Some of us re-use disks that were once part of an array without first removing the array information written in the disks.
FreeNAS has problems with those disks and will not allow use of those disks until the array information has be wiped away.
It is not easy to find information on the web to do just that. It sounds silly as it is a very common issue.
You have to enable kernel debug mode and then destroy the disks. The following commands are taken from Mythras.
- You can either user the Shell in the FreeNAS UI or login using SSH.
- Type in the following command :
sysctl kern.geom.debugflags=0x10 - Wipe the disks :
dd if=/dev/zero of=/dev/ada0 bs=512 count=1 - Repeat the above command for the number of disks that you need to wipe.
- Go back to FreeNAS UI and create your array normally.
Those commands were found after a few days!