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System in Shock?

By randerson7 ·
We are a rural school district. A computer lab has been experiencing random machine problems that are unexplainable. The machines will hang up constantly or the screens will go black for no reason. At random, users will not be able to log into the Novell system. Machines have been rebuilt and still exhibit the same problems. I have placed a known good machine from another building into the network and found that it too experiences the same problems. Our network support people are at a loss.
There is a recognized problem with "spiking" in the district. Has anyone had similar problems and found resolutions?

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by jimmy In reply to System in Shock?

First of all i need more information.

E.g
1 - Are all Pc's you are connecting to LAB network taken from an Image i.e. Norton Ghost.
2- Do they all have Adobe Software
3- Do they all have the same Graphics card
4 - Do they all have the same monitors
5- What operating Systems are involved

Please respond
HTH jamie

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by TheChas In reply to System in Shock?

Since it is known that you have a power stability issue, that is where I would start.

Have an electrician verify the integrity of the earth ground for the power in the computer lab, and the server.

Next, forget about surge strips and install a power conditioner.
Sola is one manufacture that has been in the power conditioning business for years.

You can either install 1 or 2 large units, or small units at each work station.

If you still have problems, I would replace your router / switch and perhaps the NICs in the work stations.

Chas

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by CLIFFL In reply to System in Shock?

Ring up your local electricity board tell them the problem and ask them to put a meter in your lab, this will take a record of the power fluctuation over a given period. There is no point doing anything else until you have eradicated this point.
I remember doing this for a customer in Seymouth many, many moons ago, you should have seen the trace. !!! Then when it happens again note the time and see if it correlates with the graph. !!

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by Chris910 In reply to System in Shock?

First, I agree with the others that you need to deal with the power problems. There are federal regulations that dictate to power companys a level of service that they must provide to their customers, even rural customers. Depending on your power situation it might be in the local utilities best intrest to provide the power conditioning as the equipment can be costly.

Second, If you are using a copper medium such as thinnet or CAT5 and your network spans multipul buildings you should investigate the earth grounds for the electricity at both buildings where the network cables terminate. There are situations where small amounts of current can flow from building to building through your network cable causing signal degradation particularly with thinnet. (this phenomana is called Ground loop) In our early days when we where using thinnet for all of our connections we woound up hiring an electrical contractor to "Bond" the 7 buildings in our office complex to resolve our problems. Today the cost of installing fiber would be much cheaper and eliminate the need for bonding.

lastly if you try to use UPS's to resolve your power issues dont forget to use one on your hub/switch as well.

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by randerson7 In reply to System in Shock?

All images are Ghosted from a single image and all machines are identical with same monitors.

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by randerson7 In reply to System in Shock?

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