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ƒq n|	S(	sReturn a list of devices that may contain the config drive.

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       instance", and should be VFAT.
       Currently, we do not restrict search list to "last available disk"

    config drive v2:
       Disk should be:
        * either vfat or iso9660 formatted
        * labeled with 'config-2' or 'CONFIG-2'
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