VHD query attachVirtualDisk

Question

Hi,
if we use the ATTACH_VIRTUAL_DISK_FLAG_NO_LOCAL_HOST flag, where do the VM disks get attached.

Suppose i have created a snapshot and use the base disk for the openVirtualDisk() function. Now if i call in the AttachVirualDisk(...) with the flags with ATTACH_VIRTUAL_DISK_FLAG_NO_LOCAL_HOST, where do the VM disks get attached ?

Is it to the hypervisor host or VM host ?
Using the AttachVirtualdisk() has any performance impact on either of the hosts ?
is there any command (diskManager) where we can look at the attached disks ?

====
attachFlags = ATTACH_VIRTUAL_DISK_FLAG_NO_LOCAL_HOST |
ATTACH_VIRTUAL_DISK_FLAG_READ_ONLY;

opStatus = AttachVirtualDisk(
    sourceVhdHandle,
    NULL,
    attachFlags,
    0,
    &attachParameters,

NULL);

appreciate your response.

-Balu

Answer 1

Hi,

--if we use the ATTACH_VIRTUAL_DISK_FLAG_NO_LOCAL_HOST flag, where do the VM disks get attached.

ATTACH_VIRTUAL_DISK_FLAG_NO_LOCAL_HOST: Specifies that the operating system disk device created when the virtual disk is attached will not be exposed to the local system, but rather to a virtual machine running on the local system.

https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-vds/32a46f9f-66be-44e8-951f-563368084546

-------------------

If the reply could be of help, please help to accept it as an answer, thanks for your cooperation!
Thanks for your time!
Best Regards,
Anne