Troubleshooting NFS

Most problems involving NFS network services lie in one of the following areas:

• ``Slow network adapters''

• ``Network and server problems''

• ``rnode table overflow''

• ``Remote mount failed''

• ``Programs are hung''

• ``Everything works slowly''

• ``Validation errors''

• ``Nonexistent NFS server''

• ``Troubleshooting failed lock requests''

• ``Clock skew in user programs''

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 Command           Function
 -----------------------------------------------------------------
 rpcinfo(NADM)     displays RPC information from a specified RPC
                   server. Use rpcinfo to make sure theportmapper 
                   (/etc/portmap) is running and to ensure the
                   Network Lock Manager is running.  If exporting
                   filesystems, the mountd service should be
                   registered.
 showmount(NADM)   displays the clients that have remotely mounted
                   filesystems from a specified server.
 nfsstat(NADM)     displays statistical information about NFS and
                   about Remote Procedure Call (RPC) interfaces to
                   the kernel; can also be used to reinitialize
                   this information.
 netstat(TC)       displays statistical information about TCP/IP;
                   it is particularly helpful for identifying
                   physical network problems.
 ping(ADMN)        reports roundtrip time and packet loss
                   statistics.  Use ping to ensure a network
                   connection can be made between hosts.

See also:

• Chapter 13, ``Troubleshooting system-level problems'' in the SCO OpenServer Handbook

• ``Troubleshooting TCP/IP''