Adaptec 3210S User Guide - Page 121

Free Space, Partitions

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Storage Concepts ATA disk drives are identified by a disk ID displayed in the following format: 0:0 Channel Number Device ID I Channel Number-Indicates to which channel (bus) on the controller the drive is attached. I 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. Free Space Array Partition Free Space Partition Free Space Before Array Creation After Array Creation After Array Creation Before Array Creation Figure A-1. Partitions A partition cannot be used by more than one array at a time. A-3

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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