What is the throughput you are achieving?  Mt experience is that it is
very difficult to keep an LTO drive streaming.  Drive compression has a
large effect. With drive compression, you will need a total system which
can maintain 15 MB/sec X Compression Ratio.  In addition, the TSM overhead
per file can slow down even the fastest systems.  Look in the archive for
some test numbers I posted for a system very much like yours.  I posted it
about a month ago.

Orville L. Lantto
Datatrend Technologies, Inc.
121 Cheshire Lane #700
Minnetonka, MN 55305





Jorge Rodriguez <jrodri_duran AT HOTMAIL DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
11/08/01 02:19 PM
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        LTO 3584 in a SAN not use several drives in a session


Hi all...

I have the following, AIX 4.3.3 TSM Server 4.2.0 TSM Storage Agent 4.2.0
TSM Client 4.2.0 TDP for R3 3.2.0.6, LTO 3584 with 4 drives. The SAN
fabric is with McData Directors ED-5000 and the LTO is connected to a
McData ES-1000, and this conected to the director.

I can configure without problems the library and drives in the AIX and
TSM, but I can4t use several drives in a backup session. I set
Resourceutilization in 8, MaxNumMntPoint in 2 to use two drives, the
StorageAgent opens several sessions but only mount a drive.

Thanks in Advance

Jorge Rodrmguez
Caracas - Venezuela

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