[DOC] snappy on KVM recommends cmd line that warns about RAW devices

[Simos Xenitellis ]

The documentation at
https://developer.ubuntu.com/en/snappy/start/

mentions

Now you can launch this virtual machine with KVM:

$ kvm -m 512 -redir :8090::80 -redir :8022::22 ubuntu-15.04-snappy-amd64-generic.img

However, this command line produces the warning:

"WARNING: Image format was not specified for 'ubuntu-core-16-amd64.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.)"

The solution is to adapt the command line, as follows:

kvm -m 512M -redir :8090::80 -redir :8022::22 -drive format=raw,file=ubuntu-core-16-amd64.img

[John Lenton (chipaca)]

Instructions on https://ubuntu.com/download/iot/kvm no longer have this issue.