Hitachi CBL, Hardware Service Manual

Page: 206 / 292

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.