GV$ASM_FILESYSTEM definition in Oracle Database 11.2
GV$ASM_FILESYSTEM
select
xv.inst_id, -- INST_ID NUMBER
xv.name_kfvacfs, -- FS_NAME VARCHAR2(1024)
to_date( -- AVAILABLE_TIME DATE
xv.time_kfvacfs,'MM/DD/RR HH24:MI:SS','NLS_CALENDAR=Gregorian'),
xv.blksz_kfvacfs/(1024), -- BLOCK_SIZE NUMBER
decode( -- STATE VARCHAR2(13)
xv.state_kfvacfs, 0, 'NOT AVAILABLE', 1, 'AVAILABLE', 2, 'OFFLINE'),
decode( -- CORRUPT VARCHAR2(5)
xv.corrupt_kfvacfs, 1, 'TRUE', 0, 'FALSE'),
xv.numvol_kfvacfs, -- NUM_VOL NUMBER
xv.totsz_kfvacfs/(1024*1024), -- TOTAL_SIZE NUMBER
xv.totfree_kfvacfs/(1024*1024), -- TOTAL_FREE NUMBER
xv.totsnap_kfvacfs/(1024*1024) -- TOTAL_SNAP_SPACE_USAGE NUMBER
from
x$kfvacfs xv