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What is RaID0, Raid1, Raid5,Raid10

Posted on 2016-09-26
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What is RaID0, Raid1, Raid5,Raid10
and what is the maximum disk we can add into each configuraiton, and what is its redundancy? that menace
how many disks failure it will tolerate?
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Question by:satheesh kumar
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netcmh earned 1000 total points (awarded by participants)
ID: 41816107
I'm assuming you understand what RAID is.

The below is a calculator/helper to get you the answer you need:
http://www.raid-calculator.com/raid-types-reference.aspx
http://www.datarecovery.net/articles/raid-level-comparison.aspx

Which RAID you would use is based on the functionality of the server, the kind of uptime you need and the cost.
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by:PowerEdgeTech
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ID: 41816160
RAID 0 - no fault tolerance, do NOT use
RAID 1 - mirrored data on two drives
RAID 5 - single-disk fault tolerance, high risk of errors, consider RAID 6 or 10 instead
RAID 6 - two-disk fault tolerance, performance hit compared to RAID 10
RAID 10 - one OR two disk fault tolerance, generally acceptable for both redundancy and performance
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by:Gerald Connolly
Gerald Connolly earned 500 total points (awarded by participants)
ID: 41817367
Nice summary from power edge, you can also look at this
  https://en.m.wikipedia.org/wiki/RAID 
and this
  http://www.thegeekstuff.com/2010/08/raid-levels-tutorial
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by:satheesh kumar
ID: 41844272
Thank you Experts.
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by:netcmh
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Answers were provided.
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by:netcmh
ID: 41846461
Thank you for the grade. Good luck.
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by:Gerald Connolly
ID: 41846473
@netcmh - please dont recomend this web page again (http://www.raid-calculator.com/raid-types-reference.aspx) as it has the wrong definition of RAID10 - we moved on from RAID1+0 and RAID0+1 as different companies had used them to mean the same thing, unfortunately they had become confusing.

So RAID10 was coined to clear up the previous ambiguity and is generally accepted to mean Striped mirrors, ie sets of mirrors (RAID-1) that are striped (RAID-0) unfortunately some idiot in Dell got it the wrong way round and perpetuated the myth.

SO RAID10 is defined as Striped Mirrorsets!

Incidentally neither of those sites show that RAID-5 is now deprecated for business use.
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by:netcmh
ID: 41846480
@Gerald Connolly: Thank you, I appreciate the correction.
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