You probably know all of these things, but for myself, it
never hurts to stare the obvious in the face. I'm hardly
an expert with UML yet.
1.) Is the ubd0 file in the root of the host or the UML
root filesystem. I made this mistake once not a long time
ago. (I looked more carefully, and it looks like it's
in the UML root filesystem.
2.) Did you unmount the root_fs filesystem? Maybe the ubd0
file is not yet written to the disk on the host, and so
UML can't see it. I would guess that using a disk file
as a UML root and a mounted file system would end up
making you very sad. You would get pretty massive
file system corruption. I don't know how fragile Linux
is in this way, but I suspect it's pretty fragile.
3.) I found I had a lot of problems until I added an explicit
"mem=256M" on the command line. For one thing, COW files
did not work properly, and my root file systems kept getting
corrupted. You can choose different amounts of memory, of
course.
4.) I would make a ubd0 file with "mknod --mode=0666 udb0 b 98 0"
explicitly, and not depend on cp doing the right thing. (This
may not be the exact right command.)
Hope this helps.
Dhirendra Pal Singh wrote:
Hi All,
I apologies for asking this small question, but I have looked at all the
places, searched the google and done all what I could for last 2 days.
...
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