/Linux

• One set: 18 bays

•Two sets: 9 + 9 bays

• Four sets: 5 + 4 + 5 + 4 bays

IBMi

• Two sets: 9 + 9 bays

PCIe 12X I/O Drawer – SFF Drive Bays