>>> >>>SQL> select sum(TOTAL_MB) from v$asm_diskgroup_stat; >>> >>>SUM(TOTAL_MB) >>>------------- >>> 24398576 >>> >>>Does this mean that Oracle is using on average 9 bytes per extent ? well, the math is right at 7.59, but I can't imagine the structure of the array is that simple. More likely that the entire disk group extent map is not currently mapped. But I don't know. I'm just exploring. -- //www.freelists.org/webpage/oracle-l