dump under Ultrix 4.1 (DS3100/TK50)

[Gordon Jacobs]

I just upgraded to Ultrix 4.1 on a DECstation 3100 and when I 
went to perform a tape backup to TK50, I typed:

	% dump 0u /usr

as usual.  The dump program announced that it would write 10.3
tapes of the 300Mb partition!  This was based on 1600bpi density
and when I read the man page, it said that the default was 1600.
I quit and re-ran the dump using the "d" option to specify 6250bpi
and the results were more reasonable.  I thought the TK50 had a
fixed density.  The default under Ultrix 3.1 was such that no 
density needed to be specified.  Is the dump message just wrong?
Will it always use the correct density, or what should be specified?

Thanks,
Gordie Jacobs