User`s guide

Glossary-2
Glossary
chunk
A contiguous set of data written onto a single disk drive when a
stripe set, RAID 5 set, or stripe set of mirror sets distributes, or
stripes, data across its respective disk drives. See also RAID 5; stripe
set (RAID 0); stripe set of mirror sets (RAID 0/1); stripe set of
RAID 5 sets (RAID 50).
chunk size
See stripe size.
controller
A hardware device that performs I/O functions. Controllers also
perform other functions such as read and write caching and RAID
management. Also known as an adapter or embedded storage
controller.
controller 1 and controller 2
When an external RAID system is in active-active mode, one
controller is designated as controller 1 and the other controller is
designated as controller 2. Controller identity is determined by the
RAID appliance. Sometimes referred to as A controller and B
controller. See also storage system.
D
device
Any type of physical computer storage unit such as a disk drive,
controller, or enclosure.
device ID
See SCSI ID.
device slot
See slot.
disk array
See array.
disk drive
A physical disk drive on a SCSI bus. See also channel; disk ID; LUN;
SCSI ID.
disk ID
Unique disk identifier that consists of the channel (bus) number,
SCSI ID (also known as target ID), and LUN. For example, 1:04:0.
See also channel; LUN; SCSI ID.