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= Error Messages =
 Error: Can't read superblock :: In order to mount a NFS network file system, it is necessary to run the portmapper on the client computer. An error may occur, if an attempt is made to mount a NFS network file system without the local portmapper running:
  {{{
 mount scooby:/foobar /nfs/scooby/foobar mount: scooby:/foobar Can't read superblock
}}}
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= Resources =

["Mini"]


The Network File System (NFS) was developed to allow machines to mount a disk partition on a remote machine as if it were on a local hard drive. This allows for fast, seamless sharing of files across a network.

It also gives the potential for unwanted people to access your hard drive over the network (and thereby possibly read your email and delete all your files as well as break into your system) if you set it up incorrectly. So please read the Security section of this document carefully if you intend to implement an NFS setup.

There are other systems that provide similar functionality to NFS. ["Samba"] (http://www.samba.org) provides file services to Windows clients. The Andrew File System from IBM (http://www.transarc.com/Product/EFS/AFS/index.html), recently open-sourced, provides a file sharing mechanism with some additional security and performance features. The Coda File System (http://www.coda.cs.cmu.edu/) is still in development as of this writing but is designed to work well with disconnected clients. Many of the features of the Andrew and Coda file systems are slated for inclusion in the next version of NFS (Version 4) (http://www.nfsv4.org). The advantage of NFS today is that it is mature, standard, well understood, and supported robustly across a variety of platforms.

Error Messages

Error: Can't read superblock
In order to mount a NFS network file system, it is necessary to run the portmapper on the client computer. An error may occur, if an attempt is made to mount a NFS network file system without the local portmapper running:
  •  mount scooby:/foobar /nfs/scooby/foobar mount: scooby:/foobar Can't read superblock

Resources