Editing How to enable NFS on the Synology Server

__NOTOC__
This is a guide on how to enable the [[wikipedia:Network File System (protocol)|NFS]] capabilities of the Synology product.
<br>This procedure is aimed for users who are experienced with Telnet and the Linux Operating System
<br>Please note that improper manipulation or modification of the Synology server may result in machine malfunction or loss of data.
<br>Please read the [[General_Disclaimer_on_Modifying_the_Synology_Server|General Disclaimer]] before modifying the Synology product.

==Acquire Files==
Please make sure that the Synology product has firmware 2.0.3 - 0518 or above, along with the [[How_to_Enable_Telnet|Telnet service]] enabled. <br>Both files can be found [http://www.synology.com/enu/support/download.php here].


==Instructions for the NFS Server==
Telnet into the Synology product and perform the following

===Enabling Service===
With DSM-5.1 it's already there.
<pre>
cd /usr/syno/etc/rc.sysv
mv S83nfsd.sh.sample S83****.sh
reboot (or /usr/syno/etc/rc.d/S83****.sh start)
vi /etc/exports 
</pre>
Note: <nowiki>*</nowiki> needs to be replaced with a number

Note, in newer versions (DSM4), the <code>/usr/syno/etc/rc.d/S83nfsd.sh</code> will already exist. If you try to "<code>start</code>" it, you will get a message telling you that "<code>NFS server is not enabled. Skip...</code>"

You'll need to edit the <code>/etc/synoinfo.conf</code> file and add <code>runnfs="yes"</code>.  Then you'll be able to run <code>/usr/syno/etc/rc.d/S83nfsd.sh start</code>

===Exports file===
In the exports file, add the following line
<pre>
/directory/to/export ip.of.NFS.client(ro,root_squash,no_subtree_check)
</pre>

Save the export file

Check if the file /var/lib/nfs/rmtab does exist, if not, then run the following command
<pre>
touch /var/lib/nfs/rmtab
</pre>

Now perform the following command
<pre>
cd /
/usr/sbin/exportfs -a
</pre>

===Testing===
Look at /var/log/messages to check whether the settings are ok with your Synology product


==Instructions for Linux NFS Client==

On your NFS client, perform the following to mount the NFS Server share
<pre>
mount IP.of.NFS.Server:/directory/to/export /volume1/local/share/folder
</pre>
Note: /volume1/local/share/folder must exist locally, otherwise the mount will fail

<div style="border:1px solid black">
'''Important:''' NFS on the Synology Server is case-'''insensitive''' (as of November 8, 2008; [http://www.synology.com/enu/forum/viewtopic.php?f=3&p=45501 this may change in a later firmware version]).  This means if you perform backups by (say) [http://www.samba.org/rsync rsync], and the source directory contains files named "Foo" and "foo", the destination directory will contain only '''one''' of these files, as "Foo" ovewrites "foo" case-insensitively. This behavior happens silently.
'''Update: DSM is case-sensitive over NFS since DSM 2.1'''
</div>

==Notes==
The NFS Service is disabled after every firmware upgrade.
<br>The NFS mount is not shown in the web interface
<br>Files saved on the Synology server are case-insensitive. 
<br>Supported versions:
:NFS 2.0
:NFS 3.0
:NFS 4.0

== MTU Jumbo frames ==
For some NFS clients (eg. TViX 6500/7000), errors are reported if jumbo frames are enabled. Mounting the NFS is possible: try disabling the jumbo frames setting in the Synology Disk Station Manager -> system -> network.

==Additional Resources==
[http://www.synology.com/enu/forum/viewforum.php?f=41 Synology NFS Forum Room]
<br>[http://www.faqs.org/docs/securing/chap5sec33.html The /etc/exports file]
<br>[http://www.redhat.com/docs/manuals/linux/RHL-7.3-Manual/custom-guide/s1-nfs-mount.html Mounting NFS File Systems]
<br>[[Windows Services for UNIX 3.5 Fast Setup Guide]]
<br>[[Export Filesystem as NFS]]

[[Category:SynologyWiki]]
[[Category:ToBeExported]]