Jeff

1) I am not sure  that tweaking st.conf parameters will improve the
compression ratio

2) If your Solaris box updated with sun recommended patches bundle,
updating of st.conf is not required. st. (SDLT tape support is included
in st driver binary.)
To be sure about it just run strings command on st binary:
root> strings /kernel/drv/st |grep -i sdlt
QUANTUM SDLT320
3) It will be good idea to ask STK/QUANTUM about the right firmware
version, update Solaris with last kernel and scsi patches and so on
4) Regarding the drive performance, after applying the recommendations
in 3) you need to tweak Netbackup buffers in order to get optimal
throughput.

HTH,
Daniel.


-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Bittinger
Jeff
Sent: Tuesday, March 02, 2004 7:33 PM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] st.conf


Help anyone,
             Can anybody tell what lines I need to add to my
/kernel/drv/st.conf file to get the best compression and performance. I
am currently running Netbackup Data Center  on Solaris 9 with a
StorageTek L80 library and Quantum SDLT320 tape drives.
         Also the tape drives all have the cbn flags (ex. /dev/rmt/0cbn)
Is this correct for hardware compression? I get zero compression when
software compress is off. And with Software comp. on I get only around
34% compression. This on a directory with only text files. Called
Veritas and they where no help at all.

Any help would be great!!!

Thanks in advance,

Jeff


_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

**************************************************************************************************
The contents of this email and any attachments are confidential.
It is intended for the named recipient(s) only.
If you have received this email in error please notify the system manager or  
the 
sender immediately and do not disclose the contents to any one or make copies.

MBI - System Team
**************************************************************************************************