Is it bad practice to run a 3 copy MD RAID10 array on two drives with a missing drive in place of a 2 copy MD RAID10 array on two drives to allow for the addition of a third drive in the future?
We are migrating servers and I will build a new array on the new server. The plan is to build a 3 copy array with a missing drive and leave it this way possibly for months to allow for the addition of a third drive in the future. Is this equivalent to running a 2 copy array or are there caveats to this?
Our current array is a 2 copy MD RAID10 array on two drives. We would like to add another level of redundancy but we do not have the third drive yet or the tray for it and nothing is pressing us make the purchase to implement this immediately.