Asm Health: Checker Found 1 New Failures Updated Free

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

If a disk is offline, check the operating system messages (e.g., /var/log/messages on Linux or dmesg ). Look for SCSI errors or timeout messages. If the OS cannot see the LUN, the issue is at the hardware or SAN level, not the Oracle level.

When a DBA sees "ASM Health Checker found 1 new failures updated," the response must be methodical. Panic is the enemy; the alert is a tool, not an accusation. The administrator must query the V$ASM_HEALTH view or check the alert logs to pinpoint the specific component that triggered the failure. Was it a rebalance operation that failed? Is a disk currently offline? Is there a quorum failure in a clustered environment? The alert is the starting gun for a forensic investigation. asm health checker found 1 new failures updated

The one-line alert is just a header. Immediately examine the ASM alert log for surrounding messages.

If a disk group was previously dismounted or had an unclean dismount (e.g., due to a system crash or hardware failure), it can lead to inconsistencies that trigger health check failures. Metadata might not be fully synchronized across all disks, leading to checksum validation failures when the health checker runs. If a disk is OFFLINE or MISSING ,

To prevent ASM health checker issues, follow these best practices:

Look for a run that completed with STATUS = 'COMPLETED' but that produced findings. The check_name column may indicate DB Structure Integrity Check or ASM Structure Integrity Check . If the OS cannot see the LUN, the

If a disk group drops below its minimum redundancy requirement (e.g., losing a partner disk in normal redundancy), ASM will immediately dismount it to protect against split-brain scenarios or data corruption.

Look for "Write Failed" or "I/O error" warnings to see if a physical disk has dropped.

The ASM Health Checker functions under Oracle's structural fault diagnosability framework. Whenever an Oracle database or ASM instance encounters a critical internal error or an I/O timeout, the framework generates an .

When you receive a notification that the "ASM health checker found 1 new failures updated," it means that the ASM health checker has detected a new issue with the ASM instance or one of its associated disks. The failure message is updated in the ASM alert log, indicating that a new problem has been identified.