This is on a test vm in Virutal Box.

I'm trying to setup a 5 GB hard drive and when running the 1st command cryptsetup luksFormat, is when I get the error, shown below.

modprobe dm_crypt 

lsmod | grep dm_crypt 

partprobe /dev/sdb1 ; pvs ; vgs ; lvs 

pvcreate /dev/sdb1 ; vgcreate Vol_Group02 /dev/sdb1 ; lvcreate -L +5G -n LogVol00 Vol_Group02

cryptsetup luksFormat /dev/sdb1 

Are you sure?  (Type uppercase yes):  YES 
Enter LUKS passphrase: 
Verify passphrase: 
Cannot format device /dev/sdb1 which is still in ue

Has anyone seen this before? I've created other encrypted devices ok, so I'm not sure where the error lies here.