backup to 150-MB cartridge tape

[Gary Cattelino]

> This is in reponse to Danielle's question about backing up to 150-MB tapes
> instead of the 60-MB ones.  These are the parameters I was told to use by
> our Sun FE:

> /usr/etc/dump [0-9]uctsdf 18 620 1250 /dev/nrst0 /dev/rsd6[a-h]

On page 74 of the Sparcstation 1 Sun System and Network Manager's Guide
(the little books you get when you buy a Sparc 1) it says to use:

/usr/etc/dump 0cusdtf 590 1200 18 /dev/nrst0 filesystem

In the discussion they say to use 590 to handle media errors (600 feet
minus 10 feet to handle media flaws).  Well, I just looked at a DC6150 and
it says 620 feet.  Maybe the proper size to use for these tapes is 610
feet?  It also says the density is 1200, not 1250 from the previous
posting.  Which is correct?  I've been using 1200 with no problems.  Maybe
a density of 1250 will allow me to store more on one tape?

Anyone know the answers to these questions?

    
Gary A. Cattelino                  Unocal Science & Technology Division
Phone: (714) 528-7201 x2715        376 S. Valencia Avenue
UUCP: uunet!zardoz!cerveza!gary    Brea, CA 92621
      sun!sunkist!cerveza!gary     INTERNET: gary at unocal.COM