[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-discuss] Multiple snapshots with one guest user

From: Alberto Garcia
Subject: Re: [Qemu-discuss] Multiple snapshots with one guest user
Date: Wed, 25 Jan 2017 09:38:32 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

On Thu, Jan 19, 2017 at 03:20:33PM +0330, Mahmood Naderan wrote:
> May i ask what is the difference between the following commands
> 1) qemu-img create -o backing_file base.img new.img 10G
> 2) qemu-img create -f qcow2 -b base.img new.img

There's several things here:

  # "-o backing_file=base.img" and "-b base.img" are equivalent.

  # In (1) you're missing the '=' in backing_file=base.img

  # If (1) you're also not specifying the file format, then it
    defaults to raw. But raw does not support backing files, so the
    command will not work.

  # qcow2 does support backing files, that's why (2) works.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]