Provided by: nbd-client_2.8.3-1_i386
nbd-client - connect to a server running nbd-server(1), to use its
exported block device
nbd-client [ bs=blocksize ] host port nbd-device [ -swap ]
nbd-client -d nbd-device
This manual page documents briefly the nbd-client command.
This manual page was written for the Debian GNU/Linux distribution
because the original program does not have a manual page.
With nbd-client, you can connect to a server running nbd-server, thus
using raw diskspace from that server as a blockdevice on the local
To do this, support from the Linux Kernel is necessary, in the form of
the Network Block Device (NBD). When you have that, either in the
kernel, or as a module, you can connect to an NBD server and use its
exported file through a block special file with major mode 43.
The following options are supported:
Use a blocksize of "blocksize". Default is 1024; allowed values
are either 512, 1024, 2048 or 4096
host The hostname of the machine running nbd-server.
port The TCP port on which nbd-server is running at the server.
The block special file this nbd-client should connect to.
-swap Specifies that this NBD device will be used as swapspace. If you
intend to do that, please use this option to prevent deadlocks.
You’ll need a special kernel patch, available at NBD’s homepage:
Some examples of nbd-client usage:
· To connect to a server running on port 2000 at host
"server.domain.com", using the client’s block special file
nbd-client server.domain.com 2000 /dev/nd0
· To connect to a server running on port 2001 at host
"swapserver.domain.com", using the client’s block special file
"/dev/nd1", for swap purposes:
nbd-client swapserver.domain.com 2001 /dev/nd1 -swap
· To disconnect the above connection again (after making sure the block
special file is not in use anymore):
nbd-client -d /dev/nd1
The NBD kernel module and the NBD tools have been written by Pavel
The kernel module is now maintained by Paul Clements
(Paul.Clements@steeleye.com), while the userland tools are maintained
by Wouter Verhelst (firstname.lastname@example.org)
This manual page was written by Wouter Verhelst (<email@example.com>)
for the Debian GNU/Linux system (but may be used by others).
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU General Public License, version 2, as
published by the Free Software Foundation.
22 december 2005 NBD-CLIENT(8)