Re: [Xen-users] Problem iscsi on domU

["Todd Deshane" <deshantm@xxxxxxxxx>]

On Thu, Jul 3, 2008 at 8:30 AM, Dustin Henning <Dustin.Henning@xxxxxxxxxxx> wrote:

       I don't have any experience in this department at all, but what if
you make your main disk hda or xvda (don't even know where and/or how xvda
should work) instead of sda?  If there is some bug forcing your iscsi to
connect to sda, that may allow it to work.  The real question is how much
additional configuration it would take to get this working after that and
whether or not it's worth the effort for a shot in the dark.
       Dustin

That reminds me, there was some development in making a iscsi: disk type (similar
to tap:aio, phy:), maybe looking for the status of that work may help?

 

 

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Lino Moragon
Sent: Wednesday, July 02, 2008 04:00
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Problem iscsi on domU

Todd Deshane wrote:
>
>
> On Tue, Jul 1, 2008 at 2:36 AM, Lino Moragon
> <lino.moragon@xxxxxxxxxxxx <mailto:lino.moragon@xxxxxxxxxxxx>> wrote:
>
>     Todd Deshane wrote:
>
>
>
>         On Mon, Jun 30, 2008 at 5:46 AM, Lino Moragon
>         <lino.moragon@xxxxxxxxxxxx <mailto:lino.moragon@xxxxxxxxxxxx>
>         <mailto:lino.moragon@xxxxxxxxxxxx
>         <mailto:lino.moragon@xxxxxxxxxxxx>>> wrote:
>
>            Hi list,
>
>            I'm having troubles to get an iscsi initiator working on a
>         domU.
>            As dom0 and domU I use a Centos 5 with the 2.6.18-53.1.14.el5
>            xen-kernel.
>            As iscsi initiator i use the iscsi-initiator-utils of the
>         Centos5
>            repo.
>            The problem is, that when I log in to my iscsi target on
>         the domU
>            it is recognized as /dev/sda1.
>            Now sda1 is also my root partition on the domU. And when I
>         mount
>            it I've mounted the root partition and not the iscsi device.
>
>            Has anyone had this problem yet? Is there a solution to make it
>            recognized as e.g. /dev/sdb ?
>
>            Any help and tips would be appreciated.
>
>
>         You should be able to setup a udev rule that will recognize
>         the drives and correctly set them up.
>
>         take a look here:
>         http://www.performancemagic.com/iscsi-xen-howto/iSCSI.html
>
>     Hi,
>
>     Thanks for your response. I just tried it that way.
>     Only problem is, that it creates a link that links to the same
>     /dev/sda1.
>     So if I mount the new /dev/iscsi_11 device it will mount again the
>     root filesystem.
>     Are there other possible options? Or isn't it at all possible?
>
>
> Take a look at:
> /dev/disk/by-uuid/
If I look at by-uuid i only get my "real" scsi device:
lrwxrwxrwx 1 root root 10 Jul  2 08:49
efd01d87-9b04-4d65-976c-cea045f51137 -> ../../sda1

Also for the by-id:
lrwxrwxrwx 1 root root 10 Jul  2 08:49
efd01d87-9b04-4d65-976c-cea045f51137 -> ../../sda1

And for the path there is my iscsi entry:
lrwxrwxrwx 1 root root 10 Jul  2 08:50
ip-172.16.10.70:3260-iscsi-iqn.1994-05.com.redhat:storage.mysql-part1 ->
../../sda1

But it is also linked to sda1 ... Problem is that udev doesn't seem to
create a "new" block device like sdb...

Any ideas?

 Thanks, Lino

>
>
>
>     Thanks for some hints.
>
>     Regards, Lino
>
>
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-- 
Todd Deshane
http://todddeshane.net
check out our book: http://runningxen.com
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