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Re: Sync two disks and hot swap

> what is the goal in having an identical copy of the disk?

It's not even so much that.

It's that the person who will be changing the disks will be hardly
capable of just that, and will not get anything close to root access to
the machine.

And I am afraid that all that complexity around automounting the
different filesystems, autounmounting, and automatically ensuring the
filesystem is clean and unmounted at the time the disk is to be swapped
could be quite unreliable.