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Replacing a control unit
NOTE:
•
In the unlikely event the array power is on and both control units in a
base unit fail at the same time, replace them one at a time.
•
The system parameters are stored on an internal disk drive (one that is
not used for user data storage) and when you install a new controller,
the system parameters are automatically installed on it.
•
If you replace a control unit while a logical unit in the array is being
formatted, the restoration of the controller will be delayed until the
LUN formatting is complete.
Complete the following steps to replace a control unit:
1. Follow the troubleshooting and failure identification procedures
described in
Troubleshooting.
2. Verify that the red Alarm LED or orange Reset LED on the control unit
you are replacing is ON.
CAUTION! Do not disconnect the ENC cables from the controller
until after the controller has been disconnected from the base unit.
All other cables may be disconnected first.
3. Follow the procedure below and then the procedure titled
control unit on page
Removing a control unit
Complete the following steps to remove a control unit from a base unit. This
procedure applies to both the Fibre Channel and iSCSI controllers.
1. Label all cables that are connected to the control unit so that they are
easy to replace after the new control unit is installed.
2. If you have not already done so, put on an anti-static wrist strap.
CAUTION! Do not disconnect the ENC cables until the control unit
has been disconnected (partially removed) from the base unit.
3. Disconnect all cables except the ENC cables from the control unit.
4. Push the blue lock buttons on the lock levers to unlock them.
5. Pull outward on both lock levers to disengage the connectors in the unit.
See
4–28
Chapter 2, Identifying failed parts
4-30.
Figure
4-17.
Replacing parts
Hitachi AMS 2000 Family Storage System Service Guide
and
Chapter 6,
Installing a
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Table of Contents
Troubleshooting
