Marcos,

As far as networking is concerned, I abuse my older machines all of 
time.  I don't think you have a networking problem; I think it is a 
hardware problem, or very bad device driver settings.

"General failure reading drive C" is a bad sign.  I would make a new 
backup of that server hard drive (do not overwrite an existing backup in 
case the backup fails mid-way).  After getting a good backup, I would 
try to dump the SMART data on it and run some benchmarks or 
diagnostics.  If the hard drive is having a hard time reading data then 
all sorts of secondary errors can happen as a result.

Next is to inventory and review all of the hardware in the computer and 
make sure none of it is in conflict.  Have a sound card?  Pull it out 
...  you don't need it in a server.  Check the BIOS settings.  That 
machine has to be absolutely stable before you start adding clients to it.

What OS are you running?  If you are running some early form of Windows, 
then ditch it.  You can do better with a current (or recent, but not 
new) Linux running with a text console.  My old Linux boxes share using 
SAMBA just fine, and Linux is robust and easier to diagnose when 
hardware or software is misbehaving.

Next, you need to start testing the clients and the servers together.  
It's hard to imagine that the clients are putting such a huge load on 
the server that the server is glitching - file sharing is not CPU 
intensive.  But you want to do this in a test environment, not with the 
real database that everybody is using!  Setup some batch files to copy 
and compare files to ensure that the files are not getting corrupted and 
to generate some load against the server.

Remember, a low end Pentium machine can easily saturate a 10Mb/sec 
Ethernet by itself.  That's almost 1MB a second of file transfer 
capability if you are using TCP/IP.  If you have Pentium gear you 
probably have 100Mb/sec hardware, so that number is closer to 10 times 
more.  Are your clients accessing this database really generating 1MB or 
more of data per second?

I'd be interested to hear your results.


Mike




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