Re: [Xen-users] How to add 2 physical scsi drives to ubuntu fileshare VM on XCP 0.50

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

David Oh wrote:
> I'm now going for my second domU - a fileserver running Ubuntu 
> 10.04LTS 64-bit server but I have one question:
> I have 2 500GB SCSI drives full of files (one formatted as EXT3, the 
> other XFS) I'd like the fileshare domU I'm going to create to access 
> these disks directly (or flow through some sort of virtual 
> container) without having to reformat or migrate.  My desire is to 
> be able to take these drives out and plug them into another machine 
> without having to do much fussing around to access the files.
As I read it - you have these disks full of files, you want to mount 
them on the DomU, and then share them from that ?
Just add additional virtual disk declarations to your client config 
and they'll appear to the client. There are two ways to do it, which 
you choose is a matter of personal preference and what else you run 
on the machine.

Option 1 : give the whole disk to the client.

In the client config on your Dom0, give the device name of the whole 
disk (eg /dev/sdc) as the device.
Eg:
disk = [ 'phy:/dev/vg0/filesrversystem,xvda1,w', 'phy:/dev/sdc,xvda2,w' ]

In the DomU, you'll now find you have a disk (/dev/xvda2 in this 
case) that is partitioned - so you'd mount /dev/xvda1 etc.

Option 2 : pass individual partitions

This is what I do - partly because I run multiple clients and have a 
lot of LVM volumes all on the same (raid) disk. Eg :
disk    = [ 'phy:/dev/vg0/filesrverroot,xvda1,w', 
'phy:/dev/vg0/filesrvervar,xvda2,w', 'phy:/dev/vg0/filesrver 
swap,xvda3,w', 'phy:/dev/sdc1,xvda2,w' ]
assuming in this case that /dev/sdc1 is the partition with all your 
files on it.
--
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.

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