Encrypting the Cache Drives


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It's taken quite some time, but have finally finished applying disk encryption to all 20 drives using the 'shuffle' method.

 

But I'm not sure what the best approach would be to encrypt the cache drive(s).

I have a 4-disk cache disk configuration (4x 500gb) in btrfs.

 

I know one of these disks needs replacing soon anyway, so will I be able to ...

- Remove one of the disks from the cache array

- Install the new disk

- Format with encryption

- Add to cache array

- repeat for each subsequent disk

 

or is there a better approach?

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