Leaderboard

LOL. I just recently did this on my own pool, actually. There isn't a good way. You need to format the drives to do this (or use a 3rd party tool, and hope it doesn't corrupt your disk). The simplest way is to use the balancing system. Use the "Disk Space Limiter" balancer to clear out one or more disks at a time. Once it's done that (it make take a few hours or longer), remove the disk from the pool and reformat it. Re-add it and repeat until you've cycled out ALL of the disks. Specifically, the reason that I mention the Disk Space Limiter balancer is that it runs in the background and doesn't set the pool to be read only. And is mostly automated.