HP Array Controller HSG V8.7 Software - Manual (Page 189)

UltraSCSI RAID Enclosure Glossary–1
Glossary
This glossary defines terms pertaining to the DS-BA370 series
UltraSCSI RAID enclosure. It is not a comprehensive glossary for all
StorageWorks products.
ac distribution
The method of distributing ac power within a StorageWorks shelf,
enclosure, or cabinet.
ac input box
A device that receives ac power from the PDU and distributes the ac
power to all shelf power supplies connected to the ac input box power
bus.
ac power controller
See ac input box.
active
The disk drive SBB is spinning up, or down, or transferring data to or
from the array controller.
adapter
See SCSI bus signal converter.