Instruction manual

Before Exchanging a Disk Drive Module
1. Use the system error log to identify the faulty disk drive module. “Appendix A.
Operating with RISC Systems” on page 81 describes how to do this if you have a
RISC-based system.
2. Find the failing disk drive module by using the location code supplied in the error
log.
3. Use the SCSI Device Identification and Removal service aid to set Remove on the
failing disk drive module. (“Appendix A. Operating with RISC Systems” on page 81
describes how to do this if you have a RISC-based system.)
4. Check the lights on this disk drive module. (“Disk Drive Module Lights” on page 8
describes where these are, and how to see them.)
If the Check light is on, exchange the disk drive module for a new one using the
procedure described in the following section.
Chapter 3. Exchanging FRUs 37