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File Formats vfstab(4)
NAME
vfstab - table of file system defaults
DESCRIPTION
The file /etc/vfstab describes defaults for each file sys-
tem. The information is stored in a table with the following
column headings:
device device mount FS fsck mount mount
to mount to fsck point type pass at boot options
The fields in the table are space-separated and show the
resource name (device to mount), the raw device to fsck
(device to fsck), the default mount directory (mount point),
the name of the file system type (FS type), the number used
by fsck to decide whether to check the file system automati-
cally (fsck pass), whether the file system should be mounted
automatically by mountall (mount at boot), and the file sys-
tem mount options (mount options). (See respective mount
file system man page below in SEE ALSO for mount options.) A
'-' is used to indicate no entry in a field. This may be
used when a field does not apply to the resource being
mounted.
The getvfsent(3C) family of routines is used to read and
write to /etc/vfstab.
/etc/vfstab can be used to specify swap areas. An entry so
specified, (which can be a file or a device), will automati-
cally be added as a swap area by the /sbin/swapadd script
when the system boots. To specify a swap area, the device-
to-mount field contains the name of the swap file or device,
the FS-type is "swap", mount-at-boot is "no" and all other
fields have no entry.
EXAMPLES
The following are vfstab entries for various file system
types supported in the Solaris operating environment.
Example 1: NFS and UFS Mounts
The following entry invokes NFS to automatically mount the
directory /usr/local of the server example1 on the client's
/usr/local directory with read-only permission:
example1:/usr/local - /usr/local nfs - yes ro
The following example assumes a small departmental mail
setup, in which clients mount /var/mail from a server
mailsvr. The following entry would be listed in each
client's vfstab:
SunOS 5.10 Last change: 21 Jun 2001 1
File Formats vfstab(4)
mailsvr:/var/mail - /var/mail nfs - yes intr,bg
The following is an example for a UFS file system in which
logging is enabled:
/dev/dsk/c2t10d0s0 /dev/rdsk/c2t10d0s0 /export/local ufs 3 yes logging
See mount_nfs(1M) for a description of NFS mount options and
mount_ufs(1M) for a description of UFS options.
Example 2: pcfs Mounts
The following example mounts a pcfs file system on a fixed
hard disk on an x86 machine:
/dev/dsk/c1t2d0p0:c - /win98 pcfs - yes -
The example below mounts a Jaz drive on a SPARC machine.
Normally, the volume management daemon (see vold(1M)) han-
dles mounting of removable media, obviating a vfstab entry.
If you choose to specify a device that supports removable
media in vfstab, be sure to set the mount-at-boot field to
no, as below. Such an entry presumes you are not running
vold.
/dev/dsk/c1t2d0s2:c - /jaz pcfs - no -
For removable media on a SPARC machine, the convention for
the slice portion of the disk identifier is to specify s2,
which stands for the entire medium.
For pcfs file systems on x86 machines, note that the disk
identifier uses a p (p0) and a logical drive (c, in the
/win98 example above) for a pcfs logical drive. See
mount_pcfs(1M) for syntax for pcfs logical drives and for
pcfs-specific mount options.
Example 3: CacheFS Mount
Below is an example for a CacheFS file system. Because of
the length of this entry and the fact that vfstab entries
cannot be continued to a second line, the vfstab fields are
presented here in a vertical format. In re-creating such an
entry in your own vfstab, you would enter values as you
would for any vfstab entry, on a single line.
device to mount: svr1:/export/abc
device to fsck: /usr/abc
mount point: /opt/cache
FS type: cachefs
fsck pass: 7
mount at boot: yes
SunOS 5.10 Last change: 21 Jun 2001 2
File Formats vfstab(4)
mount options:
local-access,bg,nosuid,demandconst,backfstype=nfs,cachedir=/opt/cache
See mount_cachefs(1M) for CacheFS-specific mount options.
Example 4: Loopback File System Mount
The following is an example of mounting a loopback (lofs)
file system:
/export/test - /opt/test lofs - yes -
See lofs(7FS) for an overview of the loopback file system.
SEE ALSO
fsck(1M), mount(1M), mount_cachefs(1M), mount_hsfs(1M),
mount_nfs(1M), mount_tmpfs(1M), mount_ufs(1M), swap(1M),
getvfsent(3C)
System Administration Guide: Basic Administration
SunOS 5.10 Last change: 21 Jun 2001 3
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 11:27:34 GMT 2007
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