From: David Ahern <dsahern@gmail.com>
To: Alex Davis <alex14641@yahoo.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>, kvm@vger.kernel.org
Subject: Re: CD-ROM size not updated when switching CD-ROM images.
Date: Wed, 20 Oct 2010 10:44:15 -0600 [thread overview]
Message-ID: <4CBF1C5F.1070406@gmail.com> (raw)
In-Reply-To: <511807.4805.qm@web50208.mail.re2.yahoo.com>
On 10/19/10 18:03, Alex Davis wrote:
>> You ejected the CD-ROM on the QEMU side, the guest doesn't
>> necessarily
>> know about the medium change. What happens when you
>> use "eject
>> /dev/sr0" inside the guest instead?
> I get a 'no medium found' error from the 'dd..' command. After
> going into the the monitor, ejecting and reloading the disk,
> I still get the size of the first disk in the guest.
As I recall the old data is coming from the host page cache; it is not
seeing the media change. Try dropping the cache in the host on a media
change (echo 3 > /proc/sys/vm/drop_caches) or modify qemu to close and
reopen the cdrom device.
David
>>
>> I don't know how CD-ROM media change works on real
>> hardware, but that
>> is the behavior that QEMU should be following.
>>
>> Stefan
>
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
next prev parent reply other threads:[~2010-10-20 16:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-19 3:43 CD-ROM size not updated when switching CD-ROM images Alex Davis
2010-10-19 8:31 ` Stefan Hajnoczi
2010-10-20 0:03 ` Alex Davis
2010-10-20 16:44 ` David Ahern [this message]
2010-10-20 23:28 ` Alex Davis
2010-10-30 20:32 ` Alex Davis
-- strict thread matches above, loose matches on Subject: below --
2010-10-20 12:50 Alex Davis
2010-10-30 21:24 Alex Davis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4CBF1C5F.1070406@gmail.com \
--to=dsahern@gmail.com \
--cc=alex14641@yahoo.com \
--cc=kvm@vger.kernel.org \
--cc=stefanha@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox