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xen-devel
Re: [Xen-devel] xen and reiserfs
On Mon, 21 Feb 2005, Jim Martin wrote:
Hi
I'm running Xen on Fedora core 3...
uname -a
Linux groucho 2.6.10-1.1148_FC4xen0 #1 SMP Sat Feb 19 15:15:24 EST 2005 i686
i686 i386 GNU/Linux
# xm list
Name Id Mem(MB) CPU State Time(s) Console
Domain-0 0 121 0 r---- 140.9
What I'm trying to do is get SuSE 9.2 to come up in it's own domain..
/dev/hda2 = root for FC-3
/dev/hdb2 = root for SuSE 9.2
My config file in /etc/xen (suse)
# cat suse
kernel ="/boot/vmlinuz-2.6.10-1.1148_FC4xenU"
memory = 64
name = "suse"
nics = 1
disk = ['phy:hdb2,hdb2,w']
root = "/dev/hdb2 ro"
My problem...
When I run 'xm create -c suse' everything seems fine right up to the point of
mounting root and I get this error:
md: ... autorun DONE.
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(3,66)
<0>Rebooting in 1 seconds..
This is a reiserfs /dev/hdb2 - does this xen kernel support reiserfs ?
Or is my config file wrong ?
Xen kernels have no problem with reiserfs (indeed, they should work with
any filesystem). Your problem is due to the fact that you are booting with
a Fedora kernel, which unlike (IIRC) the suse kernels, has reiserfs as a
module, not compiled in.
Not to worry, all you have to do is add an initrd line. Unfortunately,
the kernel-xenU package from Fedora does not currently ship with an
initrd, so I think you'll have to build one yourself. Try this command
(I haven't tested it, but it should work):
mkinitrd /boot/initrd-2.6.10-1.1148_FC4xenU.img 2.6.10-1.1148_FC4xenU
Then add
ramdisk=/boot/initrd-2.6.10-1.1148_FC4xenU.img
to your config file in /etc/xen.
The kernel will load the necessary module(s) automatically so it should
not be necessary to modify the initrd produced by mkinitrd.
Hope this helps,
--
Robin
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