NFS filesystem advanced mount options
In the Filesystem Manager, select Add Mount Configuration or
Modify Mount Configuration from the Filesystem menu,
then select Remote. After you have selected a remote
filesystem, select Advanced Options.
When mounting a remote filesystem, an NFS client can specify
options that characterize the individual mount request.
The following options can be set from the Filesystem Manager:
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
NFS mount type
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.
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.
SUID and SGID file permissions
controls SUID and SGID execution permissions
for binaries in exported filesystems; for more information, see
``SUID/SGID bits and security''
``SUID, SGID, and sticky bit clearing on writes''.
accepts imported SUID and SGID execution
permissions as they are set in the remote filesystem. This
is the default.
ignores imported SUID and SGID execution
permissions. Use this option if you are concerned
with filesystem security.
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 (seconds)
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.
The following option can be set when invoking NFS
sets the transport protocol for this filesystem
specifies the Transmission Control Protocol (TCP); this is
recommended if reliable connections are required
specifies the User Datagram Protocol (UDP); this is the default
Mounting and unmounting filesystems
Enabling users to mount filesystems
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003