Hitachi AMS 2100, Service Manual

Page: 55 / 192

Introduction
1–15
Hitachi AMS 2000 Family Storage System Service Guide
There are no switches on an expansion unit. Power is turned on and off with
a control signal that is routed from the base unit via the ENC cables that are
connected to the ENC unit in the expansion unit.
Figure 1-12: Front View of an Expansion Unit
Figure 1-13 shows the front of an expansion unit (factory designation
RKAK) with the decorative bezel removed and the disk drives in the front
of the array exposed.
Figure 1-13: Expansion Unit Front View, Bezel Removed
Table 1-8: Expansion Unit Front View, Bezel Removed
Item Description Item Description Item Description
1
Disk Drives, showing
the status LEDs
2
Locate LED
3
Power LED