> as a matter of fact, all SCSI/RAID/USB/whatever disk devices are
> either Int13-visible (using the boot eprom for SCSI/RAID or by
> emulation ), or not visible at all.

Ever heard of DOS block devices? Think of a RAM disk. It'll usually  
install a DOS block device so that DOS can access it's FAT filesystem  
using the normal device access. Int25/26 and DOS file access work on the  
RAM disk while Int13 (obviously) doesn't.

What I'm talking about is that you can't go and use a local filesystem  
redirector (f.e. iHPFS) and mentioned RAM disk to create/format the RAM  
disk with a non-FAT filesystem which would be known to the redirector  
(f.e. HPFS).


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