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Best solution

MRFS

Storage Expert

April 10, 2011 5:19:19 PM

> linking drives together does exponentially increase failure rate

No it doesn't: that's a widespread myth that is just not true.

"exponentially"? that would mean that 2 drives are 2^2 or 4 times
more likely to fail.

reductio ad absurdum

RAID 0 actually spreads the workload across all member drives,
so the load on each is reduced, not increased!

if you write a 1 GB file to a RAID 0 partition with 2 x HDDs,
500MB will be written to one member HDD and
the other 500MB will be written to the other member HDD
(assuming 2 member HDDs).

if that RAID 0 partition has 4 member HDDs,
then only 250MB will be written to each member HDD.


p.s. RAID 0 does enhance performance measurably:
here are 4 x Hitachi 2.5" 15,000 rpm SAS HDDs in RAID 0:

http://www.supremelaw.org/systems/hitachi/Hitachi.C15K1...


Here's the same test with only one of those Hitachi SAS HDDs:

http://www.supremelaw.org/systems/hitachi/Hitachi.C15K1...



MRFS