System Locks up overnight

[tylerr]

I have upgraded the drivers and the firmware. Didnt help. Now when I get the units back i am going to start swapping components between the mached pair of machines. The server crashed after several hours of inactivity or at least activity with no DMX applied. Its an odd problem.

When did you work at VL?

[samsc]

classic sympton of intermittent hardware problem....

V*L -1988-91 i used to fix artisan consoles

[gagaga]

Similar problem or not, I don't know actually. In my case, I took off the memories, then slotted in those.
Apple Support mentioned that is memory issue in this article.

http://docs.info.apple.com/article.html?artnum=86776

This is for Xserve,but our G5's power light flashed three times.
Now the G5 looks fine.

[samsc]

apple actually ships a hardware test cd with the computers, that loads before the OS loads.

it is supposed to do memory tests and the like.

the intermittent problems we are seeing here, are not likely to be memory related.

if the memory is incorrectly installed, it just wont work at all.

[tylerr]

I have done all the Apple tests. A OK.

Tyler

[samsc]

yes.

apple hardware tests arent good for intermittent problems.
they test things once, then finish.


i wrote test software for the artisan lighting consoles, that tested the buttons and lights, it had to run the whole time for hours, then you used to hit things, and see intermittent faults.

[tylerr]

I have an update to this ongoing problem.

I have now done the following.
Formatted Drives and reloaded OS and Library
Replaced SCSI Cable
Replaced SCSI Controller
Flashed all firmware

And oddly enough it still crashes in about 8 hours.
Now here is what i have found.

If I run the system with a Targus USB hub it will crash in 8 hours. New hub or old hub it doesn't matter.

However if I run it without the hub it runs all night long. I am up to 20 hrs.
Has anyone had any USB hub problems?

But in the end the really cool part is that I have 3 other systems running with this same hub and there are no problems on those machines.