Hi, 

First of all, I remember some issues with Adaptec cards, LTO drives and
performance problems. If I recall correctly you have the install the
correct driver version of some Adaptec cards from a fresh installation
of Win2K to not get hit by that problem. 

Then, "I can't get", what process are you running to check the
performance of the drives. You have your DB, logs and diskpool volumes
all on RAID5 sets. If you are running test, do you have some performance
counters running on this like memory / cpu / disk IO? 

Some test to see if the TSM server is the bottle neck could be things
like directly writing a large file to tape (from outside TSM).

Last, but not least. Why version 4.3?

Regards,

Karel
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Coats, Jack
Sent: woensdag 26 januari 2005 17:16
To: ADSM-L AT VM.MARIST DOT EDU
Subject: How to get a tape drive to stream?

But does someone have a pointer to some 'tips & tricks' or FAQ to help
me get these LTO tape drives streaming with TSM on Windows 2000? 
  
The drives seem to be doing about 3MB/sec per drive, no matter what is
going on in the server.  This is about the right speed for stop/start
programmed I/O processing.

 

My config is TSM 4.3 on Windows 2K server (2 1.2G Xenon, 1G RAM)

My SCSI attached LTO-1 drives are on Adaptec controllers (IBM branded),
with two tape drives per controller.  I have 3 identical SCSI
controllers with two drives each (one also has my 3583 library on it).

 

Disks (6 72G 10K drives, in two partitions) are attached to one RAID
card, and are RAID 5.

 

I can't get just running a single tape drive streaming, with nothing
going on in my system (db backup only,  no backups, no reclamation, no
expiration, etc)

 

Any advice/suggestions are appreciated. ...

 

... Desperate in Houston ... JC