# Locate your ASM Alert log using the ADRCI tool adrci> show alert -p "message_text like '%ASM Health Checker%'" Use code with caution. 2. Verify Your Current Disk Group Status

Before making any changes, retrieve the trace file that corresponds to the background error. Look for lines right above the alert in your ASM alert log to identify the specific RBAL or GMON background trace file.

The Oracle Automatic Storage Management (ASM) Health Checker periodically polls the storage environment's overall health. Below are the most common scenarios that trigger this alert:

The disk group has dropped offline. This indicates a loss of disk quorum. 3. Check for Ongoing Rebalance Operations

Intermittent loss of connectivity to the SAN/LUNs causes heartbeat timeout warnings (e.g., Waited 15 secs for write IO ).

Re-scans, OS reboots, or sector size changes ( ORA-15085 ) on the SAN break the shared storage layer. 📋 Comprehensive Troubleshooting Guide