vSAN Health Service - Physical Disk Health - Operation Health
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vSAN Health Service - Physical Disk Health - Operation Health

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Article ID: 326969

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Updated On:

Products

VMware vSAN

Issue/Introduction

This article explains the Physical disk Health - Overall Disks Health check in the vSAN Health Service and provides details on why it might report an error.

Environment

VMware vSAN 6.5.x
VMware vSAN 6.0.x
VMware vSAN 8.0.x
VMware vSAN 7.0.x

Resolution

Q: What does the Physical Disk Health - Overall Disks Health check do?

Checks the physical disk operation status for all hosts in the vSAN cluster.

Q: What does it mean when it is in an error state?

If this check fails, the disk cannot be used by vSAN or vSAN Direct anymore with the possible reasons including the physical disk damage, the issue in reading the disk metadata, the vSAN software issue preventing it to use this disk or the disk is in read-only mode.

Q: What does it mean when the operational state is Impending permanent disk failure?

Dying Disk Handling (DDH) in vSAN continuously monitors the health of disks and disk groups in order to detect an impending disk failure or a poorly performing disk group. When such conditions are detected, vSAN marks the disk or disk group as unhealthy and might trigger data evacuation from the affected disk or disk group. Such disks and disk groups display an operational state of Impending permanent disk failure. For more information, see Dying Disk Handling (DDH) in vSAN 6.6 (2148358).

Note: This state is not available for vSAN Direct.

Q: How does one troubleshoot and fix the error state?

You need to examine the information displayed as part of the health check.

For example:
  • Is the disk offline or permanent failure indicating there is physical disk damage?
  • Is it an issue when trying to read the metadata of the drive? This implies that the drive is offline and unavailable for use.
  • Is it the vSAN software state that is the root cause, which in all likelihood will impact all of the disks on this host?
  • Is the disk set to read-only mode? In this case please contact VMware support to help unset the disk read-only mode.
Each of these individual checks must be considered to determine the corrective course of action. Some of the checks imply that the drive is offline, others imply that the drive is still online, but some corrective action might be needed.

Note: From VMware vSAN 6.5 Update 2, Physical disk overview is rebranded as Operation Health.

Additional Information

For more information on collecting VMware vSAN logs, see Collecting vSAN support logs and uploading to VMware (2072796).

For more information about how vSAN handles dying disks, see Dying Disk Handling (DDH) in vSAN 6.6 (2148358).

For more information about disk failures in a vSAN cluster with deduplication, see Identifying specific disk failure in a vSAN deduplication cluster (2149067).

Also, see:
vSAN Health Service - Cluster Health - vSAN Health Service up-do-date
vSAN Health Service - Cluster Health - Advanced vSAN configuration in sync
vSAN Health Service - Network Health - Hosts disconnected from vCenter Server
vSAN Health Service - Network Health - Unexpected vSAN cluster members
vSAN Health Service - Network Health - vSAN Cluster Partition
vSAN Health Service - Network Health – Hosts with vSAN disabled
vSAN Health Service - Network Health - All hosts have a vSAN vmknic configured
vSAN Health Service - Network Health - All hosts have matching subnets
vSAN Health Service - Network Health - Hosts small ping test (connectivity check) and Hosts large ping test (MTU check)
vSAN Health Service - Network Health - Hosts with connectivity issues
vSAN Health Service - Data Health – vSAN Object Health
vSAN Health Service - Physical Disk Health - Metadata Health
vSAN Health Service - Limits Health – Current Cluster Situation
vSAN Health Service - Limits Health – After one additional host failure
vSAN Health Service - Physical Disk Health - Disk Capacity
vSAN Health Service – Physical Disk Health – Component Metadata Health
vSAN Health Service - Physical Disk Health – Congestion
vSAN Health Service - Physical Disk Health – Memory pools
vSAN Health Service - vSAN HCL Health - Controller Release Support
vSAN Health Service – vSAN HCL Health – Controller Driver
vSAN Health Service - vSAN HCL Health – vSAN HCL DB up-to-date
vSAN Health Service - vSAN HCL Health – SCSI Controller on vSAN HCL
vSAN Health Service - Cluster Health – CLOMD liveness check
vSAN Health Check Information
vSAN 健全性サービス - 物理ディスクの健全性 - ディスクの全体的な健全性