Subj : Re: How to detect RAM disks (Was: how to detect cdrom?)
To   : Charles Dye
From : Jasen Betts
Date : Sun Feb 17 2002 08:21 am

From: Jasen.Betts@p42.f531.n640.z3.cereal.mv.com (Jasen Betts)
Subject: Re: How to detect RAM disks (Was: how to detect cdrom?)

Hi Charles.

14-Feb-02 23:57:14, Charles Dye wrote to Matthias Paul


 CD> From: raster@highfiber.com (Charles Dye)

 CD> "Matthias Paul" <Matthias.Paul@post.rwth-aachen.de> wrote:

 CD> >RAMDRIVE.SYS in fact uses F8h as a media byte, but DR DOS'
 CD> >VDISK.SYS uses FEh to emulate a single sided 8 sectors/track
 CD> >disk, with 128 byte sector size (160 Kb). TDSK and BITDISK >used
 CD> to use FAh like Tandy DOS, but I have changed this to >F8h
 CD> meanwhile.

 CD> Well, shoot.  I would definitely want to detect the DR DOS
 CD> RAMdisk. And I'd prefer to test some common quality, instead of
 CD> keeping a long list of strings to match.  Do you know whether all
 CD> of the above use only a single FAT

some common qualities: when you boot the drive will be empty. (except for a
volume label)

it'll have a higher drive letter than any physical disk
it'll also be non-removable, writable (and have free space) unlike a cd-rom.

 -=> Bye <=-
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