Under freenas 11 'pool status 1 of the 2 disk mirrors is listed as /dev/ada9p2 & edit doesn't work the other disk is listed as ada10p2

under freenas 11 ‘pool status’ 1 of the 2 disk mirrors is listed as /dev/ada9p2 & edit doesn’t work the other disk is listed as ada10p2 & edit does work. Both disks are listed as ‘online’