backups - dump

I have just received an hp dds3 tape drive that uses 16G - 24G tapes - when I use the following command on a filesystem that is only 1.2G I have to change the tapes quite often, this is the erason I got the dds3 tape drive, so that I do not have to change the tapes. the command that I use is the following:
/sbin/dump 0uf /filesystem /dev/st0 - I think that I am just missing a parameter so that i do not have to change the tape.  Can some one please help me.
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bryanjonesAsked:
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JYoungmanConnect With a Mentor Commented:
This is a PAQ.  You use the s and d options to
dump to tell it how long the tape is.  I use
46940 and 61000 respectively for a 4Gb tape, you
can just scale up one of these numbers to get 16Gb, I think,
unless you run into some kind of 32-bit calculation overflow.


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