Nonuse of Irp->MdlAddress in checked build

NTFSD
1

The checked build of Win2K will exclusively request data from my FSD using
direct I/O in directory control operations.

In the free build, however, the same operation will request data using
another data transfer method (neither i/o).

The question is whether I can force the checked build of Win2K to request
data NOT using direct i/o in the checked build, ie. operate similarly to
the free build. It would be nice to fully debug the FSD in the debug /
checked build environment.

TIA UKO.

2

BTW forgot to mention that, yes, the device object buffer method as been
specified as DO_DIRECT_IO.

TIA UKO.