Hitachi AMS 2100, Service Manual

Page: 143 / 192

Replacing parts
4–37
Hitachi AMS 2000 Family Storage System Service Guide
2. If you have not already done so, put on an anti-static wrist strap and
attach the clip to the unpainted front part of the expansion unit.
3. Press the blue lock button on the end of the lock lever and pull the lever
open to unlock it. Then quickly pull outward on the lock lever as far as
you can. This unplugs the ENC unit from the expansion unit and slides it
partway out of the unit.
4. Disconnect the ENC cables from the ENC unit.
5. If removing the ENC unit on the expansion unit, slide the failed ENC unit
out of the expansion unit and set it aside.
If removing the ENC unit on the modular 2U SAS expansion unit, raise
and pull toward you the right and left levers that secure the ENC unit to
remove the ENC unit.
Installing an ENC unit
Complete the following steps to install an ENC unit.
NOTE: Replacement order
• When a controller on the base unit and an ENC unit in an expansion
unit in the same path have failed at the same time, replace the
controller first. See the Hitachi AMS 2100/2300 Storage System
Control Unit Replacement Guide for instructions to replace a control
unit.
• When two ENC units in the same path have failed, replace the ENC unit
closest to the controller first.
Figure 4-22: Replacing an ENC Unit
Table 4-19: Replacing an ENC Unit
Item Description Item Description
1
Unit
3
Anti-static Wrist
Strap
5
Anti-static Wrist
Strap Clip
2
Lock Lever
4
Expansion Unit