NAME
nbd-client - connect to a server running nbd-server(1), to use its exported block device
SYNOPSIS
nbd-client [ bs=blocksize ] host port nbd-device [ -swap ]
nbd-client -d nbd-device
DESCRIPTION
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
client.
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.
OPTIONS
The following options are supported:
bs=blocksize
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.
nbd-device
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:
http://atrey.karlin.mff.cuni.cz/~pavel
EXAMPLES
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
"/dev/nb0":
nbd-client server.domain.com 2000
/dev/nb0
To connect to a server running on port 2001 at host
"swapserver.domain.com", using the client's block special
file "/dev/nb1", for swap purposes:
nbd-client swapserver.domain.com 2001 /dev/nb1
-swap
To disconnect the above connection again (after making
sure the block special file is not in use anymore):
nbd-client -d /dev/nb1
SEE ALSO
nbd-server (1).
AUTHOR
The NBD kernel module and the NBD tools have been written by
Pavel Macheck (pavel@ucw.cz).
The kernel module is now maintained by Paul Clements
(Paul.Clements@steeleye.com), while the userland tools are maintained by
Wouter Verhelst (wouter@debian.org)
This manual page was written by Wouter Verhelst (<wouter@debian.org>) 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.
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