APC RAID Subsystem SCSI-SATA II Specifications download pdf (Page 53)

Falcon II SCSI-SATA Installation and Hardware Reference Manual

Figure 4-4: Daisy Chain FALCON II Subsystems

4.3.2 Daisy Chain Procedures

1. Connect the RAID subsystem to the host computer. Use the VHDCI to

VHDCI SCSI cable that was provided in the packaging box. Attach one

end to the host computer and the other end to the SCSI IN port on the

back of the RAID subsystem.

2. Daisy chain subsystems. If you wish to connect more than one

subsystem, the extra VHDCI to VHDCI SCSI cable must be separately

purchased and installed. Attach one end of the cable to the SCSI OUT

port and the other end to the SCSI IN port in the next subsystem.

3. Assign chassis IDs. Each chassis must be assigned a unique chassis ID

before being powered on. The chassis ID for the first RAID subsystem

is 0. The chassis IDs for the subsystems connected to the first RAID

subsystem are from 1 to 16. You can assign chassis IDs through the

LCD panel on the subsystem, firmware, or RAIDWatch management

software. (See Figure 4-4)

4. Create redundant host paths. If access to data is a critical requirement,

redundant data paths to different LDs (logical drives) or logical

volumes (LVs) can be created. To do this, logical units (LDs or LVs)

are mapped to both host channels (CH0 and CH1 in Figure 4-4.) This

will ensure that if one host computer fails, the second host computer

will be able to access the logical units on that host computer.

4-4

Daisy Chain

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APC RAID Subsystem SCSI-SATA II Specifications Page 53