Level 0 Archive Sloooooooow

I'm looking for ideas on where to look for the source of my performance problem with tbtape. I have two HP9000/700's with OnLine 5.03 UC1 and am running a level 0 archive on both of them today. The slower model 750 with 3 Gbytes of data and a heavy system load finished after 4 hrs, 50 mins. The "faster" 735 with 2 Gbytes of data and a lighter system load is still going after 8+ hours and according to the output of tbtape is only "12 percent done." The two systems are pretty equivalent with HP Raids (set for "0,1"), and DAT tape drives. Informix tape block size from tbstat -c on both is: TAPEBLK 64 # Archive tape block size (Kbytes) I'm running GLANCE which shows tbtape CPU util at an average of 1% with about 10 - 15 disc I/O's per second. The CPU is usually only 30% busy. Surely, it could plod along a little faster than this. Any ideas? -Ken Miles Vancouver Division kenm@vcd.hp.com