Jonasn

Hello. I current have 12x 4TB drives in my array. 2 are Parity drives and 10 are pool drives. 2 of my pool drives died after I accidentally unplugged my server from my UPS. I just purchased 2 18TB drives to use as parity drives so I can start replacing some of my 4TB drives with larger sized drives in the future because I'm running out of 3.5" bays. The problem is that since I now have 2 failed drives I don't know if it's safe to switch my parity drives out with the 18TBs without losing data. Do I need to buy 2 more 4TB drives to replace the failed drives to change my parity drives or can I continue to emulate the 2 4TB drives while rebuilding parity? What would be the process for this? Edit for a visual explanation: Currently: Parity: [o] - 4TB Parity 1 [o] - 4TB Parity 2 Pool: [o] - 4TB Disk 1 [x] - 4TB Disk 2 [o] - 4TB Disk 3 [o] - 4TB Disk 4 [o] - 4TB Disk 5 [o] - 4TB Disk 6 [o] - 4TB Disk 7 [x] - 4TB Disk 8 [o] - 4TB Disk 9 [o] - 4TB Disk 10 Ideal: Parity: [o] - [new] 18TB Parity 1 [o] - [new] 18TB Parity 2 Pool: [o] - 4TB Disk 1 [o] - [swapped] 4TB Parity 1 [o] - 4TB Disk 3 [o] - 4TB Disk 4 [o] - 4TB Disk 5 [o] - 4TB Disk 6 [o] - 4TB Disk 7 [o] - [swapped] 4TB Parity 2 [o] - 4TB Disk 9 [o] - 4TB Disk 10 Thanks!