HP Serviceguard Replacing LAN or Fibre Channel Cards, Offline Replacement, Online Replacement

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 in-line 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.

Replacing LAN or Fibre Channel Cards

If a LAN or fibre channel card fails and the card has to be replaced, you can replace it online or offline depending on the type of hardware and operating system you are running. It is not necessary to bring the cluster down to do this.

Offline Replacement

Follow these steps to replace an I/O card off-line.

1.Halt the node by using the cmhaltnode command.

2.Shut down the system using /usr/sbin/shutdown, then power down the system.

3.Remove the defective I/O card.

4.Install the new I/O 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.

5.Power up the system.

6.If necessary, add the node back into the cluster by using the cmrunnode command. (You can omit this step if the node is configured to join the cluster automatically.)

Online Replacement

If your system hardware supports hotswap I/O cards, you have the option of replacing the defective I/O card online, using the HP-UX olrad command. The new card must be exactly the same card type as the card you removed. Serviceguard will automatically recover a LAN card once it has been replaced and reconnected to the network.

For more information, see the olrad(1m) manpage and the Interface Card OL* Support Guide which as of the date of this manual can be found at http://h20000.www2.hp.com/bc/docs/ support/SupportManual/c01916176/c01916176.pdf. See also “Removing a LAN or VLAN Interface from a Node” (page 300).

Replacing LAN or Fibre Channel Cards 327