Note: Removing a controller can cause the POWER, READY, WARNING, and
ALARM LEDs on the front panel to turn o. These LEDs return to their on
state after the storage system recovers from the controller replacement.
CBSS controller front panel LEDs (without bezel)
The following table describes the denitions of the CBSS controller front panel LEDs.
Number Item Description
1 ACT LED Green: Normal operation.
Blink green: Drive is being
accessed.
2 ALM LED Red: Drive stopped due to
a failure and can be
replaced.
3 POWER, READY, WARNING,
and ALARM LEDs
Note: When System Option
Mode 1097 is set to ON,
the WARNING LED does not
blink, even if the following
failure service information
messages (SIM) are issued:
452xxx, 462xxx, 3077xx,
4100xx, and 410100.
4 POWER ON/OFF (main
switch)
Powers the storage system.
5 Small form-factor drives The twenty-four 2.5-inch
small form factor drives are
positioned vertically. The
slots are organized from 0
to 23.
CBSS controller rear panel LEDs
The following table lists the descriptions of the CBSS controller rear panel LEDs.
CBSS controller front panel LEDs (without bezel)
Chapter 2: System controllers
Hitachi Virtual Storage Platform G350, G370 Hardware Reference Guide 17