• This topic has 2 replies, 2 voices, and was last updated November 21, 2023 by Alex C.

Zerto VRAH behavior during live failover

  • I recently conducted a Live Failover for a customer with reverse replication enabled. This customer did not want to use production VMs, so we temporarily added VMs to Zerto in order to go through live failover process. These VMs were failed over with reverse protection enabled.

    A week later we failed the VMs back to the protected site. Reverse protection was NOT enabled, since these VMs no longer needed to be protected by Zerto. Days after the test, VRAH vms were still on the protected site.

    My questions are:

    1. Do VRAH vms ever get created on a protected site?
    2. If not, shouldn’t those VRAH vms get cleaned up after the live failover operation back to the protected site?
    3. Did reverse replication not being enabled have anything to do with this?

    Hi Alex,


    1. A VRA-H is created whenever a VRA detects that it needs one to overcome the VMware limitation of 60 disks per VM. They are just disk-boxes that hardly use any resources (CPU/MEM).
    2. If a VRA-H is not needed anymore, it will be deleted.
    3. VRA-H creation and deletion is at the discretion of the VRA. Its presence orĀ  absence is fully transparent to any operations that are performed on VMs that are being protected by that VRA.

    Basically, just ignore any VRA-Hs you see as they don’t use resources and are transparent.

    Is it normal to see VRA-H’s on the protected site?

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