From: "Thorsten Erdmann" <thorsten DOT erdmann AT gmx DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: How to flush CDROMs and MSCDEX buffers
Date: Thu, 20 Jul 2000 20:28:47 +0200
Organization: AddCom AG
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hi,

I have some problems with my Joliet driver. For reading from CD I use
MSCDEX. It's Readblock and DiskInfo functions return the same sectors even
if I change the CD. So I read the directory of the first CD, all works fine.
When I insert another CD and read the directory again I get that one from
the old CD. So someone seems to buffer some CD sectors, maybe the CD drive
itself or  MSCDEX.

How can I flush that buffer to read the actual info?

I traced it down to MSCDEX's ReadBlock routine. It really reads old data
sectors. It's not a problem in my own buffer mimic.

Thank you
Thorsten