MSI E7210 MasterX-FA2R User Manual page 103

because, in addition to the RAID signature, the controller may also limit the
usable capacity of each drive.
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 replac-
ing 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.
MSI Reminds You...
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.
If a global hot spare exists, all arrays that the hot spare is large enough to
Adaptec SATA RAID Utility for Intel ICH-HR
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