Drop the damaged disk from the ASM diskgroup to allow ASM to rebalance data to surviving disks. Command: ALTER DISKGROUP DROP DISK ; 4. Preventing Future Failures To minimize "1 New Failure" alerts: Monitor Disk IO: Regularly query v$asm_disk_iostat . why it happens
You can locate the ASM alert log in the following directory: ALTER DISKGROUP <
SQL> ALTER DISKGROUP <disk_group_name> DROP DISK 'disk_name'; SQL> ALTER DISKGROUP <disk_group_name> ADD DISK '/dev/oracleasm/disks/disk_path';