Hitachi CBXSS - 13 Replacing the I;O Module (ENC); Precautions When Replacing the I;O Module (ENC)

13–2 Replacing the I/O Module (ENC)
Hitachi Unified Storage Hardware Service Guide
Precautions when replacing the I/O Module (ENC)
Observe the following guidelines when replacing an I/O Module (ENC)
component.
• Complete the I/O Module (ENC) component replacement within 10
minutes. Otherwise, a thermal alarm condition will stop the storage
system from operating.
• When replacing an I/O Module (ENC) component, 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 two or more I/O Modules (ENCs) must be replaced on the same
PATH:
- First replace the Controller Box (controller for CBXSS/CBXSL/CBSS/
CBSL, Drive I/O Module for CBL).
- Then replace the I/O Module (ENC) for the Drive Box.
- If replacing the I/O Module (ENC) for two or more Drive Boxes,
replace the Drive Box whose the array number is smaller.
If you encounter a problem with the CBL I/O module #0 (controller) and
the Drive I/O module, replace the CBL I/O module first and then replace
the Drive I/O module. If the problem persists after replacing the Drive
I/O Module, replace the controller.
If you encounter a problem with both the I/O Module (ENC) #1 in the
first DBS/DBL (unit #0) connected to the CBL and controller #1 in the
CBL, replace the I/O Module (ENC) #1 first and then replace the Drive
I/O Module. If the problem persists after replacing the Drive I/O Module,
replace the controller.
• If the battery system fails, recover the storage system from the battery
system failure before replacing the I/O Module (ENC).
• Store the collected simple trace information on CD-R (see Collecting
trace information on page 3-13).
Replacing the I/O Module (ENC)
To replace the I/O Module (ENC) on a DBL/DBS Drive Box:
1. Be sure the red ALM LED on the I/O Module (ENC) to be replaced is ON.
If this LED is OFF, visit the HDS Support Portal at portal.hds.com.
2. Open the right and left levers toward you.
3. When the levers are open completely, the I/O Module (ENC) can be
removed.
4. Remove the SAS (ENC) cable connected to the I/O Module (ENC) to be
replaced.