From: Thomas Mueller <thomas@chaschperli.ch>
To: kvm@vger.kernel.org
Cc: qemu-devel@nongnu.org
Subject: Re: [PATCH][RFC] Use writeback caching by default with qcow2
Date: Thu, 20 Nov 2008 16:23:19 +0000 (UTC) [thread overview]
Message-ID: <gg42tn$mfc$2@ger.gmane.org> (raw)
In-Reply-To: alpine.LNX.2.00.0811200744540.3029@x9.ybpnyarg
>>
>> > or contrawise: on the other formats the metadata is updated in the
>> > correct order?
>> >
>> >
>> raw is the only format we're sure of.
>
> With that in mind I converted my qcow2 image to raw, and I'm trying to
> use that as a base image to create a new raw (writeable) image:
>
> #qemu-img create -b vista.raw vista.delta Formatting 'vista.delta',
> fmt=raw, backing_file=vista.raw, size=20971520 kB qemu-img: Formatting
> or formatting option not supported for file format 'raw'
>
> Doesn't that seem like a bug? Do people just not use raw images in this
> way?
you can only use a backing file with qcow2 IMHO. also snapshots (savevm/
loadvm) work only with qcow2.
- Thomas
prev parent reply other threads:[~2008-11-20 16:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-19 20:24 [PATCH][RFC] Use writeback caching by default with qcow2 Anthony Liguori
2008-11-19 22:27 ` Stefan Berger
2008-11-20 7:04 ` Thomas Mueller
2008-11-20 9:55 ` Avi Kivity
2008-11-20 15:53 ` walt
2008-11-20 16:23 ` Thomas Mueller [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='gg42tn$mfc$2@ger.gmane.org' \
--to=thomas@chaschperli.ch \
--cc=kvm@vger.kernel.org \
--cc=qemu-devel@nongnu.org \
/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