Tuning HBA capacity

Ensure that you have enough HBA bandwidth to handle peak loads on the system. When you are planning for peak loads, consider all operations that can occur simultaneously in your environment.

For example, if you are backing up to a disk pool, you need enough network bandwidth for the client backup operation. You also need a similar amount of outgoing bandwidth to disk through fibre, SAS, or other HBA for that backup data. More bandwidth is required if storage pool migration tends to run during the backup window. In addition to the bandwidth needed for the backup operation, you need bandwidth to read the data from disk and to write to tape. If you consider only the bandwidth that is needed for the backup operation, your available bandwidth is limited when storage pool migration starts.