19.3. Disk Options
19.3. Disk Options This section provides information about disk options. Generic Drive -drive <option>[,<option>[,<option>[,...]]] Supported with the following options: readonly [on|off] werror [enospc|report|stop|ignore] rerror [report|stop|ignore] id =<id> Id of the drive has the following limitation for if=none: IDE disk has to have <id> in following format: drive-ide0-<BUS>-<UNIT> Example of correct format: -drive if=none,id=drive-ide0-<BUS>-<UNIT>,... -device ide-drive,drive=drive-ide0-<BUS>-<UNIT>,bus=ide.<BUS>,unit=<UNIT> file =<file> Value of <file> is parsed with the following rules: Passing floppy device as <file> is not supported. Passing cd-rom device as <file> is supported only with cdrom media type (media=cdrom) and only as IDE drive (either if=ide or if=none + -device ide-drive). If <file> is neither block nor character device, it must not contain ':'. if =<interface> The following interfaces are supported: none, ide, virtio, floppy. index =<index> media =<media> cache =<cache> Supported values: none, writeback or writethrough. copy-on-read =[on|off] snapshot =[yes|no] serial =<serial> aio =<aio> format =<format> This option is not required and can be omitted. However, this is not recommended for raw images because it represents security risk. Supported formats are: qcow2 raw Boot Option -boot [order=<drives>][,menu=[on|off]] Snapshot Mode -snapshot