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QEMU-NBD

Section: (8)
Updated: 2015-03-18
Index Return to Main Contents
 

NAME

qemu-nbd - QEMU Disk Network Block Device Server  

SYNOPSIS

usage: qemu-nbd [OPTION]... filename  

DESCRIPTION

Export QEMU disk image using NBD protocol.  

OPTIONS

filename
 is a disk image filename

-p, --port=port
  port to listen on (default B<10809>)

-o, --offset=offset
  offset into the image

-b, --bind=iface
  interface to bind to (default B<0.0.0.0>)

-k, --socket=path
  Use a unix socket with path I<path>

-f, --format=format
  Set image format as I<format>

-r, --read-only
  export read-only

-P, --partition=num
  only expose partition I<num>

-s, --snapshot
  use I<filename> as an external snapshot, create a temporary
  file with backing_file=I<filename>, redirect the write to
  the temporary one

-l, --load-snapshot=snapshot_param
  load an internal snapshot inside I<filename> and export it
  as an read-only device, I<snapshot_param> format is
  'snapshot.id=[ID],snapshot.name=[NAME]' or '[ID_OR_NAME]'

-n, --nocache
--cache=cache
  set cache mode to be used with the file.  See the documentation of
  the emulator's C<-drive cache=...> option for allowed values.

--aio=aio
  choose asynchronous I/O mode between B<threads> (the default)
  and B<native> (Linux only).

--discard=discard
  toggles whether I<discard> (also known as I<trim> or I<unmap>)
  requests are ignored or passed to the filesystem.  The default is no
  (B<--discard=ignore>).

-c, --connect=dev
  connect I<filename> to NBD device I<dev>

-d, --disconnect
  disconnect the specified device

-e, --shared=num
  device can be shared by I<num> clients (default B<1>)

-f, --format=fmt
  force block driver for format I<fmt> instead of auto-detecting

-t, --persistent
  don't exit on the last connection

-v, --verbose
  display extra debugging information

-h, --help
  display this help and exit

-V, --version
  output version information and exit

 

SEE ALSO

qemu-img(1)  

AUTHOR

Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHOR


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