Adaptec 2110S User Manual page 143

Adaptec Storage Manager Pro User's Guide
LUN
Stands for logical unit number. The number assigned to a subdevice
(logical unit) of a SCSI device. Each SCSI device can contain up to
eight subdevices numbered 0 through 7; however, most SCSI
devices contain only one subdevice (LUN 0).
M
management set
Group of two or more systems on your network that can use Storage
Manager Pro to manage each other's storage devices.
mirror set (RAID 1)
An array type made up of two equal-sized partitions that reside on
two different drives. A mirror set stores and maintains the same
(redundant) data in each of the two partitions. See also partition;
redundancy.
multilevel array
An array that contains other arrays. See also array; stripe set of
mirror sets (RAID 0/1); stripe set of RAID 5 sets (RAID 0/5).
P
parity
A form of error checking redundancy used to re-create the data of a
failed disk in a RAID 5 set. See also RAID 5 set; redundancy.
partition
A contiguous area of a physical drive that makes up some or all of
an array. These partitions are created and managed by the controller
as by-products of array creation. That is, when the controller creates
an array, the controller automatically converts free space on a drive
into one or more array partitions. The partitions discussed here are
not the same as partitions created by an operating system. File
system partitions are subsets of the logical space presented to the
operating system by the array. See also array; free space.
R
RAID 0
See stripe set (RAID 0).
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