[Xen-users] Re: How to Backup and Restore MBR within Logical Volumes?

[Mr. Teo En Ming (Zhang Enming)]

Hi,

I don't think I will be using the LVM snapshot method. I will simply ensure
that my domU is not running, then I proceed to do the losetup and kpartx
procedure. Subsequently I will backup the MBR of my domU by dd-ing
/dev/loopX and clone all the filesystems of the domU using fsarchiver.

I would like to use fsarchiver because it can support LZMA compression. LZMA
can compress better than bzip2 and decompress 3x faster than bzip2.
partimage only supports gzip and bzip2.

-- 
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
Engineering)
Alma Maters:
(1) Singapore Polytechnic
(2) National University of Singapore
My Primary Blog: http://teo-en-ming-aka-zhang-enming.blogspot.com
My Secondary Blog: http://enmingteo.wordpress.com
My Youtube videos: http://www.youtube.com/user/enmingteo
Email: space.time.universe at gmail.com
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Street: Bedok Reservoir Road
Country: Singapore

On Thu, Nov 12, 2009 at 10:02 AM, Fajar A. Nugraha <fajar at fajar.net> wrote:

> On Thu, Nov 12, 2009 at 4:52 PM, Mr. Teo En Ming (Zhang Enming)
> <space.time.universe at gmail.com> wrote:
> > Now I can proceed with writing the
> > backup and restore script for my Fedora 11 Dom0 (all partitions using
> LVM2
> > logical volumes) and all of my Xen virtual machines (contained in logical
> > volumes).
>
> A reminder though: don't forget to create a "consistent", unchanging
> version of domU storage before doing backup. Either by shutting down
> domU, or by creating LVM snapshot first.
>
> Also, if it comes to Windows domUs, I find ntfsclone is better than
> fsarchiver. One of the reasons is that fsarchiver can not create
> compressed files during restore.
>
> --
> Fajar
>
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