Asm Health Checker Found 1 New Failures Updated May 2026
The message "ASM Health Checker found 1 new failures updated" is a crucial early warning system. It signifies that your storage layer has lost resilience, even if the database is currently online. Because ASM relies on redundancy to protect data, a "new failure" effectively puts the system in a degraded state.
Immediate investigation is required to determine if the failure is physical (requiring hardware replacement) or logical (requiring resync). Ignoring this alert significantly increases the risk of a total storage outage.
Connect to your ASM instance using sqlplus / as sysasm and run the following diagnostic queries:
A. Check disk group overall health:
SELECT name, state, type, total_mb, free_mb, offline_disks
FROM v$asm_diskgroup;
If offline_disks > 0, you have confirmed physical disk failures.
B. Identify failing disks:
SELECT group_number, disk_number, name, path, state, mode_status, failgroup
FROM v$asm_disk
WHERE state != 'NORMAL';
Disks in FORCING state (attempting recovery) or OFFLINE state are the culprits.
C. Check for I/O errors (recent history):
SELECT * FROM v$asm_disk_iostat
WHERE read_errs > 0 OR write_errs > 0 OR bytes_read = 0;
D. Examine ASM operations:
SELECT * FROM v$asm_operation;
Look for active rebalancing or recovery operations that may have been triggered by the failure.
Once you have resolved the immediate issue and the message "ASM Health Checker found 1 new failures updated" no longer appears, implement these preventive measures.
$ asmcmd health check
...
FAILURE: Disk group DATA – Disk DATA_0002 is offline
...
Prepared by: [Your Name/Role] Status: Awaiting resolution
This alert indicates that the Oracle Automatic Storage Management (ASM)
health checker has detected a potential issue, such as disk corruption or a hardware-related failure group problem . In Oracle environments, this message often appears in the
when ASM's internal monitoring identifies a change in the status or integrity of a disk group. Incident Summary ASM Health Checker 1 New Failure Found
Possible diskgroup dismount or reduced redundancy if not addressed. Detailed Investigation Report Findings & Actions Primary Cause Often related to block corruption on an ASM disk or a failure group losing connectivity (e.g., hardware/HBA failure). Immediate Diagnostic Run the command ALTER DISKGROUP
if using Normal/High Redundancy, though data is still at risk if a second disk fails. Recommended Repair ALTER DISKGROUP
A specific block (often metadata blocks 0-250) becomes unreadable, triggering a health check failure. Hardware Timeout:
Mirrored disks going offline due to controller issues, which can force a disk group to dismount to prevent data loss. Unbalanced I/O:
Significant performance degradation or I/O bottlenecks may also trigger warnings that require a manual Next Steps for Remediation Identify affected Diskgroup: V$ASM_DISKGROUP view for any group not in a Review ASM Logs: ADRCI tool show alert -p "message_text like '%error%'" to find the exact timestamp and error code. Validate Hardware:
Ensure no physical disks are in a "Predictive Failure" or "Unconfigured-Bad" state via your storage management console. Perform Repair: If corruption is confirmed, use the CHECK ALL REPAIR command mentioned above. specific SQL queries
to check the status of your failure groups or disk redundancy?
ASM Health Checker Alert: Understanding and Addressing "1 New Failure Updated"
Introduction
The ASM (Automatic Storage Management) health checker is a crucial tool in Oracle databases that monitors and reports on the health of storage configurations. When the ASM health checker identifies issues, it alerts database administrators to take corrective action. One such alert is "asm health checker found 1 new failures updated," which indicates that a problem has been detected and updated in the ASM configuration. In this article, we will delve into what this alert means, its implications, and a step-by-step guide on how to address it. The message "ASM Health Checker found 1 new
Understanding the Alert
The ASM health checker periodically runs and checks for various conditions that could affect the performance, availability, or integrity of the storage. When it finds a new failure or an update to an existing failure, it logs an alert. The alert "asm health checker found 1 new failures updated" typically indicates:
Common Causes
Several factors can lead to this alert, including:
Implications
Ignoring this alert can lead to more severe consequences, including:
How to Address the Alert
| Scenario | Recommended Action |
|----------|--------------------|
| Planned disk maintenance | Ignore if expected; check after maintenance. |
| Single disk failure | Replace or re-add disk: alter diskgroup DATA online disk 'DATA_0001'; |
| Multiple disks in same failure group | Investigate storage/LUN path issues urgently. |
| After power/storage event | Run asmcmd health check again; verify redundancy. | If offline_disks > 0, you have confirmed physical
SELECT group_number, name, path, state, failgroup, mode_status
FROM v$asm_disk
WHERE state != 'NORMAL';
When you see "ASM Health Checker found 1 new failures updated" in the ASM alert log, follow this systematic diagnostic procedure.