OSDATA volume has been detected corrupted

Products

• VMware vSphere ESXi 7.0
• VMware vSphere ESXi 8.0

Issue/Introduction

Symptoms:

ESXi 7.x or later detects metadata corruption in its OSDATA VMFS-L volume.

To investigate the corruption, VOMA check may be run against an OSDATA VMFS-L partition, or a VOMA dump may be collected from it. 

• To identify the OSDATA device and partition number, run below command:
  esxcfg-scsidevs -m | grep OSDATA
• Run VOMA check/dump, using below:
  voma -m vmfs -f check -d /vmfs/devices/disks/naa.################:#
  voma -m vmfs -f dump -d /vmfs/devices/disks/naa.################:#

Validation:

From ESXi - /var/log/vmkernel.log:

VMFS volume OSDATA-########-#######-#####--########/<volume UUID> on <device>:<partition number> has been detected corrupted.

Environment

VMware ESXi 7.x
VMware ESXi 8.x

Resolution

Re-install ESXi.

 

It will cause the OSDATA partition to be re-created. It is not possible to recreate the partition without ESXi re-install.   

 

Note: Running VOMA fix or advfix against OSDATA VMFS-L partition is not supported. 
VOMA fix/advfix will fail with error(ERROR: Device Failed to close. Read-only file system)

Additional Information

For further information on the use of VOMA, see Using vSphere On-disk Metadata Analyzer (VOMA) to check VMFS metadata consistency