IBM ATA 133, User Manual

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Chapter 6 BIOS Configuration Utility 27
Selecting the Configuration Method,
Continued
Using New Configuration If you select New Configuration, the existing configuration information on the
selected controller is destroyed when the new configuration is saved. In New
Configuration, you can modify the following logical drive parameters:
•
RAID level
•
Stripe size
•
Cache write policy
•
Read policy
•
Cache policy
•
Logical drive size
•
Spanning of arrays
NOTE: Selecting New Configuration erases the existing configuration information on the
selected controller. To use the spanning feature and keep the existing configuration, use
View/Add Configuration.
1. Select Configure—> New Configuration from the BIOS Configuration Utility
Management Menu.
An array selection window displays the devices connected to the current controller. Hot
key information appears at the bottom of the screen. The hot key functions are:
<F2> Display drive data and error count for the selected drive.
<F3> Display the logical drives that have been configured.
<F4> Designate the selected drive as a hot spare.
<F10> Display the logical drive configuration screen.
2. Press the arrow keys to highlight specific physical drives.
3. Press the spacebar to associate the selected physical drive with the current array.
The indicator for the selected drive changes from READY to ONLINE A[array number]-
[drive number]. For example, ONLINE A2-3 means hard drive 3 in array 2.
4. Add physical drives to the current array as desired.
NOTE: Try to use drives of the same capacity in a specific array. If you use drives with
different capacities in an array, all drives in the array are treated as if they have the
capacity of the smallest drive in the array.
The number of physical drives in a specific array determines the RAID levels that can be
implemented with the array.
RAID 0 requires one or more physical drives per array.
RAID 1 requires two physical drives per array.
RAID 10 requires at least four physical drives per array.
5. Press <Enter> after you finish creating the current array.
A window entitled Select Configurable Array(s) appears. It displays the array, and array
number, such as A-00.
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