Before changing configurations, locate the exact payload of the health check alert. Open the console.
Finding Name : Datafile is old Type : FAILURE Priority : HIGH Message : Datafile 2: 'H:\PATH\UNDO.DATA1' needs media recovery
Next, check the status of your ASM disk groups and individual disks.
The system is designed to run these checks periodically. When it finds a new issue, it logs the message "ASM Health Checker found 1 new failures" in the ASM alert log, located at <GRID_HOME>/diag/asm/+asm/+<ASM>/alert/log.xml . This alert is often also picked up and reported by Oracle Enterprise Manager (OEM) as a 'Checker Failure Detected' event. asm health checker found 1 new failures
ALTER DISKGROUP DATA DROP DISK 'DATA_0001'; ALTER DISKGROUP DATA ADD DISK '/dev/mapper/asm_data_new' NAME 'DATA_0001';
dd if=/dev/mapper/asm_data2 of=/dev/null bs=8192 count=1
Run lsdg to confirm that all disk groups are properly mounted, displaying the correct usable capacity and balanced allocation units. Before changing configurations, locate the exact payload of
The message is a critical alert in the Oracle Automatic Storage Management (ASM) alert log indicating that the internal Health Monitor has detected a significant operational issue . This failure often precedes or accompanies a diskgroup being forced to dismount or an instance entering a "dirty detach" state. Common Root Causes
To help me give you more specific troubleshooting steps, could you tell me: What is the or code?
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: One or more LUNs/disks became inaccessible due to hardware, cable, or storage controller issues. Write I/O Errors
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When it prints found 1 new failures , it means a single, distinct event has degraded the cluster's idealized state. Common Root Causes Behind the Failure Alert The system is designed to run these checks periodically
This message usually appears alongside other ORA- errors and signals that ASM has identified a problem with the storage layer. Common triggers include: Disk Failures
WARNING: Write Failed. group:1 disk:1 AU:1 offset:4190208 size:4096 path:ORCL:CELLI01 asynchronous result:'I/O error' osderr1:0x3 osderr2:0x2e ASM Health Checker found 1 new failures NOTE: initiating dirty detach from lock domain 1 Use code with caution.