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Server 2003 Networking issue, LAN connection with other computers sporatic.  Connection seems to be lost then comes back.

Posted on 2004-10-25
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Last Modified: 2010-04-19
"Cannot Copy Barcode: I/O operation has been aborted because of either a thread exit or an application request." - this is an error that I receive when trying to copy a 15 MB file from another computer to the server while at the server.  

Specs:
Brand New Dell server Poweredge 700.
2 nics, onboard intel 1000 and PCI intel 100.
1 nic SMC 100
1 GB Ram
3.0 GB Pentium 4
Dell 25 port switch
Windows 2003 Enterprise Server

I recently installed this server and shortly after the install the users would lose their connection to the server and I could not even open the properties for the local card on the server, it happened to be the onboard 1000 mbps card.  So get them moving I put a SMC that I had on me in it and things seemed to be doing well.

However, they have a Access Database that they all use and one user inparticular - alot.  When this user tries to enter data and get a report back, she fills in the fields and hits submit, but then the database sits there for a minute or so and it should be instant.  THen the field all fill up with null (####) data and she is locked out of it.  So she can close it and open it again but it is still locked under her user and then needs to be repaired, HUGE PAIN!

SO I moved the database to another computer and now when I try to copy it to the server for a backup, sometimes it will timeout with the error listed above.  I tried copying from other users computer some data and the same.  When you watch the netwrk performance monitor in task manager it is only using like 0-1% of the card, and this is at night when no one is on the server.  

I updated  the driver on the intel cards and have not yet had an opportunity to try that onboard card again, this PC is the domain controller. The Internet card seems to have no issue.

Any ideas or help would be greatly appreciated
Thanks
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Question by:loki7474
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Expert Comment

by:JamesDS
ID: 12407885
loki7474
This is probably due to duplex mismatch on your LAN.

I suggest that you set your NICs to force 100Mb Full Duplex and if the switch is manageable, then set the ports the same and retest. If this works you will likely also see a dramatic improvement in LAN Speed.

Cheers

JamesDS
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Author Comment

by:loki7474
ID: 12415047
Do you think I should try that on the intel PRO 1000 card, or the SMC that is currently running?
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Expert Comment

by:JamesDS
ID: 12419274
loki7474
You should try it on whatever NIC is actually connected to the rest of the LAN.

Cheers

JamesDS
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Author Comment

by:loki7474
ID: 12424532
I made those changes and I found that the card actually works best at 10baseT - Full Duplex.  They do have some 10 baset repeaters running, and I am not sure if all the pc's have a 100mbps card.  We just started consulting with them.  Do you think that these variables could be causing some of these issues?
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Accepted Solution

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JamesDS earned 2000 total points
ID: 12430854
loki7474
It certainly sounds like duplex mismatch is your problem then. Unfortunatly in these cases, until you replace your networking hardware you will need to set your hardware speeds to the lowest common denominator - for you 10Mb Full Duplex.

Normally speed/duplex autonegotiation takes place between the LAN and the PC hardware, but this does not always work and means that network speeds have to be set by hand.


Cheers

JamesDS
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