Hi all, whe I boot Debian-Hurd as:

qemu-system-i386 -m 512 -net nic -net user,hostfwd=tcp::5555-:22 -drive 
cache=writeback,file=debian-hurd-20150320.img &


the following output is:


WARNING: Image format was not specified for 'debian-hurd-20150320.img' and 
probing guessed raw.
         Automatically detecting the format is dangerous for raw images, write 
operations on block 0 will be restricted.
         Specify the 'raw' format explicitly to remove the restrictions.

and  then

main-loop: WARNING: I/O thread spun for 1000 iterations

How can I solve this problem and why it occurs?

Thanks Horacio

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