In nbhba mode, all devices that are attached to QLogic 234x HBA ports are unavailable. If disk or tape devices are attached to QLogic HBAs, those devices become unavailable. They remain unavailable until you exit nbhba mode on that computer.
To determine if devices are attached to QLogic HBAs, you should examine your devices and your mounted file systems.
You can configure the QLogic HBAs on a different NetBackup media server that does not contain a QLogic HBA connected start device. Then, you can install them in the NetBackup FT media servers and configure the FT services. Afterward, you should remove the nbhba driver from the media server on which you configured the HBAs.