this may add to the picture as my VDAT recently really misbehaved... which it hadn't done before, a since I hadn't had much time to use it anyway, it didn't really matter)
my Scope system boots from a (quality) flashdisk, that's plugged directly into the IDE connector - that thingy was a hell of expensive, but performs excellent.
2 nd drive was a regular harddisk, but I replaced it with a compact/flash to IDE adapter. Basically no problem, but it performed noticably slower than the first drive.
Impossible to record with VDAT to the compactflash card, lost synch, wierd reactions etc. Strangely it refused to work with the main drive, too (which it had once done).
A look into device manager revealed that the compact flash adapter was listed as an int-13 device, so it ran in PIO mode - which is supposed to drag the other channel's performance down... (I I remember correctly)
Removed the adapter - VDAT seems to perform radically better.
My conclusion is that whenever VDAT doesn't get it's access to disk
immediately (by whatever reason), it starts bitching around.
I don't think it will make friendship with a disk-streaming sampler accessing the same drive, for example...
cheers, Tom