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Glossary
L
legacy disk
Disk that contained a valid partition table when connected to the
controller. The controller manages the disk as a legacy disk array
where there is a one-to-one logical to physical mapping of array to
disk.
logical device
Device (disk) comprised of spaces from one or more physical
drives and presented to the operating system as if it were one
drive.
logical device order
Sequence in which the system’s operating system detects the
arrays, single hard disks, and other devices connected to the
controller when the server boots.
low-level format
Process performed by the drive firmware that completely cleans
any data off the hard disk.
LUN
Logical Unit Number. The number assigned to a subdevice 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
migration
See reconfiguration.
mirror set
See RAID 1.
mirroring; mirrored array
See RAID 1.
UG.book Page 8 Saturday, October 26, 2002 12:08 PM