Dell Adaptec U320 SCSI Raid 0 or 1 Controller Card - Manual (Page 50)

signature on the disk.
initialized array
An array that is ready for data reads and writes.
L
logical device
A read/write resource, such as an array or spare, that does not exist until configured by the Software Management tool.
Logical Unit Number
See LUN .
low-level format
Process performed by the drive firmware that completely removes the file system from the disk.
LUN
Stands for Logical Unit Number. The number assigned to a subdevice (logical unit) of a SCSI target. Each SCSI target
can contain up to eight subdevices numbered 0 through 7; however, most SCSI devices contain only one subdevice
(LUN 0).
M
mirroring; mirrored array
Synonym for RAID 1. Full redundancy is obtained by maintaining identical copies of data on two or more hard disks.
Mirroring provides fault tolerance with a minor performance penalty.
monitoring
The process of receiving, displaying, and logging system events.
O