Now that I have a new tape drive (Thanks to all who helped!) I have 
started experimenting with this W2K Server.

Optimal settings depend on your specific configuration.  You will need to 
experiment.

We have a Compaq DL580 with an attached Compaq SDLT drive.  As well as
being the sole master/media server, all data to be backed up, files and
Exchange stores, are located on this server.  I have not modified 
NET_BUFFER_SZ at all, since this is all direct attached.  (Would this 
parameter make a differnce in my case?)

Exchange stores are about 2.5 GB
The four directories hold about 92,500 files in about 45 GB.


    TUNING IMPACT ON THROUGHPUT

   SIZE   NUMBER   Files  Exchange
  Default Default   3911    3985
   65536  Default   3911    4034
  131072 Default  FAILED - bptm log shows max for this drive is 64 kB
   65536    32      5973   15915
   65536    64      7994   15303


Tonight we shall see what happens with 128 buffers.  I cannot express how
exited I was to see the 2.5 GB Exchange store backed up in under three
minutes - much less then 30 minutes with the old DLT setup (with default
parameters).  Reducing the backup window from 9 hours to just over 2 has 
more than justified the cost of this new hardware, and given me much 
geeky pleasure.  :)

HTH,
Ron Lyman
Network Support
Moen Incorporated
(905) 829-3400 x 253

On Mon, 8 Jul 2002, vidit kohli wrote:

> hello
> 
> Could anyone please send me the performance settings for Win Nt/2000 servers
> 
> Size_data_buffer
> Number_data_buffer
> Net_buffer_sz
> 
> thanks
> 
> vidit