HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Glossary
276 HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
arbitrated loop physical address
See AL_PA.
array controller
See controller.
array controller software
See ACS.
association set
A group of remote copy sets that share selectable attributes for logging and failover.
Members of an association set transition to the same state simultaneously. For example, if
one association set member assumes the failsafe locked condition, then other members of
the association set also assume the failsafe locked condition.
An association set can also be used to share a log between a group of remote copy set
members that require efficient use of the log space.
See also remote copy set.
asynchronous
pertaining to a transmission technique that does not require a common clock
between the communicating devices.
See also synchronous.
autospare
A controller feature that automatically replaces a failed disk drive. Autospare aids the
controller in automatically replacing failed disk drives. You can enable the AUTOSPARE
switch for the failedset causing physically replaced disk drives to be automatically placed
into the spareset. Also called autonewspare.
backplane
The electronic printed circuit board into which subsystem devices are plugged—for
example, the SBB or power supply.
bad block
A data block that contains a physical defect.
bad block replacement
See BBR.
battery hysteresis
The ability of the software to allow writeback caching during the time a battery is charging,
but only if a previous down time period has not drained more than 50 percent of rated
battery capacity.