System Administration Guide, Volume 1

How to Determine a File System's Type

This procedure works whether the file system is mounted or not.

Determine a file system's type by using the grep command.

$ grep mount-point fs-table


Specifies the mount point name of the file system for which you want to know the type. For example, the /var directory.


Specifies the absolute path to the file system table in which to search for the file system's type. If the file system is mounted, fs-table should be /etc/mnttab. If it isn't mounted, fs-table should be /etc/vfstab.

Information for the mount point is displayed.

Note -

If you have the raw device name of a disk slice, you can use the fstyp(1M) command to determine a file system's type (if the disk slice contains a file system).

Example--Determining a File System's Type

The following example uses the /etc/vfstab to determine the type of the /export file system.

$ grep /export /etc/vfstab
/dev/dsk/c0t3d0s6   /dev/rdsk/c0t3d0s6  /export ufs   2       yes    -

The following example uses the /etc/mnttab file to determine the file system type of the currently mounted diskette (mounted by volume management).

$ grep /floppy /etc/mnttab
/vol/dev/diskette0/unnamed_floppy   /floppy/unnamed_floppy  pcfs rw,nohidden,
nofoldcase,dev=16c0009      89103376