ORA-15031: disk specification '/dev/oraclasm/disks/ASMDATA10' matches no disks

Question

Hi Guru's
OS: RHEL5
DB: 11.2.0
Today i am facing a strange proble while creating Diskgroup in ASM. The scenerio is like :
I create disk partitions from 1-7 during installing 11gr2 db with grid and cretate the disk group DATA and FRA using ASMCA. but after completeing all installation db as well as grid later on i add 4 disks and start the server. and add those disk by using oracleasm create disk commad and check the disks are properly listed while checking using oracleasm listdisks
But when i try to create disk group using command prompt:-
SQL> CREATE DISKGROUP DATA1
EXTERNAL REDUNDANCY
DISK '/dev/oracleasm/disks/ASMDATA10';
I am getting error as:-
ORA-15018: diskgroup cannot be created
ORA-15031: disk specifications '/dev/oracleasm/disks/ASMDATA10' matches no disks
ORA-15014: path '/dev/oracleasm/disks/ASMDATA10' is not in the discovery set
But when i try to create the diskgroup using asmca i am able to create the disk group DATA1
why this is happening
any idea about the same
Thanks in advance.

Answer 1

SQL> SELECT NAME,PATH,STATE,MOUNT_STATUS,HEADER_STATUS,GROUP_NUMBER FROM V$ASM_DISK;
NAME PATH STATE
MOUNT_S HEADER_STATU GROUP_NUMBER
ORCL:ASMDATA7 NORMAL
CLOSED  FORMER                  0
ORCL:ASMDATA10 NORMAL
CLOSED  PROVISIONED             0
ORCL:ASMDATA8 NORMAL
CLOSED  FORMER                  0
NAME PATH STATE
MOUNT_S HEADER_STATU GROUP_NUMBER
ORCL:ASMDATA9 NORMAL
CLOSED  PROVISIONED             0
ASMDATA1                       ORCL:ASMDATA1 NORMAL
CACHED  MEMBER                  1
ASMDATA2 ORCL:ASMDATA2 NORMAL
CACHED  MEMBER                  1
NAME PATH STATE
MOUNT_S HEADER_STATU GROUP_NUMBER
ASMDATA3 ORCL:ASMDATA3 NORMAL
CACHED  MEMBER                  1
ASMDATA4                       ORCL:ASMDATA4 NORMAL
CACHED  MEMBER                  1
ASMDATA5 ORCL:ASMDATA5 NORMAL
CACHED  MEMBER                  2
NAME PATH STATE
MOUNT_S HEADER_STATU GROUP_NUMBER
ASMDATA6 ORCL:ASMDATA6 NORMAL
CACHED  MEMBER                  2