if it is any consolation we have the identical library/drives, and
network and are running nw 7.1 on a w2k server and are seeing similar
performance. i went through a near six-month case w/legato w/no
resolution on this issue. it got down to the point legato blamed adic
(and everything else), and adic was able to write close to the
theoretical limit on these drives (approx 20 MB/sec i believe) with a
test write.

i do not disagree with your feeling it is network, but i will not bet
the bank on it...


michael brooks ............... michaelb AT sequoiains DOT com
Network Administrator ........ 831.657.4539 phone
Sequoia Insurance Company .... 831.657.4512 fax


-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]
On Behalf Of Somen Chanda
Sent: Monday, September 27, 2004 10:41 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] Drive write performance

We have a 100MB/sec network which is used for data and backup. Our
backup server is a Sun 280R running Solaris8 and has 2GB RAM and a
similar config storage node. We have LTO1 drives in a ADIC Scalar100
library, We currently do not see backups moving more than 11MB/sec per
drive.

Is there any parameter which can be tweaked to get a better write
performance?

I am starting to believe that it is our network which becoming a
bottleneck.

I even tried backup to disk and I do not get any better performance
writing the backup to disk.

Any ideas/suggestions??

Thanks

Somen

--
Note: To sign off this list, send a "signoff networker" command via
email to listserv AT listmail.temple DOT edu or visit the list's Web site at
http://listmail.temple.edu/archives/networker.html where you can also
view and post messages to the list.
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=

--
Note: To sign off this list, send a "signoff networker" command via email
to listserv AT listmail.temple DOT edu or visit the list's Web site at
http://listmail.temple.edu/archives/networker.html where you can
also view and post messages to the list.
=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=