I'd like to double the size of an existing RAID-6. It currently contains 12 disks and I added 12 more. When I go through the IDRAC interface, I can only see options to add them as global hotspare. I thought I could just add the disks to the array and then enlarge the partition, all without losing data.
I'm no expert on RAID so maybe I'm mistaken. I've seen that there are more RAID management options in the BIOS than in IDRAC, so maybe it needs to be done through the BIOS...? If that matters, the controller is a MegaRAID SAS-3 3108 Invader / PERC H730P and IDRAC is version 8.