From: Jamey Kirby [jkirby@storagecraft.com]
Sent: Friday, June 18, 1999 11:15 AM
To: Peter van Sebille; Robert Fernando
Cc: ntdev; ntfsd
Subject: [ntdev] RE: [ntfsd] clearing the cdrom cache from inside a
filter driver

DO_VERIFY_VOLUME and return STATUS_VERIFY_REQUIRED.

You must also support the media change count via IOCTL_CDROM_CHECK_VERIFY
and IOCTL_CDROM_MEDIA_REMOVAL functions.

Jamey Kirby
StorageCraft


-----Original Message-----
From: owner-ntfsd@atria.com [mailto:owner-ntfsd@atria.com]On Behalf Of
Peter van Sebille
Sent: Friday, June 18, 1999 12:48 AM
To: Robert Fernando
Cc: ntdev; ntfsd
Subject: Re: [ntfsd] clearing the cdrom cache from inside a filter
driver


Robert,

Since I've seen your questions popping up once in a while
without anyone answering I'll give it a try.

>From the filter driver pretend that the media has changed.
Then, play along with the I/O Manager's attempt to validate the
media and do it in such a way that the "new" media is different
from the "old" media. As a result the media gets remounted.

I'm not sure about 2). If you do the above properly, then explorer
will detect the media change (and also detects the new media is
different from the old one) and therefor it could be that it closes
all windows for the "old" media. However, it could also be (more likely)
that it tries to reload the contents of the showing directory; since
it's essentially the same media the windows just refreshes. If so, then
you'll end up with cached data again (you could deny access after the
media change though).

BTW, you have not stated your original problem for which you seem to
be convinced that 1) and 2) are the solutions. It could be that they
are, but it could also be that people on this forum see different
solutions! Give it a go....

Hope this helps.

cheers,
	Peter

Robert Fernando wrote:
>
> Hi all,
>
> 1: What is the best way from inside a filter device driver make nt 4.0 +
> invalidate the contents of a cached cdrom drive ie cache flush.
>
> 2: What is the best way from a win 32 program , to automatically close
down
> all the windows asociated with a a given cd rom browsed from my computer.
>
> Thanks
>  Robert Fernando
>
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