$ volcheck -v
media was found
$ /usr/sbin/newfs -v /vol/dev/aliases/pcmem0
newfs: construct a new file system  \
 
       /vol/dev/aliases/pcmem0:(y/n)? y
mkfs -F ufs /vol/dev/aliases/pcmem0 ...
 
$ volrmmount -i pcmem0
 
media was found