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Re: [Xen-devel] xenU wont boot, cannot open root device

To: Maurice Meeden <tux@xxxxxxxx>
Subject: Re: [Xen-devel] xenU wont boot, cannot open root device
From: Derrik Pates <dpates@xxxxxxxxxx>
Date: Fri, 24 Dec 2004 00:58:17 -0500
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Maurice Meeden wrote:
I am trying to replace uml with xen, but I cant get the unpreviliged Domains
booting..
Ive tested a cuple of filesystems in a file (ext3 or xfs formatted) and Ive also
tried the ttylinux-xen image. But I always get this error:
VFS: Cannot open root device "hda1" or unknown-block(3,1)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,1)

Ive no ideas what else I could try, can somebody give me an hint please?

Are you using the prebuilt unprivileged-domain kernel image? If so, the one in 2.0.1 at least (maybe others, not sure) has devfs support enabled. This breaks things. I suggest you rebuild your domU kernel _without_ devfs support, and it should work correctly. I had this same problem when I began playing with Xen, but after rebuilding the kernel as I mentioned, it all worked correctly.

--
Derrik Pates
dpates@xxxxxxxxxx


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