James Knott wrote:
Hans Witvliet wrote:
The only computer I have with RAID also has error correcting memory, as
many servers use. Also, back in the days when I was a computer tech,
servicing mini-computers, hard drive failures were far more frequent
than memory.
mem, mobo's and cpu's are most likely to suffer from ESD (and heath)
The effects will show up sometimes at late as in several years.
I found out that most shops haven;t got a faintest clue what ESD is.
Drives will suffer not only from ESD and heath but also from wear,
G-forces.
So if you obtain your system from proper qualified supplier, that takes
precautions and test the componentes before using them, or take those
precautions yourself. chances that you suffer from mem problems is often
smaller than HDD problems.
Note, I assume you treat your components well, playing with
overclocking, wrong ras/cas timing, overheated north-bridge can also
cause "funny effects".
Output of the powersupply has to meet more stricter demands, as mem and
cpu are using still lower voltages these days. A spike of 0.1 volt did
do anything some years ago, but can corrupt the content of your DDR
today.
hw
Back in the days when I supported mini-computers, everything was TTL
logic, with ECL used in some critical areas. The CPU was two 15 inch
square boards! A 200 MB disk pack drive was the size of a washing
machine and required 3 phase power. Some of the systems I worked on
were water cooled. Back in those days, I worked down to the microcode
level, that is the instruction set within the CPU, that enabled it to
run the instruction set the applications would use.
And some CPUs from IBM even had the capability of CHANGING
instruction sets between processes. Like an IBM 370 could
simulate several single-user IBM 360's and single-user IBM
704's by just switching microcode with each context switch.
IBM's software from the era is nothing to rave about, but
their hardware has always been top notch.
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