Create Diskgroup Fails

Question

Count not mount the diskgroup.
SQL> alter diskgroup stag_data mount;
alter diskgroup stag_data mount
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"STAG_DATA"
Could not add the disk, since it is not mounted. (Catch 22)
SQL> ALTER DISKGROUP stag_data add disk '/dev/rdsk/c1txxxxxxxxs6';
ALTER DISKGROUP stag_data add disk '/dev/rdsk/c1txxxxxxxxs6'
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15001: diskgroup "STAG_DATA" does not exist or is not mounted
SQL> show parameter asm_diskstring
NAME TYPE VALUE
asm_diskstring string
SQL> select name, state, type, total_mb, free_mb from v$asm_diskgroup;
NAME STATE TYPE TOTAL_MB FREE_MB
STAG_DATA DISMOUNTED 0 0
STAG_FLASH MOUNTED EXTERN 102093 102000
Oracle Metalink solution was to
1) Drop and recreate the raw devices.
Note: Recreate the raw devices is required in order to remove completely the ASM metadata.
dd if=/dev/zero of=/dev/rdsk/<device_name> bs=1024 count=100
dd if=/dev/zero of=/dev/rdsk/<device_name> bs=8192 count=2560
But this did not fix this issue. Any Thoughts
Thanks
-Prasad

Answer 1

How do i remove invalid disk names and where is this info stored in the ASM.
export ORACLE_SID=+ASM1
SQL> startup
ASM instance started
Total System Global Area 130023424 bytes
Fixed Size 2028368 bytes
Variable Size 102829232 bytes
ASM Cache 25165824 bytes
ORA-15032: not all alterations performed
ORA-15024: discovered duplicately numbered ASM disk 0
SQL> select name, state, type, total_mb, free_mb from v$asm_diskgroup;
NAME STATE TYPE TOTAL_MB FREE_MB
STAG_DATA DISMOUNTED 0 0
STAG_FLASH MOUNTED EXTERN 102093 101759
SQL> alter system set asm_diskstring='/dev/rdsk/c1t500*';
System altered.
SQL> alter diskgroup stag_data mount;
Diskgroup altered.
SQL> select name, state, type, total_mb, free_mb from v$asm_diskgroup;
NAME STATE TYPE TOTAL_MB FREE_MB
STAG_DATA MOUNTED EXTERN 95625 92541
STAG_FLASH MOUNTED EXTERN 102093 101759
Now i want to drop the invalid member of the diskgroup. But could not drop it.
SQL> ALTER DISKGROUP STAG_DATA drop DISK '/dev/rdsk/c0t50060E800043A501d247s6';
ALTER DISKGROUP STAG_DATA drop DISK '/dev/rdsk/c0t50060E800043A501d247s6'
ERROR at line 1:
ORA-01948: identifier's name length (35) exceeds maximum (30)
SQL> ALTER DISKGROUP STAG_DATA drop DISK 'c0t50060E800043A501d247s6';
ALTER DISKGROUP STAG_DATA drop DISK 'c0t50060E800043A501d247s6'
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15054: disk "C0T50060E800043A501D247S6" does not exist in diskgroup
"STAG_DATA"
SQL> shutdown
ASM diskgroups dismounted
ASM instance shutdown
SQL> startup
ASM instance started
Total System Global Area 130023424 bytes
Fixed Size 2028368 bytes
Variable Size 102829232 bytes
ASM Cache 25165824 bytes
ORA-15032: not all alterations performed
ORA-15024: discovered duplicately numbered ASM disk 0
Diskgroup is invalid on every reboot. Where is this info stored in ASM
Thanks
-Prasad