How many hdd in raid0?

RAID0 requires at least 2 HDD's/SSD's, and the only constraint on the max number in an array (theoretically anyway) is the amount of ports available on your (RAID) controller, but the more HDD's that you have in the array, the bigger the chances of it failing, so generally the most pratical setup is a 2 HDD/SDD array...see Here
 
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RAID5 will give you reads that are nearly as good as RAID0, but I believe (having never tried it myself) that writes are much slower due to the overhead of calculating parity.

I've got RAID0 for my Windows installation, although this is with SSDs so the chance of failure is lower.

As joeyjojo says,

Failure is n times more likely for n disks than running single disks alone, as a single failure leads to total data loss.
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...but given that the chance of a disk failing is relatively small, I'm not sure the worry of RAID0 being unsafe is altogether rational. If you are storing anything important, you'll have it backed up elsewhere... ;)
 
matt_griff said:
So I could put 4 Samsung F3 in raid0 and would the read and write speeds be 4x the single drive?
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Not exactly four times. Sustained read ought to increase by around 4. Burst speeds go off the chart but they're not particularly useful. Random access stays similar iirc. could be wrong.
 
I Have 2 Samsung F3's in Raid 0, Very Good Performance,

But i'd say go for 4! :D

You'd be hitting about 500mb/s ish Read and write (Theoretically.)
 
TBH from my experience in reality your just as likely (or unlikely) to lose data from running RAID0 or even a proper redundant flavor of RAID as a single disc - I've seen failure of entire RAID5 arrays with complete data loss about as often as a single drive. For true backup purposes its better to use a regular software mirror to seperate drives each running a standard filesystem. (My backup NAS has software write duplication to external USB HDDs as well as to the internal RAID5).

Unless your using the drives for media encoding or similiar your better off getting an SSD if its performance your after.
 
joeyjojo said:
Not exactly four times. Sustained read ought to increase by around 4. Burst speeds go off the chart but they're not particularly useful. Random access stays similar iirc. could be wrong.
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are burst rates meant to go up ? my single caviar black has higher burst rates than my 2 250gb wd re drives in raid 0
 
chipps101 said:
are burst rates meant to go up ? my single caviar black has higher burst rates than my 2 250gb wd re drives in raid 0
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Your caviar black probably does 230-250 burst? A raid 0 of two disks ought to be bursting 350-400.

But average read and access times are much more important.
 
not getting anywhere near the burst rates you are mentioning :( here is a screenshot



just using the onboard raid controller on my p5k premium and not a raid card or anything.
 
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