What are the considerations when replacing an HBA host port?

You can replace a when the HBA fails.

Use these guidelines when replacing an HBA host port:

• Depending on how the host is taken offline, and registration data for the HBA host port that are no longer part of the configuration might be kept along with current reservation and registration data. Accumulation of old persistent reservation data eventually might cause the to reach the upper boundary of permitted initiator ports. The controller also might send an Insufficient Registration Resources error if another HBA host port attempts to register. The maximum number of per volume depends on your system configuration. The maximum number of registrants per volume is 512.
• To prevent an Insufficient Registration Resources error, you must remove the volume reservations and registrations of HBA host ports that are no longer included in the configuration. Remove volume reservations only during scheduled maintenance downtimes to prevent interference with cluster server operations.

Related Links:

• What is host topology?
• Restarting the Host Context Agent