Help with Raid 0

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ToxiicHydra

ToxiicHydra

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Aug 2, 2015
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I have 3 storage devices a Samsung 850 120GB SSD for my operating system and two western digital 1TB blue hard drives. The SSD and one of the hard drives are plugged into Sata 3 to get the 6GB/s and the other is plugged into Sata 2 and that gets 3GB/s. I want to know if i do a raid 0 on the two hard drives if it will lower the performance or it wont even reach the threshold of the sata 2 speeds. Thanks in advance.
 
Solution
geofelt
Don't bother.

Raid-0 has been over hyped as a performance enhancer.
Sequential benchmarks do look wonderful, but the real world does not seem to deliver the indicated performance benefits for most
desktop users. The reason is, that sequential benchmarks are coded for maximum overlapped I/O rates.
It depends on reading a stripe of data simultaneously from each raid-0 member, and that is rarely what we do.
The OS does mostly small random reads and writes, so raid-0 is of little use there.
In fact, if your block of data were to be spanned on two drives, random times would be greater.
There are some apps that will benefit. They are characterized by reading large files in a sequential overlapped manner.
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geofelt

geofelt

Titan
Oct 9, 2006
54,295
4,145
174,240
Don't bother.

Raid-0 has been over hyped as a performance enhancer.
Sequential benchmarks do look wonderful, but the real world does not seem to deliver the indicated performance benefits for most
desktop users. The reason is, that sequential benchmarks are coded for maximum overlapped I/O rates.
It depends on reading a stripe of data simultaneously from each raid-0 member, and that is rarely what we do.
The OS does mostly small random reads and writes, so raid-0 is of little use there.
In fact, if your block of data were to be spanned on two drives, random times would be greater.
There are some apps that will benefit. They are characterized by reading large files in a sequential overlapped manner.
 
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