OWC Mercury Rack Pro 4 Bay Storage Enclosure Owner's Manual page 13

13
You will see the drive begin to format. This will take up to 5
Step
minutes to complete.
14
The format has completed. You will see it report back as a
Step
healthy partition.
Complete the formatting process for the remaining drives using these
steps. You're all set!
4
Once Disk Utility opens, you will see a screen that looks similar
Step
to this - note the 4 individual hard drives shown on the left side,
all unformatted with no volumes listed.
5
Click on the first hard drive in the list that has no volume, as
Step
shown above.
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