HP-UX Reference (11i v2 07/12) - 4 File Formats (vol 8)

f
fstab(4) fstab(4)
Entries marked by the type ignore are ignored by all commands and can be used to
mark unused sections. If type is specified as either
ignore, dump, swap,or
swapfs, the entry is ignored by the
mount and fsck commands (see mount(1M)
and fsck(1M)). fsck also ignores entries with type specified as
cdfs, nfs, memfs,or
lofs.
options A comma-separated list of option keywords, as found in mount(1M) or swapon(1M).
The keywords used depend on the parameter specified in type.
backup frequency Reserved for possible use by future backup utilities.
pass number Used by the
fsck command to determine the order in which file system checks are
done. The root file system should be specified with a pass number of 1, to be checked
first, and other file systems should have larger numbers. (A file system with a pass
number of zero is ignored by the
fsck
command.)
File systems within a drive should be assigned different pass numbers, but file sys-
tems on different drives can be checked on the same pass, to utilize possible parallel-
ism available in the hardware. If pass number is not present,
fsck checks each such
file system sequentially after all eligible file systems with pass numbers have been
checked.
comment An optional field that begins with a
# character and ends with a new-line character.
Space from the pass number to the comment field (if present) or to the new-line is
reserved for future use.
There is no limit to the number of device special file fields in /etc/fstab.
NETWORKING FEATURES
NFS
If the field type is
nfs, a remote NFS file system is implied. For NFS file systems, the device special file
should be the serving machine name followed by ":" followed by the path on the serving machine of the
directory being served. The pass number and backup frequency fields are ignored for NFS entries.
EXAMPLES
Examples of typical
/etc/fstab entries:
Add an HFS file system at /home using default mount options; (backup frequency 0) fsck pass 2:
/dev/dsk/c0t6d0 /home hfs defaults 0 2 # /home disk
Add a swap device to a system managed using LVM, with default options (Note, the directory field
(
/) cannot be empty, even though it is ignored):
/dev/vg01/lv10 / swap defaults 0 0 # swap device
Add a swap device on a system implementing whole-disk layout to use the space after the end of the
file system (options=end):
/dev/dsk/c0t5d0 / swap end 0 0 # swap at end of device
Add file system swap space on the file system containing directory /swap. type is
swapfs; set
options to
min=10, lim=4500, res=100, and pri=0 (see swapon(1M)) for explanation of
options). device field is ignored but must not be empty:
default /swap swapfs min=10,lim=4500,res=100,pri=0 0 0
(Note that both a file system entry and a swap entry are required for devices providing both services.)
Use a device for dump space if the system crashes. directory field is ignored but must not be empty:
/dev/dsk/c0t5d0 / dump defaults 0 0
(Note that both a swap entry and a dump entry are required for devices providing both services.)
Add a MemFS file system at /mnt of size=100MB . The device special file field is ignored but must
not be empty:
memfs /mnt memfs size=100MB 0 0
82 Hewlett-Packard Company − 2 − HP-UX 11i Version 2: December 2007 Update