HP storageworks HSG80 Reference Manual page 213

Glossary
container
Any entity that is capable of storing data, whether it is a physical device or a group of physical
devices. (2) A virtual, internal controller structure representing either a single disk or a group
of disk drives linked as a storageset. Stripesets and mirrorsets are examples of storageset
containers that the controller uses to create units.
See also storage unit.
controller
A hardware device that, with proprietary software, facilitates communications between a host
and one or more storage devices organized in a storage array. The HS-series of the
StorageWorks family of controllers are all array controllers.
copying
A state in which data to be copied to the mirrorset is inconsistent with other members of the
mirrorset. See also normalizing.
copying member
Any member that joins the mirrorset after the mirrorset is created is regarded as a copying
member. Once all the data from the normal member (or members) is copied to a normalizing
or copying member, the copying member then becomes a normal member. See also
normalizing member.
CSR
Control and Status Register.
DAEMON
Pronounced "demon." A program usually associated with a UNIX system that performs a
utility (housekeeping or maintenance) function without being requested or even known of by
the user. A daemon is a diagnostic and execution monitor.
data center cabinet (rack)
A generic reference to large subsystem racks, such as those in which StorageWorks products
can be mounted.
data striping
The process of segmenting logically sequential data, such as a single file, so that segments can
be written to multiple physical devices (usually disk drives) in a round-robin fashion. This
technique is useful if the processor is capable of reading or writing data faster than a single
disk can supply or accept the data. While data is being transferred from the first disk, the
second disk can locate the next segment.
HSG80 Array Controller V8.7 Command Line Interface Reference Guide Glossary–5