GV$HVMASTER_INFO definition in Oracle Database 11.2
GV$HVMASTER_INFO
select
inst_id, -- INST_ID NUMBER
KJDRHVID, -- HV_ID NUMBER
KJDRHVCMAS, -- CURRENT_MASTER NUMBER
KJDRHVPMAS, -- PREVIOUS_MASTER NUMBER
KJDRHVRMCNT -- REMASTER_CNT NUMBER
from
x$kjdrhv