Adaptec 2110S - SCSI RAID Controller, User Manual, Page: 121 / 158

A-3
Storage Concepts
ATA disk drives are identified by a disk ID displayed in the
following format:
■ Channel Number—Indicates to which channel (bus) on the
controller the drive is attached.
■ Device ID—Identifies the drive on the ATA channel.
Free Space
Free space refers to the space on a disk drive that is not in use by an
array. Arrays are created from free space, therefore creating an array
reduces the amount of free space on a drive. When you delete an
array, its space is returned to free space.
Partitions
A partition is 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. See Figure A-1.
Figure A-1. Partitions
A partition cannot be used by more than one array at a time.
0:0
Channel Number
Device ID
Free Space
Free Space
Partition
Before Array Creation
After Array Creation
Array
After Array Creation
Before Array Creation
Free Space
Partition