ASM on 10g on RHEL.
Adding 2 disks to existing diskgroup, but forgot to 'scandisk' on all nodes first, so attempt failed:
alter diskgroup FSDMODB add disk 'ORCL:FSDMODB3'
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15075: disk(s) are not visible cluster-wide
Did oracleasm scandisks on all nodes, but now add attempts return:
ORA-15020: discovered duplicate ASM disk "FSDMODB3"
and SELECT name, header_status, path FROM V$ASM_DISK; returns
'drop disk' tells me it does not exist in the diskgroup.
How do I make disk FSDMODB3 part of diskgroup FSDMODB?
If you are using oracleasm then try this
oracleasm deletedisk <devicename/diskname>
If you aren't using oracleasm then
use dd if=/dev/null of=<your device name-full path> bs=1024 count=2