HP Array Controller HSG V8.7 Software - Manual (Page 530)

G–4 HSG80 User’s Guide
container 1) 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 the controller uses to create units.
controller A hardware device that, with proprietary software, facilitates
communications between a host and one or more devices organized in
an array. HS family controllers are examples of 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 An acronym for control and status register.
DAEMON Pronounced “demon.” A program usually associated with a UNIX
systems 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 A generic reference to large DIGITAL subsystem cabinets, such as the
SW600-series and 800-series cabinets in which StorageWorks
components 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.
device See node and peripheral device.
differential I/O module A 16-bit I/O module with SCSI bus converter circuitry for extending a
differential SCSI bus. See also I/O module.