Solved

SCO system problems

Posted on 2000-04-21
7
322 Views
Last Modified: 2013-12-05
Hi...
Firstly, I don't know much about Unix so please bear with me.
I have a server system running SCO, not sure what ver. it is running Rinax software. The computer is a P-166. It has dumb terminals connected to it throughout a supply store. As of late, for some reason, when the fax machine rang the computer seemed to lose power. It would have to be shut off then turned on again.
The fax machine was moved into another room and that seemed to help. The other day though it rebooted itself for some reason.
Now the computer has a modem in it, but it and the fax machine are on two seperate phone lines. The computer has a UPS on it. Can't think of any other details that may help.
0
Comment
Question by:chess
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 40

Expert Comment

by:jlevie
ID: 2739865
When you say that the system "seemed" to lose power with the fax machine in the same room, did the UPS indicate that it was transitioning to battery? And is the UPS's battery good? It ought to be able to run the system without line power for several minutes. It could be that the outlet circuit that the computer is on is pretty heavily loaded and when the fax machine "woke up" on an incoming call the total load on the circuit pulled the line voltage below what the UPS considers nominal.

If this turns out to be the problem (and it can be checked with a good voltmeter), simply moving the fax to a different room may or may not result in the fax system being on a different outlet circuit. That would depend on how the building is wired.

There are other things that could also happen to the line voltage that could affect the UPS, but you'd need a good line voltage monitor with transient detection to see them. If the fax is producing that kind of noise, using outlet circuits that are on different legs of the transformer that feeds the building might help. It would also be good to check to see that the outlet the computer is using is wired correctly (hot & neutral to the correct blades and a good ground). Checking those and finding two circuits on different transformer legs would best be done by an electrician.
0
 

Author Comment

by:chess
ID: 2739893
Yikes.... I'd better check the UPS battery, then call an electrician.
Do you know why it would all of a sudden just start to happpen? The fax and computer had co-exsisted together for quite some time. Then when the fax is moved it happens aagain.
0
 
LVL 40

Expert Comment

by:jlevie
ID: 2740060
If the UPS is of appreciable age, it could be that the battery has finally reached the point that it simply doesn't hold enough charge to ride out a short outage. The higher quality UPS's (read more expensive) continuously monitor their battery and usually start fussing before the situation is critical. So it may be that there's been a problem all along and you got away with it until the battery degraded. It also could be that some other load is now connected to that circuit that wan't present before, or something could have been rewired, or a ground connection could have losened.

An easy check that you ought to do before calling an electrician and that won't harm the system is to power up the box and get it into the bios setup, which will keep it from booting (with the possibility of damage to the OS from a power outage). Then simply unplug the UPS from the wall socket and see if the UPS will keep power on the system for at least a few minutes. I try to remember to check all of my UPS's this way at least a couple of times a year.
0
[Live Webinar] The Cloud Skills Gap

As Cloud technologies come of age, business leaders grapple with the impact it has on their team's skills and the gap associated with the use of a cloud platform.

Join experts from 451 Research and Concerto Cloud Services on July 27th where we will examine fact and fiction.

 

Author Comment

by:chess
ID: 2768070
I unplugged the UPS and everything went dead right away. It did beep a little bit and a light did stay on.
I guess this would pretty much indicate the battery is dead?
Also I should add, besides the SCO box being plugged into the UPS (no monitor), there are also two dot matrix printers plugged into it to.
would that be overloading it?
0
 
LVL 40

Expert Comment

by:jlevie
ID: 2768973
More than likely that's a dead battery. I doubt that small dot matrix printers would be much of a electrical load.
You could make sure that they aren't the problem as far as the UPS is concerned by simply turning them off for a minute or two while testing the UPS.
 
0
 

Author Comment

by:chess
ID: 2769165
Ok, I guess I will go ahead and get a new battery.

Thank You for your help!
0
 
LVL 40

Accepted Solution

by:
jlevie earned 200 total points
ID: 2769232
If we are done with this I wouldn't mind having points, please.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hello fellow BSD lovers, I've created a patch process for patching openjdk6 for BSD (FreeBSD specifically), although I tried to keep all BSD versions in mind when creating my patch. Welcome to OpenJDK6 on BSD First let me start with a little …
A metadevice consists of one or more devices (slices). It can be expanded by adding slices. Then, it can be grown to fill a larger space while the file system is in use. However, not all UNIX file systems (UFS) can be expanded this way. The conca…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question