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Installing a control unit
Complete the following steps to install a control unit:
1. Ensure that you wait 20 seconds or longer after removing the control
unit.
2. When the expansion unit is connected, connect the ENC cable. When the
expansion unit is not connected, go to step 3.
NOTE:
•
When an expansion unit is connected to a control unit via ENC cables,
always leave the ENC cables connected to the control unit while
removing or installing the control unit. Otherwise, the loop will not
recover from the failure and neither will the control unit.
•
The upper control unit is upside down. Take care when connecting the
cables.
3. Insert the control unit with the right and left levers open and then close
the levers completely until you hear the lock buttons on the levers click.
After you install the new control unit, the Alarm LED on the control unit
will stay on for a few minutes until the failure has recovered.
If the control unit is inserted without waiting for 20 seconds, it is possible
that the control unit may not recover normally from a failure.
If a control unit does not recover from a failure after 10 minutes or more,
perform the dummy replacement (see Note) of the control unit which
was inserted.
If a control unit has not recovered after another 10 minutes, call Hitachi
Data Systems technical support. See the Getting Help section in the
Preface of this manual.
4. Make sure that the orange Warning LED on the front of the base unit
goes out (see Note). The control unit usually recovers in about three
minutes, but if the I/O load from the host computer is high, it may take
three minutes or more to recover.
5. Connect all of the cables to the control unit.
•
When connecting the Fibre Channel interface cables, insert the
Fibre Channel interface cables until they are completely seated in
the host connectors. If the fibre channel Interface cables are
partially inserted into the host connectors, the control unit
continues to detect the fibre channel failures, and the I/O
processing of the control unit may be deteriorated.
•
Control unit #0 is installed upside down and therefore all of the
connectors in it are also upside down. Verify the orientation of the
cable connectors when you install them.
6. Check that the green READY LED on the front of the base unit
illuminates. The green READY LED on the front of the base unit may blink
rapidly for a maximum of 30 to 50 minutes before it illuminates.
7. Check that the LED of the remote adaptor connected to the control unit
illuminates when the remote adaptor is connected.
4–30
Replacing parts
Hitachi AMS 2000 Family Storage System Service Guide
- Quick Links:
- Replacing a Control Unit
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Troubleshooting
