How can I prove Fast Mirror Rebuilds rebuild my entire mirror volume?

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Fast Mirror Rebuilds happen so quickly that users often wonder whether all their mirror volumes contain the same data. If your 2 terabyte volume rebuilds in 10 – 20 minutes, you might think that some parts of the volume weren’t rebuilt correctly.

We added the volume validate function to SoftRAID for just this purpose. When validating a mirror volume, SoftRAID checks every sector from each of the disks in the volume to ensure the data is correct. We used the volume validate feature extensively when we were testing the Fast Mirror Rebuild code to ensure that it was rebuilding mirror volumes correctly. Read more about validating mirror volumes in the section below.

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