vfstab(4) File Formats vfstab(4)NAMEvfstab - table of file system defaults
DESCRIPTION
The file /etc/vfstab describes defaults for each file system. 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 sys‐
tem automatically (fsck pass), whether the file system should be
mounted automatically by mountall (mount at boot), and the file system
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 automatically 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.
iSCSI LUN can only be mounted after the iSCSI initiator SMF service,
svc:/network/iscsi/initiator, is started. Set the mount at boot entries
for iSCSI LUN in /etc/vfstab to iscsi instead of yes. This enables the
iSCSI initiator SMF service to attempt to mount iSCSI LUN later.
EXAMPLES
The following are vfstab entries for various file system types sup‐
ported 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:
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)) handles 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
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 ALSOfsck(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 4 Jun 2010 vfstab(4)
