ASM rebalance operation didn't complete

Hi All,

i have added 12 disk(each 1TB) to ASM, still running it more than 30Hrs.

SQL> select * from v$asm_operation;

GROUP_NUMBER OPERA STAT      POWER     ACTUAL      SOFAR   EST_WORK   EST_RATE EST_MINUTES ERROR_CODE

------------ ----- ---- ---------- ---------- ---------- ---------- ---------- ----------- --------------------------------------------

           1 REBAL RUN          11         11    2349613    2349613       3875           0

SQL>

in the alert_log show like this.

WARNING: diskgroup compatibility limits power to 11

NOTE: membership refresh pending for group 1/0xf3ab9d16 (DATA)

Wed Feb 15 19:24:25 2017

GMON querying group 1 at 12 for pid 13, osid 1331

SUCCESS: refreshed membership for 1/0xf3ab9d16 (DATA)

NOTE: starting rebalance of group 1/0xf3ab9d16 (DATA) at power 11