User`s guide

Glossary
ac distribution
The method of distributing ac power in a cabinet.
adapter
See SCSI signal bus converter.
ANSI
American National Standards Institute
Battery backup unit
See BBU.
BBU
Battery backup unit. StorageWorks power unit option that extends power
availability after the loss of primary ac power or a power supply to protect
against the corruption or loss of data.
Note
The BBU does not provide power for the operation of a storage device. It
only provides power for protecting data.
building block shelf
See SBB.
cold-swap
A method of device replacement that requires that power be removed from
one or more shelves in a cabinet thereby affecting other devices therein. User
applications that are not dependent upon the devices being swapped are
impacted as a result. This method is used when conditions preclude the use of
a warm-swap or hot-swap method. Normally, this method is only used when
installing or upgrading a StorageWorks subsystem.
See also warm-swap and hot-swap.
controller
A hardware/firmware device that manages communications on behalf of host
systems over the SCSI bus to devices, such as the HSC–series, HSJ–series, and
HSZ–series controllers. Controllers typically differ by the type of interface to the
host and provide functions beyond what the devices support.
Glossary–1