Promise Technology FASTTRAK SX4300 - Manual (Page 21)

Chapter 3: FastBuild™ Utility
15
View Drive Assignments
From the Main Menu screen, press 1 to see the View Drive Assignments screen
(below).
This screen reports disk drive assigments and provides the following information:
Channel: ID – Shows the FastTrak Controller channel ID (SX4300, 1 through 4;
SX8300, 1 through 8) to which a particular disk drive is attached.
Drive Model – Identifies the manufacturer, model, and model number (if
applicable) of each disk drive.
Capacity (MB) – Reflects the capacity in MB (megabytes) of the disk drive.
Assignment – This field identifies the logical drive to which the disk drive
belongs. In the example above, there is one logical drive composed of three disk
drives. LD 1-2 means logical drive 1, disk drive 2.
Unassigned drives are labeled free and are considered hot spares to provide
fault tolerance. Unassigned drives may also be used to create a new logical drive
at any time.
Extent – An extent is a portion of the disk drive. The FastTrak SX Series
controller allows you to split the capacity of a disk drives between two logical
drives. The portion of a disk drive available to be used in a logical drive is called
an extent. The extent, or sum of two extents, is slightly smaller than the total
capacity of the disk drive.
See “View Drive Assignments, Split Disk Drives” on page 20 for an example of
two extents for each disk drive.