Creating file system

I'm trying to create file system in lv Ctxdata but I got this message

# crfs -v jfs2 -d Ctxdata -m /Ctxfs -A yes

File system created successfully."no file created" 
2621156 kilobytes total disk space.
/etc/locks/fs/Ctxdata: No space left on device

# crfs -v jfs2 -d Ctxdata -m /Ctxfs -A yes
File system created successfully.
2621156 kilobytes total disk space.
/etc/locks/fs/Ctxdata: No space left on device
# lsvg -l datavg
datavg:
LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT
loglv00             jfs2log    1       1       1    open/syncd    N/A
fslv00              jfs2       7       7       1    open/syncd    /data
Ctxdata             jfs2       20      20      1    closed/syncd  N/A

what says df -g / ?