HP StorageWorks HSG80 Array Controller V8.7 Maintenance And Service Manual page 169

Glossary
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 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.
data center cabinet (rack)
A generic reference to large subsystem racks, such as those in which StorageWorks products
can be mounted.
DDL
Dual data link. The ability to operate on the CI bus using both paths simultaneously to the
same remote node.
device
In its physical form, a magnetic disk that can be attached to a SCSI bus. The term is also used
to indicate a physical device that has been made part of a controller configuration; that is, a
physical device that is known to the controller. Units (virtual disks) can be created from
devices, once the devices have been made known to the controller.
The targets, initiators, hubs, converters, adapters, and similar items interconnected to form a
SCSI bus. Connectors, expanders, and hubs do not use a SCSI bus ID. See also node and
peripheral device.
DIMM
Dual Inline Memory Module.
dirty data
The write-back cached data that has not been written to storage media, even though the host
operation processing the data has completed.
DOC
DWZZA-on-a-chip. An SYM53C120 SCSI bus extender chip used to connect a SCSI bus in
one enclosure to the corresponding SCSI bus in another enclosure.
driver
A hardware device or a program that controls or regulates another device. For example, a
device driver is a driver developed for a specific device that allows a computer to operate with
the device, such as a printer or a disk drive.
HSG80 Array Controller V8.7 Maintenance and Service Guide Glossary–3