Re: MacPro - disk (bus?) problems?

On 2007-09-29 19:43:57 -0500, Marc Heusser <marc.heusser@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> said:

I have a MacPro that went back for repair already once - I had crashes,
errors (bad ones) on the hard disks, and I suspected some kind of a bus
error. They did replace one of the hard disks (the original Apple 160GB).

While testing now I still have trouble, not often but worrying. The
computer does not respond anymore, I cannot even get the Force Quit
window via keyboard. The only way is to restart the computer.

When this happens, I get noises as if the disks would repeatedly search
for the same data, as if the data was bad. This goes on for minutes
(until I restart). The disks are one Apple 160GB, and two Seagate 750 GB
in a raid1 (mirror) configuration.

I still do not trust the machine (server, for backups etc) - but I
cannot prove misbehaviour. What can I do? Send it back for repair once
more?

A bus hardware problem is definitely not out of the question. The trick will be to find a way to reproduce the problem. Do all of the tests on the Apple Hardware Test CD that came with the computer pass every time?

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