[Linux-cluster] How backup domU partition from dom0?

[Miguel Sanchez]

Fajar A. Nugraha escribió:
> On Fri, Sep 4, 2009 at 7:08 PM, Miguel Sanchez<ntadmin at fi.upm.es> wrote:
>   
>> Hi. I have two hosts forming a cluster for run xen vm's. Each vm has a disk
>> which is corresponding to a clvm logic volume within dom0.
>> I pretended to backup the lv's from dom0 doing a 'kpart -a' and a readonly
>> mount (with the vm running). Probably it is not very correct (but the
>> alternative snapshot was not possible with clvm).
>>     
>
> Did you know that if you mount an ext3 partition READ ONLY you could
> actually do a WRITE to that partition to replay the journal, and so
> cause possible data corruption?
>   
No, I don't. Then could the partition within dom0 be defined readonly with 'blockdev --setro' and avoid any write, direcly in the data as well as possible replaying the journal?

--
Miguel.