Hitachi AMS 2100, Service Manual

Page: 79 / 192

Introduction
1–39
Hitachi AMS 2000 Family Storage System Service Guide
High-density expansion unit top view
Figure 1-38 shows the top view of the high-density expansion unit with the
drive cover removed. The disk drives and ENC cards can be seen along with
the drive fillers where disk drives are not installed. These are required to
prevent loss of cooling air to the drives.
Figure 1-38: High-density Expansion Unit Top View
Table 1-27: High-density Expansion Unit ENC LED Functions
Item Description
1
ALM
(Alarm)
RED
This LED indicates that the ENC unit has failed.
2
LOC
(Locate)
ORANGE
OFF Normal operation
Blinking
6 (slow)
Voltage on the control unit is abnormal. (Reset of the
control unit is not canceled)
1 (fast)
1
1.When blinking fast, the LED is on for 400 ms and off for 200 ms for each fast blink.
After the blinking stops, the LED ID goes off for one second.
SRAM error.
2 (fast) ENC hard error.
3 (fast) Firmware error in flash memory.
4 (fast) CUDG error in ENC.
6 (slow)
Voltage on the control unit is abnormal. (Reset of the
control unit is not canceled)
ON
Boot section error in the ENC firmware, a RAM error,
or ENC hard configuration error.