Question Boost SSD performance using RAID-0? If not, why?

[Mugsy]

I used to use RAID-0 to boost the speed/bandwidth of my HDD boot drive. I keep reading that RAID-0 won't improve the speed of an SSD.

That makes no sense to me. And now that SSD dram pricing is falling like a rock, I'm wondering if two cheap SSD's raid'ed together might give performance comparable to drives that cost more than twice the $/GB?

 

[RealBeast]

It won't help because it doesn't improve random I/O, although it will make large file sequential benchmarks look better -- that is not what most people do with their computers.

Where sequential large file R/W matters, on big storage arrays, most people like me still use spinning rust RAID 5 or 6. The business case for NAND use in such storage is very expensive and would not be RAID 0 anyway.

 

[Mugsy]

It won't help because it doesn't improve random I/O, although it will make large file sequential benchmarks look better -- that is not what most people do with their computers.

Thanks. Though I've never understood why reading twice as much data at once though two SATA connections at double the bandwidth doesn't nearly double your data rates in all situations?

 

[Deleted member 14196]

It’s because most operations that you do in a normal daily life don’t require that kind of bandwidth so in most cases you won’t even notice it. Plus Raid is a big pain in the butt Due largely to the fact that you now have multiple points of failure which means you have increased odds of failure which means if you don’t keep back ups like most people don’t you lose everything when you lose one drive

 

[USAFRet]

I used to use RAID-0 to boost the speed/bandwidth of my HDD boot drive. I keep reading that RAID-0 won't improve the speed of an SSD.

That makes no sense to me. And now that SSD dram pricing is falling like a rock, I'm wondering if two cheap SSD's raid'ed together might give performance comparable to drives that cost more than twice the $/GB?

Read through these:

SATA III SSD:

http://www.tomshardware.com/reviews/ssd-raid-benchmark,3485.html

NVMe SSD:

http://www.tomshardware.com/reviews/samsung-950-pro-256gb-raid-report,4449.html

 

[prophet51]

windows software raid 0 is actually fast for small reads too, only problem is you can't boot from software raid 0. Most motherboard raid 0 benches I've seen the raid array has worse 4k r/w performance than a single drive.