5
Troubleshooting the SA7x
This chapter explains how to troubleshoot the SA7x enclosure.
For complete information about troubleshooting RA7x disk drives, see the
RA7x
Disk Drive Service Manual
. For instructions on removing and replacing field
replaceable units (FRUs), see Chapter 7.
5.1 Identifying Problems
Table 5–1 lists the problems you might encounter with the SA7x enclosure. It
also refers you to the section in this chapter that explains how to troubleshoot
each problem.
Table 5–1 SA7x Problems and Troubleshooting References
Problem
Refer to
The entire enclosure is dead; the power supply Fault indicator is
lit.
Section 5.2.1
The entire enclosure is dead; the power supply Fault indicator is
not lit.
Section 5.2.2
A drive power indicator flashes.
Section 5.3
A drive shows excessive errors or displays a fault on the OCP.
Section 5.4
A drive is not ‘‘visible’’ to the controller.
Section 5.6
The OCP indicators are not lighting, a drive does not respond to
OCP commands, or the unit number changes after power-up.
Section 5.7
5.2 Troubleshooting a Dead Enclosure
A dead enclosure is usually caused by a power supply problem. Such a problem
can have two different indications. In one case, the Fault indicator is lit; in the
other, the Fault indicator is off. The following sections describe the procedures
for troubleshooting each of these problems.
5.2.1 If the Fault Indicator Is Lit
If the SA7x enclosure is dead and the power supply Fault indicator is lit, turn
off the Master On/Off switch located on the rear of the power supply. Check for
airflow obstructions. Also check whether the enclosure has been exposed to an
overtemperature condition at the operating site.
If the enclosure has been exposed to an overtemperature condition:
1. Allow the enclosure to cool, and then turn it back on.
Troubleshooting the SA7x 5–1
