User Guide

4-10
Using Adaptec Storage Manager – Browser Edition
This is done because hard disk drives of apparently the same
capacity from different manufacturers, or even different models
from the same manufacturer, actually vary slightly in the true
capacity available. Although, in normal operation this is not an
issue, it can be when assigning hot spares or replacing a failed
drive.
If the controller used the maximum capacity of each drive and a
hot spare or replacement drive was just a few megabytes smaller, it
would not be able to replace the failed drive. By rounding drive
capacities down to the nearest 2 MB, this possibility is effectively
eliminated.
Logical Devices
As described earlier, when Adaptec Storage Manager loads, the
Logical Devices view is expanded and you can see the arrays
present on the controller.
At the top of this view are the following buttons: Create, Modify,
and Delete. Each button opens a wizard for the corresponding
function.
Modify allows you to:
■ Change an array from one RAID level to another
■ Expand an array
■ Change the stripe size for a RAID 0
For detailed instructions on using these buttons, refer to the online
Help.
The main area of the Logical Devices view is used to display the
arrays on this controller. It defaults to a condensed view of top-
level arrays.
Note: The Options button allows you to display second-level
arrays if your controller supports them.
In this condensed view, the RAID level of each device as well as
whether it is protected by a hot spare, is visible.