Adaptec 2110S User Manual page 37

If you are building a mirror set, you will see an additional tab,
Copy Direction. The tab displays from which disk drive the
data will be copied (from the source to the target disk drive).
You can change which disk drive to copy the data to by
clicking Copy to.
The Copy Direction tab allows you to create a mirror set with
the data from a legacy drive. When using a legacy drive, make
sure you copy from the legacy disk drive to a disk drive that is
at least as big as the legacy drive.
Caution:
You will lose all original data residing on the
target disk drive (the Copy To disk drive).
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Check each tab of the dialog box to be sure the array settings
are the way you want them.
Depending on the array type, you may have two or three tabs
of information to verify.
If you want to change the settings for the array before creating
it, click Back. The system returns to the Create Array dialog
box.
Creating an Array
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