vSAN Skyline Health reports error - "Physical disk health retrieval issue".

Products

• VMware vSAN

Issue/Introduction

Symptoms:

• vSAN Skyline Health reports the error: "Physical disk health retrieval issue". One or more disks show as unhealthy.
• One or multiple disks shows unhealthy.

Environment

VMware vSAN 6.x
VMware vSAN 7.x
VMware vSAN 8.x

Cause

This issue might occur if there is an unknown or stale disk present on the host that is not recognized by CMMDS (Cluster Monitoring, Membership, and Directory Services). This discrepancy can trigger the "physical disk health retrieval" alarm, causing the disks to show as unhealthy.

Resolution

1. Check for unhealthy disks in vCenter:
   Navigate to Cluster > Configure > Disk Management.
2. Run the following command to identify any missing disks 
   "vdq -iH"
DiskMapping[0]:
           SSD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
 
   DiskMapping[2]:
           SSD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
 
   DiskMapping[4]:
           SSD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
            MD:  naa.xxxxxxxxxxxxxxxx
3. Run the following command to detect unknown or stale disks
   "esxcli vsan storage list"
Unknown:
   Device: Unknown
   Display Name: Unknown
   Is SSD: false
   VSAN UUID: yyyyyyyy-yyyy-yyyy-yyyy-yyyyyyyyyyyy
   VSAN Disk Group UUID:
   VSAN Disk Group Name:
   Used by this host: false
   In CMMDS: false
   On-disk format version: -1
   Deduplication: false
   Compression: false
   Checksum:
   Checksum OK: false
   Is Capacity Tier: false
   Encryption Metadata Checksum OK: true
   Encryption: false
   DiskKeyLoaded: false
   Is Mounted: false
   Creation Time: Unknown
4. Take necessary actions if a missing disk is identified. Please refer this KB to troubleshoot vSAN OSA disk issues: How to troubleshoot vSAN OSA disk issues
5. Place the host in maintenance mode and reboot the host, if the stale or unknown disk persists.