Adaptec RAID 2100S Software User's Manual page 63

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When you are finished creating arrays, exit Storage Manager.
You are prompted to save the configuration changes. If you
save the configuration, the build operation starts
automatically. If you have created multiple arrays, they are
built one at a time in the order created. You can also start the
build without exiting Storage Manager by selecting File–Set
System Configuration.
Note: The array initialization process can take several hours
to complete. You can exit Storage Manager and perform
other activities on the system while the build continues.
Arrays can be accessed while the initialization occurs as a
background task.
Furthermore, redundant arrays provide redundancy
immediately although the performance of the array will be
less than optimal until the initialization is complete.
RAID 1 arrays are created by copying the data on one drive of the
mirrored pair to the other. If you have specified a RAID 1 array, you
are prompted to select the direction of the copy as shown in
Figure 3-11.
Figure 3-11. Mirroring Drives in an Array
Storage Manager
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