Mounting a file system on a directory

NTFSD
1

Greetings,
I’m looking for some help with mounting a file system on a directory
via SetVolumeMountPoint.

I have a file system that I’m porting to Windows. In general, it mounts
OK, but I have one strange error condition that manifests itself as
follows:

  1. format a partition with my file system
  2. use SetVolumeMountPoint to mount the file system on an NTFS directory
    << at this point the file system is NOT accessible via the NTFS path >>
  3. reboot the system
    << the file system IS accessible via the NTFS path >>

As a variation, if instead of rebooting the system in step 3, I use
the Disk Management tool to assign a drive letter to the partition
(that was formatted in step 1), that somehow makes the file system
accessible via the NTFS path…

It feels like my file system is not handling some event properly,
but I can’t figure out what it is…

Anybody have an idea on where to look?

Thanks in advance,
-bob