Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!sun!pitstop!sundc!seismo!uunet!mcvax!unido!fauern!faui44!immd3.informatik.uni-erlangen.de!rtregn
From: rtregn@immd3.informatik.uni-erlangen.de (Robert Regn)
Newsgroups: comp.sys.ibm.pc
Subject: Re: problem with disk copy
Message-ID: <840@faui10.informatik.uni-erlangen.de>
Date: 14 Feb 89 11:15:11 GMT
References: <6349@ecsvax.uncecs.edu>
Organization: IMMD I, University of Erlangen, W-Erlangen
Lines: 19

From article <6349@ecsvax.uncecs.edu>, by harris@ecsvax.uncecs.edu (Mark Harris):
 
- I've run into a slight problem with a disk copying program I wrote to 
- speed up the process of making multiple copies of a single disk.  I use
- BIOS interrupt 13h to copy all the sectors of a disk to a 360k file on 
- my hard disk, then I reverse the process, repeatedly copying the file
- to formatted blank disks.  I noticed that if I did a 'dir' on a blank disk,
- then ran my copy program another 'dir' still showed the disk blank.  If I
- simply open then close the drive door and do a dir I see the correct files.
- I assume that the old FAT and directory are still buffered when int 13 bypasses
- DOS.  Any recommendations on what I should do at the end of a disk copy to
- 'log in' the altered disk? 
 
Why you don't use int 25h ? It works a level higher and you nedd not worry
about sectors and heads.

Robert Regn
rtregn@faui32.uucp
rtregn@immd3.informatik.uni-erlangen.de