Replacing a Host I/O Board or Host I/O Module 10–5
Hitachi Unified Storage Hardware Service Guide
Replacing a Host I/O Module on a CBL Controller Box
To replace a Host I/O Module on CBL Controller Boxes:
1. Loosen one blue screw that secures the Host I/O Module, and then pull
the lever open. When the lever is opened completely, the Host I/O
Module can be removed.
2. Pull out and remove the Host I/O Module.
3. Place the removed Host I/O Module in a temporary location where anti-
static measures are observed.
4. Wait at least 30 seconds, and then install the new Host I/O Module. If
you insert the Host I/O Module without waiting at least 30 seconds, the
controller might not recover normally. If this occurs, remove the inserted
Host I/O Module from the storage system, wait at least 30 seconds and
then re-insert it into the storage system.
5. Push the Host I/O Module into the slot, with its levers opened
completely.
6. Close the lever and tighten the blue screw you loosened earlier to secure
the Host I/O Module.
7. Be sure the red STATUS LED on the Host I/O Module goes OFF and the
orange WARNING LED on the front side of the Controller Box is OFF.
8. Be sure the orange WARNING LED on the front side of the Controller
Box is OFF. If it blinks slowly, visit the HDS Support Portal at
portal.hds.com. The controller usually recovers in about three minutes;
however, if the I/O load from the host computer is high, it may take
about 30 minutes to recover.
9. Connect all the cables you removed.
10.Confirm that the green READY LED on the front of the Controller Box is
ON. This LED might blink quickly for 40-to-60 minutes or 80-to-180
minutes when the DBW is connected to the CBL before the LED goes ON.
11.In Storage Navigator Modular 2, check the recovery after replacing
components (see Checking recovery after replacing components on
page 3-14).
NOTE: When connecting Fibre Channel interface cables, insert the cables
until they are securely connected to the host connectors. If the Fibre
Channel interface cables are inserted half way into the host connectors, the
controller detects Fibre Channel failures and I/O processing can deteriorate
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