[Xen-users] Re: Can I mount the xen image file while vm is running

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

maddie wrote:
> If i mounted the VM READ only then would the data getcorrupted  ? ? ?
But you need to remember that what is on the physical storage is 
**NOT** the contents of the file system (in general). The DomU will 
have unwritten changes help in ram - the contents of storage are as 
you would find after pulling the power plug !
Even if you sync the disk in DomU, then future changes would not be 
'noticed' by Dom0 - or rather they may or may not depending on what 
is currently cached in Dom0 and when it reads stuff from the disk 
relative to when the DomU writes it.
Since most os's will keep some key filesystem information in memory, 
it's not likely that the version 'known' to Dom0 will stay valid for 
long.
--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users