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Re: I/O errors in Linux domUs

On Mon, 31 Aug 2009 09:05:21 +0200
Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:

> On Mon, Aug 31, 2009 at 11:21:08AM +1000, Christian Lerrahn wrote:
> > Hi,
> > I have a setup running where a NetBSD/amd64 dom0 hosts several Linux
> > domUs. All domUs have image files not partitions. So far, this is
> > just a test setup and I'm using images from stacklet.com (formerly
> > jailtime.org). However, I tried the Debian Etch (not available any
> > more) 64 bit, Debian Lenny 64bit and Gentoo 2008.0 64bit and always
> > had problems with I/O errors. While the Etch image ran ok for a
> > while, it started throwing errors when I moved it over to a freshly
> > installed NetBSD 5.0.1 (before it was on an older NetBSD-CURRENT).
> > The other 2 would throw errors either on boot or as soon as I tried
> > to edit a config file. All image files are ext3
> Are you sure these images are not sparse files ? NetBSD doesn't
> support a sparse file as backing store for virtual disks (this
> is a vnd(4) limitation).
> Comparing the outputs of ls -l and du on the image file should tell
> you if it's sparse or not ...

Thanks for the hint. Never thought of that. You were right. While ls
would show me an image of 1GB, du only gives me about 250MB. I'll have
to make a copy that isn't sparse on a Linux system somewhere, I suppose.


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