> > I need the information just to understand each "mt" commands exactly.
> > I tried to rewind the tape one file backwards and read it again with
> > "bsf", but I cound not read that until I tried the second time to read.
> `mt bsf' positions the head *before* the filemark, i.e. at the end of
> the previous file. Use `mt bsfm' instead, or skip over the filemark
> with `mt fsf' after rewinding. BTW to re-read the file you just wrote,
> you usually have to run `mt bsfm 2'.
I think this may be a OS specific answer. My implimentation of mt (SunOS
4.1.x does not have a bsfm option. Instead it has nbsf and asf. From the
nbsf Back space count files. The tape is positioned
on the first block of the file. This is eqivalent
to count+1 bsf's followed by one fsf.
asf Absolute space to count file number. This is
equivalent to a rewind followed by a fsf count.
Check out the man pages on your system to see which works for you.
David R. Steiner ISPA
Research Assoc./Sys Admin University of Vechta
Remote Sensing/GIS Vechta, Germany
*All decisions are based on insufficient evidence.-Nickel Hunsenmeir*