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Still worth it to RAID0 SSDs? Failure rates predictable?

fuzzybabybunny

fuzzybabybunny

Moderator<br>Digital & Video Cameras
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Say that you've got 2 reliable SSDs from Samsung or Intel. You want a 128GB or whatever. Is it smarter to just buy one 128GB or pay a small premium for 2 x 64GB and put them in RAID 0?

Or buy a single 128GB with the intention of upgrading to another 128GB in the future when the price falls?

I heard somewhere a while ago that the failure times of good SSDs are actually predictable and so SSDs are great for RAID0. I'm scared of RAID0 with rotary drives because I'm not sure when a rotary drive will fail. It's unpredictable. But a reliable SSD - could it actually predict when it will fail (ie. when the memory will wear out) and thus give me advanced warning to replace them?
 
ssd's are basically running raid inside of them anyway. i've never had a raid failure on my ssd arrays in many years now.
 
If you're worried about a RAID 0 array being trashed should one of the drives go bad...
A. Don't RAID two or more drives in a RAID 0 array.
B. Develop a good backup plan.
C. Buy a 2nd & 3rd drive for a RAID 5 array.
 
Blain said:
If you're worried about a RAID 0 array being trashed should one of the drives go bad...
A. Don't RAID two or more drives in a RAID 0 array.
B. Develop a good backup plan.
C. Buy a 2nd & 3rd drive for a RAID 5 array.
Click to expand...

Still worth it to RAID0 SSDs? Failure rates predictable?
 
fuzzybabybunny said:
Still worth it to RAID0 SSDs? Failure rates predictable?
Click to expand...

depends on what you want to gain from it.

speed? can you tell the difference in your usage between 200-300MB/s and 400-600MB/s?

want trim? still early days of having TRIM work in all RAID implementations. Intel has made a large step, but I do not think it is out (just anounces) currently, and that still leaves a lot of other methods for creating a RAID array.

IOP speed? for the average user, they can not tell the difference from the best now and the worst when SSD's first hit the market. Getting more again is proberly even less noticable.

Access times? RAID has always increased them, not that SSD's are slow to start with, but doubling small, is still small. (ie: proberly no noticable change with SSDs).

What other metric are you looking to use? Because with cost, it is higher at the sizes you are looking at.
 
I wouldn't think its worth the hassle to be honest.

-Lose TRIM

-If a drive dies so does all your data

-RAID0 does nothing for 4k reads. Thus the only speed increase you'll notice is in large sequential. Depends how often you need to sustain 600mb/sec on a file.
 
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