SSD Raid write speeds faster than read!!!!

TPWilko · 14 Jul 2012 at 12:16

I have recently just setup raid 0 on 2 Sandisk extreme 120Gb SSD but write speeds are faster than my read speeds has anyone else known of this problem or how i can fix it?

Smoogels · 14 Jul 2012 at 12:45

Is this a problem? :S

What are your read and write speeds?

TPWilko · 14 Jul 2012 at 13:03

Smoogels said:
Is this a problem? :S

What are your read and write speeds?

I was just under the impression that read speeds where allways faster than write speeds.

My speeds are read 705Mb/s and write 826Mb/s and the 4K speeds are read 37Mb/s and write 116Mb/s..

Orcvader · 14 Jul 2012 at 13:39

Run ATTO: http://www.techpowerup.com/downloads/1749/ATTO Disk Benchmark v2.46.html
Then post a screenshot of it.

Your sig is too big as well, it needs to be 4 lines max.

TPWilko · 14 Jul 2012 at 14:04

Orcvader said:
Run ATTO: http://www.techpowerup.com/downloads/1749/ATTO Disk Benchmark v2.46.html
Then post a screenshot of it.

Your sig is too big as well, it needs to be 4 lines max.

Heres my screenshot of the speed as requested...

Orcvader · 14 Jul 2012 at 14:15

Could have at least cropped the picture

.

But yes, seems a bit weird for the write speeds to be higher than the read speeds. Could be the RAID controller? Not sure what you can do to fix it, but it's blazing fast anyway not to affect performance.

drunkenmaster · 14 Jul 2012 at 14:19

It's not, raided write speeds on two higher end ssd's is usually faster than the write, Vertex 4's are the same(if you assume they are the fastest drives around). Likewise 4kb random write is higher than random read on basically any single or raid setup on the past 4-5 generations of drives, random read is basically capped to circa 30mb's and has been for 3 years, random write is much easier for the controller to deal with.

TPWilko · 14 Jul 2012 at 14:27

Orcvader said:
Could have at least cropped the picture .

But yes, seems a bit weird for the write speeds to be higher than the read speeds. Could be the RAID controller? Not sure what you can do to fix it, but it's blazing fast anyway not to affect performance.

Yes i will crop my pictures in the future lol. i am using the onboard raid.

TPWilko · 14 Jul 2012 at 14:30

drunkenmaster said:
It's not, raided write speeds on two higher end ssd's is usually faster than the write, Vertex 4's are the same(if you assume they are the fastest drives around). Likewise 4kb random write is higher than random read on basically any single or raid setup on the past 4-5 generations of drives, random read is basically capped to circa 30mb's and has been for 3 years, random write is much easier for the controller to deal with.

Thanks for the info this really did confuse me before....