Date: Mon, 9 Mar 2009 10:37:06 +0100 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: Doug Barton <dougb@FreeBSD.org> Cc: freebsd-emulation@FreeBSD.org Subject: Re: qemu 0.10.0 - cd/dvd drive access problems Message-ID: <20090309103706.0a44fb26@ernst.jennejohn.org> In-Reply-To: <49B46A29.7020500@FreeBSD.org> References: <49B46A29.7020500@FreeBSD.org>
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On Sun, 08 Mar 2009 18:00:25 -0700 Doug Barton <dougb@FreeBSD.org> wrote: > One of my main reasons for wanting to install qemu was to be able to > use Windows tools for things like archiving DVDs. Now that I have qemu > working pretty well for most things, I tried to start using it for > DVD/CD access and it's not working well at all. I installed XP via a > typical installation CD, so I thought I had it made in this area. :( > > I'm using '-cdrom /dev/acd0' the same way I did for the install. If > there is a disc in the drive when I start qemu I can "see" the disc, > and copy some small files from it. However trying to copy/read large > files (say, 1G) doesn't work at all. I get an error saying that sector > of the disc cannot be read (this is with known-good discs). I tried > with and without the cd-rom DMA compile-time OPTION, no luck. If I > remove the disc from the drive, or if there is no disc in the drive > when I start qemu, inserting one after it starts produces no results. > Every time I try to access the drive I get the "Please insert a disc > into drive D:" error message. > > I'm using a fairly up to date 8-current as the host, btw. > > > Any suggestions? > Do you have vfs_aio in your kernel or as a module? I've run openSUSE in qemu and used the DVD drive with no problems at all; I have vfs_aio in my kernel. However, I don't know how much data were transfered by openSUSE. Since I was merely loading packages from the DVD it may have been only a few MB. One thing I've noticed is that the DVD drive is locked and I can't open the drawer once qemu starts, even if there is no disc in the drive. Apparently openSUSE acceses the drive (i.e. locks it) even when it's empty. --- Gary Jennejohn
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