If you've got the budget or are dealing with small enough physical
storage needs, by all means use RAID 10. OTOH, if you are dealing
with large enterprise class apps like Sarbanes Oxley compliance,
medical and/or insurance, etc, etc, the storage needs can get so large
that RAID 10 for everything or even most things is not possible. Even
if economically feasible.
RAID levels are like any other tool. Each is useful in the proper
circumstances.
There is also RAID 50 which is quite nice.
Joshua D. Drake
Happy holidays,
Ron Peacetree
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