mkdir z:\mytempdir failing at startup on d90 and working on c90

mkdir z:\mytempdir failing at startup on d90 and working on c90

Greetings all.

If starting a .bat in startup group of local thin client with just a mere mkdir 'z:\mytempdir' command
works on c90 (xp) and fails on d90 (win7 embedded)

Is there a way to have it work without using administrator login?

Sounds like a software issue of the ram drive to me, but anyone one knows if this overprotection of ramdrive z: is intentional and if any workaround exists?

Thanks