On Fri, 05 Dec 2003 17:52:19 -0800, Alvin Oga wrote:

> 
> 
> On Fri, 5 Dec 2003, Paul Morgan wrote:
> 
>> > - disks doesn't fail as often as a power supply
>> >    -- hint.. add a nice fan for each disk
>> > 
>> 
>> My experience is the opposite: I have never had a power supply fail, but I
>> have had several disks fail.
> 
> everybody's experiences will be different because:
>       - some people buy good products, some people buy cheap stuff
>       - some people add fans where needed, some people dont
> 
>       - there are always exception to the rule of "good stuff"
>       ( like ibm's major [EMAIL PROTECTED] with their deskstar series of drives,
>       ( caused them to sell their entire disk drive division to hitachi 
>       ( -- just kidding .. but the timing is good for a joke
> 
> given the same system ... things that should die first would be based
> on MTBF ... ( mean time between failure ) all rated at 25C
> 
> Warranty period is probably closely related to MTBF ...
> 
>       - fans ( typically no warranty ... )
> 
>       - power supplies ( some have 100,000 hrs if you believe it )
>               which confirms Pauls experiences w/ power supply vs disks       
> 
>               example: http://www.sparklepower.com/pdf/FSP300-60GRE.pdf
> 
>       - disks ( typically warrantied for 1-3 yrs )
> 
>       - cpu has an mtbf around 30,000 hrs ( about 5 yrs )
>               http://www.Linux-1U.net/CPU/
> 
>               -- notice that your cpu lifespan dies 2x faster for each
>               10C increase in temp
> 
> c ya
> alvin

Since 1982 when I bought Chuck Peddle's Sirius 1 (Victor 9000 in the US),
I have had the following failures:

power supply: 1
hard disk drive: 4
modem: 1 (lightning)

I've been building my own machines for a number of years, and have
generally had more disks than power supplies.

At the moment, for instance, I am running 1 power supply, 1 CPU and 6
disks, so my odds in favor of a disk failure as opposed to a power supply
failure are significantly increased.

Your response was interesting, alvin, thanks.

-- 
....................paul

"The number of UNIX installations has grown to 10, with more expected."
(The UNIX Programmer's Manual, 2nd Edition, June 1972)



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