Hello all,

This post is related to the previous one vSAN commands – VMware vSAN – Part 1

Today, new ESXi vSAN commands will be explained for better vSAN understanding and it’s ESXi related which can be used for troubleshooting, but not in all cases.

esxcli vsan storage list   List storage disks claimed by vSAN.

The output shows different vSAN information, but for me, the most important is CMMDS. So, what does CMMDS mean?
Basically is simple, if the CMMDS value is “true”, it means disk is being used and it’s part of the vSAN. but what about false? False means disks is not in use and two reasons behind that:

  • The disk was part of the vSAN and due to an error it’s not longer vSAN available. if all disks are false, I would bet you have vSAN issue.
  • The disk is not part of the vSAN and it can be claimed.

In my lab, this command is used when an ESXi host reports disk issues, it’s a known error casued by firmware vs driver (bacsue my lab is not 6.5 VMware supported)  and the workaround is to reboot the host. 🙁


  1. Dhileepan


    Hi how to get the Disk Group Name ? I am not speaking about uuid. I am speaking about Disk Group Name
    Ex: Disk group(020000000055cd2e404codxxxxxxxxxx)

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