Re: [Xen-users] About installing Virtual Machines in the same hdd partition

["Fajar A. Nugraha" <fajar@xxxxxxxxxxxxx>]

Miguel Gómez wrote:

> The problem comes when I thing about installing a new Virtual Machine, 
> I would not like to create a new partition in my hard disk to store 
> the new virtual machine, what I would like to do is to have the same 
> filesystems being shared by all the running Virtual Machines, plus 
> Xen. Can I do this?
Short answer : No.

Long answer:
Linux requires some part of filesystem (/var, /tmp, etc.) to be 
available read-write.
Generally, you cannot (and should not) mount a partition (or any block 
device, or even loopback file system) read-write twice (or more) at the 
same time because it will cause inconsistency and data loss. You can, 
however, mount a block device read-only on multiple domains for some 
parts of file system (namely /usr). See 
http://www.cl.cam.ac.uk/Research/SRG/netos/xen/readmes/user/user.html#SECTION02330000000000000000
If you don't want to create another partition, you can use file-backed 
VBDs, or use LVM (recommended).
Regards,

Fajar



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