HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Glossary
265HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service 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 that the array 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 HSG60 and HSG80
controllers of the HP StorageWorks family of controllers are all array controllers.
data center cabinet (rack)
A generic reference to large subsystem racks, such as those in which HP 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 is made part of a controller configuration; that is, a physical
device that is known to the array controller. Units (virtual disks) can be created from devices,
once the devices have been made known to the array 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.