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Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help. |
Date: |
Mon, 12 May 2014 09:53:56 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
On 05/12/2014 09:36 AM, Mike Day wrote:
> On Mon, May 12, 2014 at 11:20 AM, Eric Blake <address@hidden> wrote:
>> Online where? In 'qemu-img --help', or on some web page (at what URL)?
>
> http://qemu.weilnetz.de/qemu-doc.html#vm_005fsnapshots
Not an official qemu reference; nothing we can do about out-of-date
third-party references.
>
> -o backing file is not documented in the help command.
Ah, but it is:
$ qemu-img create -f qcow2 -o help
Supported options:
size Virtual disk size
compat Compatibility level (0.10 or 1.1)
backing_file File name of a base image
backing_fmt Image format of the base image
encryption Encrypt the image
cluster_size qcow2 cluster size
preallocation Preallocation mode (allowed values: off, metadata)
lazy_refcounts Postpone refcount updates
and more importantly, it only appears in the help output of -f modes
that actually support a backing file. Contrast:
$ qemu-img create -f raw -o help
Supported options:
size Virtual disk size
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help.,
Eric Blake <=
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/13
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12