Maurice Volaski wrote:
>> Perhaps providing the computations rather than the conclusions would
>> be more persuasive  on a technical list ;>
>>     
>
> 2 16-disk SATA arrays in RAID 5
> 2 16-disk SATA arrays in RAID 6
> 1 9-disk SATA array in RAID 5.
>
> 4 drive failures over 5 years. Of course, YMMV, especially if you 
> drive drunk :-)
>   

My mileage does vary!

On a 4 year old 84 disk array (with 12 RAID 5s), I replace one drive 
every couple of weeks (on average).  This array lives in a proper 
machine-room with good power and cooling.  The array stays active, though.

-Luke

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