In a message to Linda Proulx, Peter Knapper wrote re: Warp 3 install

LP> And the [DOS HPFS] driver is & I can get it where?

PK> To allow DOS to read HPFS, the driver requires a total of about 250Kb of
PK> memory. To WRITE to an HPFS partition requires a lot more, something like
PK> 420KB, so in most cases, reading and writing to HPFS from DOS is just not
PK> really practical for productive work. 

And the reason this is a problem under DOS but not under OS/2 is 
because DOS makes that crazy real-mode distinction between 
"conventional" and other (ie "high" XMS EMS &etc) memory while 
OS/2 can address all your system's memory in a single address 
space.  To dedicate 250k or more of your 640k of DOS
"conventional" memory to access HPFS partitions under DOS puts a
serious crimp on what else you can run while that HPFS driver is
loaded.  Since OS/2 doesn't have that silly 640k ceiling for
memory, the 250-some kilobytes of overhead required by HPFS
simply isn't as much of an issue when running HPFS under OS/2.



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