Managing Serviceguard 13th Edition, February 2007

Troubleshooting Your Cluster
Replacing I/O Cards
Chapter 8 353
Replacing I/O Cards
Replacing SCSI Host Bus Adapters
After a SCSI Host Bus Adapter (HBA) card failure, you can replace the
card using the following steps.
Normally disconnecting any portion of the SCSI bus will leave the SCSI
bus in an unterminated state, which will cause I/O errors for other nodes
connected to that SCSI bus, so the cluster would need to be halted before
disconnecting any portion of the SCSI bus. However, it is not necessary to
bring the cluster down to do this if you are using a SCSI configuration
that allows disconnection of a portion of the SCSI bus without losing
termination.
SCSI bus configurations using SCSI inline terminators or Y cables at
each node, or using a SCSI device which auto-terminates its ports when
disconnected (such as the MSA30 MI), can allow online repair.
1. Halt the node. You can use Serviceguard Manager to do this, or use
the cmhaltnode command. Packages should fail over normally to
other nodes.
2. Remove the SCSI cable from the card.
3. Remove the defective SCSI card.
4. Install the new SCSI card. The new card must be exactly the same
card type, and it must be installed in the same slot as the card you
removed. You must set the SCSI ID for the new card to be the same
as the card it is replacing.
5. Attach the new SCSI card.
6. Add the node back into the cluster. You can use Serviceguard
Manager to do this, or use the cmrunnode command.