My zpool is comprised of 4 mirrors. I want to increase the size of the pool by replacing the 1.5tb disks in one of the mirrors with 4tb disks. I've read that I can replace one of them, wait for resilver, replace the other, wait for resilver again, and then the available space to the pool will increase (in this case by 2.5tb).
Do I understand the process correctly? Is this known to work (or not) in HEAD or a recent version?
Thanks,
Alan