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vfstab(4)

vfstab(4)                        File Formats                        vfstab(4)



NAME
       vfstab - 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 can 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), automatically is added as a swap
       area by the /usr/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.  The  presence in /etc/vfstab of the encrypted
       option, specified for swap device that is a ZFS volume or a raw device,
       enables  encryption  on  that  device.  For a ZFS volume, encryption is
       enabled by the ZFS encryption property (see zfs(1M)); for a raw device,
       encryption is enabled by means of lofi(7D).


       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 software handles mounting of removable media, obviat‐
       ing a vfstab entry. Specifying a device that supports  removable  media
       in  vfstab with set the mount-at-boot field to no (as shown below) dis‐
       ables the automatic handling of that device. Such an entry presumes you
       are not running volume management software.


         /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 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_hsfs(1M),  mount_nfs(1M),  mount_tmpfs(1M),
       mount_ufs(1M), swap(1M), zfs(1M), getvfsent(3C), lofi(7D)


       Introduction to Oracle Solaris 11.3                 Administration



SunOS 5.11                        8 Jun 2011                         vfstab(4)
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