HP 2120 Disk System - Manual (Page 30)

HP StorageWorks Disk System 2120 30
Isolating Faults
Table 7 lists the probable causes and solutions for problems you may detect on the
disk system. When more than one problem describes your situation, investigate the
first solution that applies. The table lists the most basic problems first and excludes
them from subsequent problem descriptions.
Erratic LED behavior on the disk system could be observed in the following
situations:
■
When a server that is connected to a Disk System 2120 is powered down or loses
power (and the disk system remains powered on)
■
When the disk system is powered up when connected to a downed server
■
When an unconnected disk system is powered up
An example of this LED behavior is the LEDs staying lit solidly. This condition is
caused by the disk system being deprived of term power when the server loses power
or is powered down. The disk system does not provide its own term power. It relies on
the host bus adapter to which it is connected for term power.
TABLE 7 Troubleshooting Table
Problem
Description LED
State
Probable Cause Solution
Disk system
fails to power
on when
installed System
power LED
is off Power cord is not plugged in. Plug in the power
cord.
The power button is not
pressed. Press the power
button.
AC breaker is tripped or AC
power source has failed. Confirm AC power
availability.
The PDU/PDRU is defective. Replace the PDU/
PDRU.
Enclosure chassis is faulty. Replace the enclosure
chassis.
System
power LED
is blinking Power supply is defective. Replace the enclosure
chassis.
Cooling fans are not spinning
at the correct speed. Replace the enclosure
chassis.
Operating
system
reports
errors on a
device Disk
module
LED is on
solid or off Use diagnostic utilities to
determine disk status. Depending on the
results, monitor or
replace disk module.