Product data

Disk Drive Module Lights
The disk drive module light (LEDs) are located on the backplane of the 2104. They are
made visible by light pipes that pass through the disk drive module.
1 Activity light: When on, this green light shows that a SCSI command is in
progress.
2 Check light: This amber light shows the following conditions:
Status of Light Meaning
Off Normal operating condition.
Permanently on One of the following conditions exists:
v If a disk drive module is present, the service aid has set Remove
(see SCSI Device Identification and Removal in Appendix A.
Additional Information for RISC Systems).
v If a disk drive module is not present, the service aid has set
Insert (see SCSI Device Identification and Removal in
Appendix A. Additional Information for RISC Systems).
v The disk drive has reported a Predictive Failure Analysis (PFA)
error. This error indicates that the disk drive has had an
excessive number of internally recovered errors.
v The disk drive module is failing.
Slow flash (two seconds on,
two seconds off)
The Check light has been set by a service aid to identify the
position of this particular disk drive module.
Figure 5. Disk Drive Module Lights
Chapter 1. Reference Information 13