Alright so I've added a SSD to use for cache. I used preclear and erased/clear the drive. After I added it as a cache drive and start the array. I am given the options to format the drive. However it does not format. It'll just stay as uncountable.   This is what I'm seeing in the syslog: May 5 16:32:05 Bilbo emhttp: shcmd (531): mkdir -p /mnt/cache May 5 16:32:05 Bilbo emhttp: shcmd (532): set -o pipefail ; mount -t vfat -o noatime,nodiratime /dev/sdk1 /mnt/cache |& logger M