ASMCMD [+USERDG1] > lsdg 
State    Type    Rebal  Unbal    Sector Block      AU    Total_MB   Free_MB  Req_mir_free_MB  Usable_file_MB   Offline_disks     Name   

MOUNTED  EXTERN  N      N        512    4096  1048576        8636      8571                0            8571               0     USERDG1/
MOUNTED  EXTERN  N      N        512    4096  1048576        8636      7479                0            7479               0     USERDG2/
MOUNTED  EXTERN  N      N        512    4096  1048576       17273     17222                0           17222               0     USERDG3/
MOUNTED  EXTERN  N      N        512    4096  1048576       17273     17223                0           17223               0     USERDG4/
MOUNTED  EXTERN  N      N        512    4096  1048576       17273     17223                0           17223               0     USERDG5/