Asm Health — Checker Found 1 New Failures Updated

If a specific disk is permanently offline:

Online the disk manually to clear the health checker failure: SQL> ALTER DISKGROUP ONLINE ALL; Use code with caution. Monitor the rebalance operation:

The resolution depends entirely on the root cause. Below are the most common fixes.

If a disk is OFFLINE or MISSING , verify if the OS can still see the device path. Use multipath -ll or lsblk on Linux to check device paths. If the device is gone, it is a storage hardware issue. 5. Repair or Drop the Affected Disk asm health checker found 1 new failures updated

The "1 new failure" usually falls into one of four categories: Failure Category Common Root Cause Typical Error Code Lost paths to storage (Mpath/SAN failure) ORA-15032 , ORA-15080 Metadata Corruption Power outage, abrupt shutdowns, bugs ORA-15130 , ORA-15042 Space Exhaustion Archive logs or backups filling up disk groups ORA-15041 Permission/Ownership Misconfigured /dev/oracleasm or Udev rules ORA-15025 Step 3: Run Manual Verification Commands

The "ASM health checker found 1 new failures updated" message indicates a potential issue with the ASM instance or one of its associated disks. By understanding the causes of ASM health checker failures and following a step-by-step troubleshooting guide, you can identify and resolve issues before they become critical problems. Regular monitoring and maintenance of ASM instances and disks can help prevent health checker failures and ensure optimal performance and stability of your Oracle database and storage environment.

If necessary, use the Oracle-provided asmcheck utility (requires caution). 4. Best Practices for Prevention If a specific disk is permanently offline: Online

The ASM health checker is a continuous monitoring process that checks the health and performance of ASM instances. It collects data on various aspects of ASM operations, including:

You may need to drop the failed disk and add a replacement, then monitor the ARB0 background process to ensure a successful rebalance. KB88485 - My Oracle Support

Several factors can lead to this alert, including: If a disk is OFFLINE or MISSING ,

This command checks the internal consistency of the disk group metadata without making any repairs. It can be run while the disk group is mounted, making it safe for most production environments.

Disclaimer: Always follow your organization's maintenance protocols and verify before running high-impact commands like ALTER DISKGROUP . Need specific troubleshooting help? To give you more tailored advice, could you tell me:

: Schedule weekly orachk cron jobs to catch silent degradation before it triggers critical system alerts.