HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

m
mount_nfs(1M) mount_nfs(1M)
behavior may be overridden on a per-directory basis by setting the set-GID bit of the
parent directory; in this case, the GID of a newly created file is set to the GID of the
parent directory (see open(2) and mkdir(2)). Files created on file systems that are
mounted with the
grpid option will obey BSD semantics independent of whether
the set-GID bit of the parent directory is set; that is, the GID is unconditionally inher-
ited from that of the parent directory.
rsize=n Set the read buffer size to n bytes. The default value is set by kernel.
wsize=n Set the write buffer size to n bytes. The default value is set by kernel.
timeo=n Set the NFS timeout to n tenths of a second. The default value is set by kernel.
retrans=n Set the number of NFS retransmissions to n. The default value is
5.
soft | hard Return an error if the server does not respond, or continue the retry request until the
server responds. The default value is hard.
intr | nointr
Allow (do not allow) keyboard interrupts to kill a process that is hung while waiting
for a response on a hard-mounted file system. The default is intr.
noac Suppress attribute caching.
nocto Suppress fresh attributes when opening a file.
devs | nodevs
Allow (do not allow) access to local devices. The default is devs.
acdirmax=n Hold cached attributes for no more than n seconds after directory update. The default
value is 60.
acdirmin=n Hold cached attributes for at least n seconds after directory update. The default value
is 30.
acregmax=n Hold cached attributes for no more than n seconds after file modification. The default
value is 60.
acregmin=n Hold cached attributes for at least n seconds after file modification. The default value
is 3.
actimeo=n Set min and max times for regular files and directories to n seconds.
actimeo has
no default; it sets
acregmin, acregmax, acdirmin, and acdirmax to the value
specified.
-O Overlay mount. Allow the file system to be mounted over an existing mount point, making the under-
lying file system inaccessible. If a mount is attempted on a pre-existing mount point without setting
this flag, the mount will fail, producing the error device busy.
Options (umount)
umount recognizes the following options:
-a Attempt to unmount all file systems described in /etc/mnttab . All optional fields
in /etc/mnttab must be included and supported. If -F nfs option is specified, all
NFS file systems in /etc/mnttab are unmounted. File systems are not necessarily
unmounted in the order listed in /etc/mnttab .
-F nfs Specify the NFS file system type (see fstyp(1M)).
-h host Unmount only those file systems listed in /etc/mnttab that are remote-mounted
from host.
-v Verbose mode. Write a message to standard output indicating which file system is
being unmounted.
-V Echo the completed command line, but performs no other action. The command line
is generated by incorporating the user-specified options and other information derived
from /etc/fstab . This option allows the user to verify the command line.
NFS File Systems
Background vs. Foreground
File systems mounted with the bg option indicate that mount is to retry in the background if the
HP-UX 11i Version 1: September 2005 − 2 − Hewlett-Packard Company Section 1M−−519