Ultrium 215 compression

[Giuseppe CARMINATI]

We have an HP Surestore Ultrium 215, Tape cartridge C791A 200GB, Windows nt 4.0 sp 6.0, Backup Exec v.8.0 rev. 3314.
Compression mode (Hardware or software) don't work, I can backup max. 84GB in one tape. Have you a solution
Thank's
Beppe

[Steve W]

The Ultrium 215 compression is always on, unless the host or bu software explicitly turns it off. Try running the HP Library & Tape Tools compression test and check for a compression ratio of 2:1 or higher. If you can, then it's not the drive. Look at how fast you are sending data to the drive, or try new tapes...

[Marino Meloni_1]

the problem may be due to poor performance, I the ultrium is not working in streaming mode, you can waste space on the tape.
you can run PAT (performance assessment tools http://h20000.www2.hp.com/bizsupport/TechSupport/DriverDownload.jsp?prodNum=C7200RA&prodName=hp+surestore+tape+library+model+2%2F20&locale=en_US&taskId=8418&taskName=download+drivers+%26+software&prodTypeId=12169&prodSeriesId=34115&prodSeriesName=hp+surestore+tape+library+model+2%2F20#Microsoft Windows NT 4.0 ) that will test your system performances

here is also a good doc for compression issue http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=lpg50244&locale=en_US&docId=99541

also remember to disable software compression using the hardware one

bye

marino