[comp.sys.ibm.pc.misc] Switching A/B Drives with MS-DOS 4.01

jw2b@watt.acc.Virginia.EDU (Sara J. Wagner) (02/01/91)

I just got a 386 machine (which solves some of the memory problems I've
posted about in the past).  The A: drive is a 5.25" high density (1.2
meg) floppy, and the B: drive is a 3.25" high density (1.44 meg)
floppy.  For various reasons, I'd like to make the 3.25" drive my A:
drive.  This is principally because my backup software will recognize a
3.25" drive as A:, but not as B:, and I'd like to run my backups to the
better-protected (hard case) floppies.  Questions:

Is there a way in DOS to switch the drives?  I can't find anything in
the manual.  Are there dangers in doing this/reasons to not do this?

Whether or not I switch the drives, I need to be able to back up
floppies from one drive to the other.  On my 286 (with the same types of
drives), I did this with diskcopy.  However, that doesn't work between
different kinds of drives.  Is there any way to make this work
(quickly)?  I have tried xcopy and also just plain copy *.* -- both are
very slow, and both do not make a mirror image.  If there was a file on
the backup floppy that was not on the working disk (i.e., it had been
deleted), it would remain on the backup.  Any suggestions?

Thanks.  Please e-mail; I'll post if there is interest.

Jane Wagner, Information Specialist	   BITNET:  jw2b@virginia.bitnet
The Claude Moore Health Sciences Library   INTERNET:  jw2b@virginia.edu
Box 234, UVA Health Sciences Center	   PHONE:  804-924-0188
Charlottesville, VA  22908 		   Opinions expressed are my own