[Fedora-xen] extending size of image

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John writes:
So maybe this should be corrected in that web page.
I have a question:
Can the size of a file which was created thus
(dd if=/dev/zero of=fedora.img bs=1M count=1 seek=1024)
be changed ***without*** causing a damage to its contents?
In case there is such a way, how can it be done ?
Regards,
John

When managing UML images, I typically create a new image of the same size and then rsync across them. This is not the most efficient, but it is the most reliable. I've tried changing the seek parameter of an image using dd for an image, but I've found that resizing filesystem often fails or does not take effect.

You could try changing the seek of the image and then running resize2fs against it, but I'd bet you $1 you'd lose that data. Safer to try something like this:
dd if=/dev/zero of=additional.img ...
cat fedora.img additional.img > new.img
resize2fs new.img

I'm sure there's other ways. I've seen this discussed on the user-mode-linux.org site.

Jed


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