Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!nic.MR.NET!xanth!mcnc!ecsvax!harris
From: harris@ecsvax.uncecs.edu (Mark Harris)
Newsgroups: comp.sys.ibm.pc
Subject: problem with disk copy
Keywords: int 13, disk copy
Message-ID: <6349@ecsvax.uncecs.edu>
Date: 5 Feb 89 00:43:19 GMT
Organization: UNC Educational Computing Service
Lines: 17


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? 

-- 
     Mark Harris                            mail:harris@ecsvax(UUCP/BITNET)
     Department of Mathematical Sciences
     Appalachian State University
     Boone, NC 28608      (704) 262-3050 office, 264-6906 home