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

[Taneli Leppà <taneli@xxxxxxxxxx>]

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

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