> Another interesting cause for problems is duff powersupplies. As the
> proverb goes "every machine is as good as it's PSU". E.g. I just struggeled
> with a DLT tape unit that inexplicable reset itself. After examining the
> 5Volts rail with a scope I found glitches on it whenever the drive did a
> bit of rewinding (dropping out of streaming mode). Had me stumped for a
> while.
>
That's pretty rare these days. It used to happen all the time when
switching power supplies first appeared (motorboating is what we called
it), but even recently I had a marginal supply that supplied 4.4VDC-
*just* enough to function *most* of the time.
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