Checker Found 1 New Failures: Asm Health

Use ASM Filter Driver (ASMFD) instead of raw devices or ASMLIB. It automatically enforces permissions and detects failures faster.

stat /dev/mapper/asm_data2

SELECT name, state, type, total_mb, free_mb, required_mirror_free_mb
FROM v$asm_diskgroup;

Look for MOUNTED state but with disks OFFLINE or UNUSABLE. asm health checker found 1 new failures

dd if=/dev/mapper/asm_data2 of=/dev/null bs=8192 count=1

If dd fails with "Input/output error", the disk is physically failing. Use ASM Filter Driver (ASMFD) instead of raw

The Automatic Storage Management (ASM) health check utility has identified one (1) new failure during the most recent diagnostic scan. This report outlines the nature of the failure, its potential impact, and recommended actions.

Error example: Attribute 'compatible.asm' value '19.0.0.0.0' higher than software version '12.2.0.1.0' Look for MOUNTED state but with disks OFFLINE

Fix:

ALTER DISKGROUP DATA SET ATTRIBUTE 'compatible.asm' = '12.2';