.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $Id: dump.8.in,v 1.28 2001/07/18 12:54:06 stelian Exp $
+.\" $Id: dump.8.in,v 1.29 2001/07/18 13:12:33 stelian Exp $
.\"
.Dd __DATE__
.Dt DUMP 8
to directly position the tape at the file restore is currently working
on. This saves hours when restoring single files from large backups,
saves the tapes and the drive's head.
+.Pp
+It is recommended to set up the st driver to return logical tape
+positions rather than physical before calling dump/restore with
+parameter Q. Since not all tape devices support physical tape
+positions those tape devices return an error during dump/restore when
+the st driver is set to the default physical setting.
+Please see the st man page, option MTSETDRVBUFFER, or the mt man
+page, on how to set the driver to return logical tape positions.
+.Pp
+Before calling restore with parameter Q, always make sure the st
+driver is set to return the same type of tape position used during the
+call to dump. Otherwise restore may be confused.
.It Fl s Ar feet
Attempt to calculate the amount of tape needed at a particular density.
If this amount is exceeded,