VSAN stripe width not used with VM Home, but is used on Hard Disks

[terrible_towel]

This may just be the way its supposed to be, I'm not sure.  I asked VMware support and they were very non committal on an answer.

I have a VM Storage Policy that says: 1 host failure to tolerate, stripe objects across 2 disks.

vSphere 6U1.  Freshly built and then VMs migrated into it.

When I look a VM, I see:

VM Home

-Witness

- Raid 1

   -component

   -component

Hard Disk

  -Witness

  -Raid 1

    -Raid 0

      -component

      -component

    -Raid 0

      -component

      -component

Are the VM Home's supposed to follow a defined Storage Policy?

Or does it just use the built in Virtual SAN Default Storage Policy ?

Note - after the VMs were put into this VSAN cluster (using my local Storage Policy), I did go back in and change the Virtual SAN Default Storage Policy to have a stripe width of 2 instead of 1.

I don't understand why the VM Home is not striped like the Hard Disk is.

Thanks!

Paul

[CHogan · Accepted solution]

This is expected behaviour for the VM Home Namespace Paul.

I wrote about it here - http://cormachogan.com/2014/03/12/vsan-part-18-vm-home-namespace-and-vm-storage-policies/

[terrible_towel]

Great information.  Thank you very much.  I'm reading the rest of your blogs now  8-)

Paul