Run the following SQL query within the SQL*Plus environment of the affected ASM instance to identify the disk group's operational mode:
Intermittent loss of connectivity to the SAN/LUNs causes heartbeat timeout warnings (e.g., Waited 15 secs for write IO ). asm health checker found 1 new failures updated
The disk group is normal; the issue might be confined to a single disk. Run the following SQL query within the SQL*Plus