WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Centos + Xen 3.0 + Root on md = bad

To: larsks.21230602@xxxxxxxxxxxxx
Subject: Re: [Xen-users] Centos + Xen 3.0 + Root on md = bad
From: Taneli Leppä <taneli@xxxxxxxxxx>
Date: Thu, 15 Dec 2005 10:18:13 +0200
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 15 Dec 2005 08:20:13 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1134573204.2310814296.31478.sendItem@xxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
Organization: Crasman Co Ltd
References: <1134573204.2310814296.31478.sendItem@xxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mail/News 1.6a1 (Windows/20051206)
Hi again,

larsks.21230602@xxxxxxxxxxxxx wrote:
That gives me two other questions:
(1) This is for the folks at Xensource responsible for the binary distribution
-- if md support under Xen requires the md drivers to be compiled into the
kernel, why does the binary distribution from Xensource have them built as
modules?

I believe they expected them to work - and they should work.
But they don't, for some reason. :-)

(2) I've tried adding mdadm to the initrd, and it complains that
/dev/md0 and /dev/md1 don't exist.  In fact, they *do* exist on the initrd
filesystem *prior* to starting udev; after udev starts I'm not positive (didn't
have much time to fiddle with it this morning).  Even running mdadm with 
--auto=yes
fails to create the device nodes.  *Should* this work?  Or is it simply not
possible to use the md drivers built as modules under the Xen kernel?

Yeah, I believe it has something to do with either udev or
the modules themselves. All RAID autorun requires is a simple
ioctl() call to the md driver, but it's returning ENODEV. The
compiling in of modules is a good enough solution for me, so
I haven't looked more into this.

--
  Taneli Leppä         | Crasman Co Ltd
  <taneli@xxxxxxxxxx>  | <http://www.crasman.fi/>

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

<Prev in Thread] Current Thread [Next in Thread>