vCF validation fails – Found zero SSD devices

vCF validation fails – Found zero SSD devices

Following my first tests in a nested environment, I wanted to deploy VMware Cloud Foundation 3.7 on physical machines this time.
I received a couple of prepared ESXi hosts on which I planned to deploy vCF.

During the configuration file validation however I received following message:

“Host <HOST-IP> found zero SSD devices for SSD cache tier.”

When checking the host configuration using the command “vdq -q” I saw following:

  {
      "Name"     : "naa.XXXXXXXXXXXXXX",
      "VSANUUID" : "523c99c8-3f9f-7300-9393-04b54ade78c1",
      "State"    : "In-use for VSAN",
      "Reason"   : "None",
      "IsSSD"    : "1",
"IsCapacityFlash": "0",
      "IsPDL"    : "0",
      "Size(MB)" : "1526185",
   "FormatType" : "512e",
   },

Note the “State” entry, which says that the device is already in use for a vSAN configuration. Although the solution was rather simple, I failed to see it initially. Thanks to VMware guys to point me to it.

It appears that the hosts were configured with vSAN before the reinstallation, and still contained the partitions from the previous installation.
To remove them, I proceeded as follows:

  • List vSAN disk group UUIDs:
esxcli vsan storage list | grep "VSAN Disk Group UUID"

 

  • Remove all vSAN disk group UUIDs:
esxcli vsan storage remove -u 521db89e-8405-5fc4-633e-418888d2f7ca && 
esxcli vsan storage remove -u 52284813-cdd9-19a1-e555-38d0def7d822 && 
esxcli vsan storage remove -u 52520d9b-d7f5-0db9-3332-8454bb8fe419
  • Check if disks are eligible now:
vdq -q

...
 {
      "Name"     : "naa.XXXXXXXXXXXXXX",
      "VSANUUID" : "",
      "State"    : "Eligible for use by VSAN",
      "Reason"   : "None",
      "IsSSD"    : "1",
"IsCapacityFlash": "0",
      "IsPDL"    : "0",
      "Size(MB)" : "1526185",
   "FormatType" : "512e",
   },
...

Now the “State” entry shows that the disk is eligible for vSAN.
This solved my issue.

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