How to reset a hard drive?

Question

Hard disks

Good afternoon! When setting up server storage on NAS4FREE, I mounted hard drives with ZFS formatting, partitioned them, but messed up something, now half of the hard drive memory is lost, tied to an incomprehensible partition, it is not displayed in webguy. Since the disk without information would be easier to completely remove the markup and mount points, please tell me how to do this?

Answer 1

I could not reset the hard disk, but I was able to unmount all points and delete the pool, I found information here:
Zpool