To be more specific:
What procedure, or what kind of hardware would you need to set up a Raid 1 with 3 drives, where one of them is cycled out to an off site location.
So set up in something like this perhaps:
A month passes: Take out HDD-3 and replace with HDD-4, now keeping HDD-3 Off-site.
I've seen this question, and it helped, but its more about ideas for getting around this.
Can the drives in a RAID 1 array be rotated?
I like this setup so that everything is automatically done for you, that is if it actually is. Because to do this the array would have to rebuild the third HDD each time it is replaced. I know its not a backup solution, I'm just looking for disaster recovery. If the drives are hot swappable, you would think you can just tell the unit to stop read/writing from HDD-3, take it out, put in HDD-4 and it will make it mirror the first 2.
Is there something special you need to do to make the unit stop using HDD-3, so you don't accidentally erase the data, and not realize yur backup is corrupted? Because with hot swap, you should be able to pull it out any time. It even looks like theres a power button for each drive in the link above.
Also, is there anything special to make it automatically rebuild the newly added drive? With 2 drives still in the array, one would think the software/hardware would know those 2 are the correct ones, not the new one. Any input would be appreciated.