just swap the first full 250gb with a new one, and use the current Disk as a backup as it was for the first drive.
When my first two disks fill up, I'd like to store one off-site as a backup, and keep the other around for read-only purposes (preferably in an external drive enclosure). I'd replace those drives with fresh ones in the same RAID 1 configuration for new data.
Let me explain in a (hopefully) clearer way. Let's say I have drive A and B, which are installed internally in a RAID 1 configuration. Drive A and B fill up, so I replace them with drive C and D in the same RAID 1 configuration. Drive A will be stored off-site (in case of fire, flood, theft, etc), while drive B will be installed in an external drive enclosure for read access.
So my question is, will there be any problems moving drive B from an internal RAID 1 configuration to an external non-RAID configuration?
I've never used RAID before, so I'm just wondering if there will be any issues or problems with my plan.
Thanks for the responses.