To remove and recreate a disk group using esxcli commands:

  1. Log in to the ESXi host that owns the disk group as the root user using SSH.
  2. Run one of these commands to put the host in Maintenance mode.

    Note: VMware recommends using the ensureObjectAccessibility option. Failure to use this ensureObjectAccessibility mode or evacuateAllData mode may result in data loss.
    • Recommended:
      • Ensure accessibility of data:
        esxcli system maintenanceMode set –enable true -m ensureObjectAccessibility
      • Evacuate data:
        esxcli system maintenanceMode set –enable true -m evacuateAllData
  3. Record the cache and capacity disk IDs in the existing group by running this command:
    esxcli vsan storage list

    Example output of a capacity tier device:
    Device: naa.123456XXXXXXXXXXX
    Display Name: naa.123456XXXXXXXXXXX
    Is SSD: true
    VSAN UUID: 52164f1b-668b-ec68-b293-919b04e78fa3
    VSAN Disk Group UUID: 52ab175f-17c6-6f42-e10a-ca86fc1d008e

    VSAN Disk Group Name: naa.50000XXXXX1245
    Used by this host: true
    In CMMDS: true
    On-disk format version: 5
    Deduplication: true
    Compression: true
    Checksum: 5356031598619392290
    Checksum OK: true
    Is Capacity Tier: true
    Encryption: false
    DiskKeyLoaded: false

    Note: For a cache disk:
    • the VSAN UUID and VSAN Disk Group UUID fields will match
    • Output will report: Is Capacity Tier: false
  4. Then remove the disk group

    esxcli vsan storage remove -u <VSAN Disk Group UUID>

    Note: Always double check the disk group UUID with the command:
    esxcli vsan storage list
  5. Create the disk group, using this command:
    esxcli vsan storage add -s naa.xxxxxx -d naa.xxxxxxx -d naa.xxxxxxxxxx -d naa.xxxxxxxxxxxx

    Where naa.xxxxxx is the NAA ID of the disk device and the disk devices are identified as per these options:
    • -s indicates an SSD.
    • -d indicates a capacity disk.
  6. Run the esxcli vsan storage list command to see the new disk group and verify that all disks are reporting True in the “in CMMDS:” field output.

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