Follow these steps:
1) Log onto the system as "root".
2) Enter the line: mount
A list of the currently mounted file systems will be displayed.
Example output:
/dev/dsk/c0d0s0 on / type 5.2 (rw,noquota)
/dev/dsk/c0d5s0 on /users type 5.2 (rw)
macaux:/s1 on /earlw1 type nfs (rw,soft)
If the file system you trying to mount is listed, then it is already
mounted. You may unmount the file system and mount it again to be sure.
1) Enter the command
umount
followed by a space and the absolute pathname of the file system
directory. For example, the command "umount /users" unmounts the /user
partition.
2) Enter the command
mount
followed by a space and the device name of the file system to be mounted,
a space, and the absolute pathname of the directory on which the file
system will be mounted. For example, the command
mount /dev/dsk/c5d0s0 /users
mounts the file system associated with the device "/dev/dsk/c5d0s0" on
the directory /users.