HP StorageWorks 2000fc, Reference Manual

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Glossary
The glossary defines terms and acronyms used in MSA2000 Family storage system
documentation. Definitions obtained from the Storage Networking Industry
Association (SNIA) Dictionary are indicated with “(SNIA)” at the end. For the
complete SNIA Dictionary, go to
www.snia.org/education/dictionary
.
active-active Synonym for dual active components or controllers. A pair of
components, such as the controllers in a failure tolerant storage
subsystem that share a task or class of tasks when both are functioning
normally. When one of the components fails, the other takes on the
entire task. Dual active controllers are connected to the same set of
storage devices, improving both I/O performance and failure tolerance
compared to a single controller. (SNIA)
address A data structure or logical convention used to identify a unique entity,
such as a particular process or network device.
ANSI American National Standards Institute.
API Application programming interface.
array See storage system .
block The unit in which data is stored to or retrieved from a disk. For
MSA2000 Family storage systems a block is 512 bytes, equivalent to
the size of a disk sector.
broadcast write Technology that provides simultaneous caching of write data to both
RAID controllers’ cache memory with positive direct memory access
acknowledgement (certified direct memory access).