IBM DCS9550 1S1 - Manual (Page 41)

Installation
26 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
)
Notes 1 Drives are numbered row/column.
2 With only one active PSU the enclosure takes approximately 96 seconds to start all drives
from Power On.
3 * Denotes SES drives which should always be fitted.
2.9 Drive Carrier Configuration
2.9.1 Planning and Configuring Your Installation
2.9.1.1 System Configuration
Important Before you begin installation you should become familiar with the
configuration requirements of your DCS9550 1S1 Storage Expansion Unit.
Please refer to Section 2.1 for information on your overall system
configurations.
There must be a drive present in Bay 1/1 (drive 0) or 4/4 (drive 15) to
enable SES Communications to operate. Installing drives in both of these
bays provides redundant SES communication paths.
When planning your system configuration, please remember that:
• All DCS9550 1S1 Storage Expansion Unit drive bays must be filled with either a drive
carrier or front dummy fascia. No bays should be left completely empty.
2.9.1.2 Drive Configuration
Important After you have installed the drive carrier modules in your DCS9550 1S1
Storage Expansion Unit, please refer to Section 2.4 for configuration
information relevant to the I/O module you are installing.
Table 2–4 Drive Slot Arrangement: Enclosure Front View
Row/
Column 1/# 2/# 3/# 4/#
#/1 Drive 0* Drive 1 Drive 2 Drive 3
#/2 Drive 4 Drive 5 Drive 6 Drive 7
#/3 Drive 8 Drive 9 Drive 10 Drive 11
#/4 Drive 12 Drive 13 Drive 14 Drive 15*