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xen-devel
Re: [Xen-devel] exception looking up device number f,or hda
Hi Arun,
I just pulled the latest unstable and could not reproduce. I have an
identical scenario (no /dev/hda only /dev/sda due to SATA).
Also, if the devno resolution code fails you should also get a vbd:
Device not found exception in the logs. The exception you are seeing is
not actually a problem, it just means that stat has failed.
We should probably cleanup that error message.
Can you post a more complete log file? I think the error is being
caused somewhere else.
Thanks,
Anthony Liguori
Arun Sharma wrote:
Hi Mike,
I have the following line in my config file:
disk = [ 'file:/var/images/min-el3-i386.img,hda,w' ]
and my host doesn't have a /dev/hda (it has a SATA disk which shows up
as /dev/sda).
But I would like the guest to see a /dev/hda. Sounds reasonable?
Now, when I try to create this domain, I get:
[2005-08-05 14:40:53 xend] DEBUG (blkif:24) exception looking up
device number for hda: [Errno 2] No such file or directory: '/dev/hda'
2005-08-05 14:40:53 xend] DEBUG (blkif:449) Destroying blkif domain=1
[2005-08-05 14:40:53 xend] DEBUG (blkif:337) Destroying vbd domain=1 id=0
The code in util/blkif.py that tries to convert name to device number
doesn't seem to be new, but I don't know why it started showing up
suddenly.
I worked around by manually creating /dev/hda, but I don't think it's
reasonable to expect that host's /dev contains entries for all guest
devices.
Also, the effect of having a bad "disk=" line in xmdefconfig (such as
pointing to a non-existent file) results in a xend crash. We probably
need to add a few checks at the python level so that the user sees a
more useful stack trace.
-Arun
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