14–2 Replacing the SAS (ENC) cable
Hitachi Unified Storage Hardware Service Guide
Precautions when replacing the SAS (ENC) cable
Observe the following guidelines when replacing a SAS (ENC) cable.
• When replacing a SAS (ENC) cable, the storage system must be in the
following condition:
- Firmware is not being updated.
- Controller is not being replaced.
- Any part other than the I/O Module (ENC) is not being replaced.
• If the system battery fails, recover the storage system from the battery
system failure before replacing the SAS (ENC) cable.
• For storage systems that have the Power Saving/Power Saving Plus
option, removing and inserting a SAS (ENC) cable during drive spin-up
might prevent the controller from recovering fully. If this occurs, wait
for all the drives to spin up, and then remove the SAS (ENC) cable from
the storage system, wait at least 30 seconds, and reinsert it.
Otherwise, you will have to repeat the replacement procedure.
Replacing the SAS (ENC) cable on a DBL/DBS Drive Box
To replace the SAS (ENC) cable on a DBL/DBS Drive Box:
1. Among the I/O Module (ENC) connected to the SAS (ENC) cables to be
replaced, find the right and left levers of the I/O Module (ENC) with the
largest array number. Then open the right and left levers of the I/O
Module (ENC) toward you at the same time. When the lever is open
completely, the I/O Module (ENC) can be removed.
2. Remove the SAS (ENC) cable while pulling the tab of the SAS (ENC)
cable.
3. Connect a new SAS (ENC) cable.
4. Wait at least 20, and then push the right and left levers in towards the
I/O Module (ENC) completely at the same time. If you insert the I/O
Module (ENC) without waiting at least 30 seconds, the I/O Module (ENC)
might not recover from the failure and you will have to remove the I/O
Nodule (ENC), wait at least 30 seconds, and then reinsert the module.
5. Confirm the status of the following LEDs:
- Red ALM LED on the I/O Module (ENC) is OFF.
- Green READY LED on the front of the Controller Box is ON. This
LED might blink quickly for 30-to-50 minutes, 40-to-60 minutes for
the CBL, or 80-to-180 minutes when the DBW is connected to the
CBL before the LED goes ON.
NOTE: If the cable cannot be removed easily, do not pull it by force.
Otherwise, you can damage the cable.
When installing the I/O Module (ENC), do not catch it on a SAS (ENC) cable.
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