From owner-freebsd-questions@FreeBSD.ORG  Wed Oct 13 22:46:45 2004
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Date: Wed, 13 Oct 2004 17:46:42 -0500
From: terry tyson <beebum@gmail.com>
To: Laszlo Antal <lantal@tmail.com>
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cc: freebsd-questions@freebsd.org
Subject: Re: Unable to umount Cdrom drive.
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On Wed, 13 Oct 2004 11:22:12 -0700, Laszlo Antal <lantal@tmail.com> wrote:
> Hi,
> 
> I have FreeBSD 4.10 installed.
> When I mount the cdrom with #mount -t cd9660 /dev/acd0c /cdrom
> everything works fine.I can get to my ports and everything
> But when I want to swap cds and I type #umount /cdrom
> I get this error message:: Unable to umount /cdrom, Device is busy.
> If I do the umont from KDE I get the same error message.
> What I'm doing wrong??
> 
> Thank you for all the help.
> 
> Laszlo
 
Try
# umount /dev/acd0c
HTH
-- 
Terry