Where's /etc/rmt (remote tape server)?

[Kevin Crowston]

I have two machines, one with an Apple cartridge tape drive.  
I decided to backup up the disks.  Backing up the one with
the tape drive was easy although very slow.  To backup the
other, I thought I'd have to move the tape drive, until I
read in the manuals about rdump.  rdump claims to be able to
backup to a tape drive on another machine by creating a 
server process.  However, when I run it, I get an error message
saying that it can't find /etc/rmt.  Sure enough, there are
all kinds of man files, include files, etc. for rmt, but no
/etc/rmt (which I assume is the server).  So, where's /etc/rmt?

Kevin Crowston