NFS advanced mount options
The Filesystem Manager supports the following
mount options for NFS filesystems:
Mount in background
the NFS mount should be retried in the background if the
server's mount daemon (mountd) does not respond.
This is recommended for automatic mounts done during system startup.
The default is to mount in the foreground.
This is recommended if you wish to see whether the mount
Type of Mount
specifies how the client acts if the
server does not respond to its NFS request.
retries indefinitely. The client will continue to attempt the NFS
file operation indefinitely if the operation fails.
Hard mounts should be used when
the server and the link to the server are known to be reliable.
Hard mounts with the interruptible option enabled is
the recommended method of mounting remote filesystems.
The default is hard mount.
retries NFS file operation n times as set by the
number of retries before reporting error option;
returns error if no server response in n tries.
Soft mounts are recommended for filesystems whose servers are
considered unreliable, or if the link is slow. Unlike spongy mounts,
soft mounts may time out during read and write operations.
sets soft semantics for stat, lookup,
fsstat, readlink, and
readdir NFS operations and hard semantics
for all other NFS operations on the filesystem.
Spongy mounts are preferable to soft mounts because spongy
mounts will not time out during read and write operations.
They are recommended for slow, long-distance, or
unreliable links, and for unreliable servers.
Allow Keyboard Interrupts
allows keyboard interrupts on hard mounts.
allows the user to kill a process that is hung while
waiting for a response on a hard-mounted filesystem.
This option is useful
if the server or the connection to the server is known to be slow or
unreliable. It is recommended to always have the intr
option on. A keyboard interrupt is configured by entering
stty intr key
where key is the keyboard key you wish to use to
issue an interrupt.
specifies that the user cannot terminate an NFS operation from the
keyboard. This should only be used if the server and link to the
server are known to be reliable. Non-interruptible is the default.
caches the file attributes. This eliminates redundant
requests to the server for file information/attributes. This
option is the default.
does not cache attributes. Use this option when close synchronization
with the server is required. Note that using this option
will drastically impair
performance on the filesystem being mounted.
Read/Write Buffer Size (bytes)
specifies client read and write buffer sizes in bytes (the default size
is 8192 bytes). This should be lowered if you have a slow Ethernet card.
Timeout period for each operation
sets the initial NFS timeout for
each RPC operation
to n seconds. The default is 300 seconds.
Number of retries before reporting error
specifies (for soft mounts only) the number of NFS retransmissions
the client will make before reporting an error.
The default is 5.
Alternate IP Port Number
set the server IP port number
(the default port number is 2049).
cdfs advanced mount options
Understanding intent logging
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004