Raid 0 Issue

[SlipperyPete]

I am having issues with Raid 0 Performance. I have 2 Samsung 850 Evo's 250gb each. I have raid 0ed them both with Intel Raid built on to my mother board. I also used a dedicated raid controller. However I am only achieving 450-550mb/s. I tried 2 sandisk drives and they can achieve 800-950mb/s. Why am I having a issue with the 850 drives in raid 0?

[SlipperyPete]

bump

[Electronics Wizardy]

Have you tested the speed of them induvually?

What raid controller?

[SlipperyPete]

12 hours ago, Electronics Wizardy said:

Have you tested the speed of them induvually?

What raid controller?

the speeds individually are fine and the raid controller is the one built into my motherboard

and it does offer raid support

[Electronics Wizardy]

5 minutes ago, SlipperyPete said:

the speeds individually are fine and the raid controller is the one built into my motherboard

and it does offer raid support

Try running raid in windows Whawt speeds do you get?

[Captain_WD]

On 29.05.2016 г. at 8:44 PM, SlipperyPete said:

~snip~

Hey there SlipperyPete

 

Could you post screenshots of the benchmarked speeds (with the RAPID feature off) of each SSD and then the benchmark of the RAID array?  Also could you make sure the RAID setup in BIOS is properly done according to the motherboard manual? There may be some limitations to the speed or the ports used. Could you verify that the total storage space on the RAID0 array is ~500GB? 

 

I'd also suggest to try the Striped volume in Disk Management and see if there's any difference

 

Making sure all the drivers, the OS and the BIOS are on their latest version is also a good idea! 

 

Captain_WD.

[SlipperyPete]

23 hours ago, Electronics Wizardy said:

-snip-

windows was tried as well but the speeds were the same

14 hours ago, Captain_WD said:

-snip-

i would but this is actually an issue my friend was having and i was asking for him. 

[leadeater]

What did you use to test/benchmark the array to get that 450MB/s-550MB/s? The 850 EVO's should RAID 0 fine but keep in mind they were not designed to be used like that, have seen plenty of reviews showing RAID 0 on the EVO works fine though.

 

Also don't RAID them using a hardware controller, TRIM is not supported in that scenario so performance will be pretty bad and will cause undue wear. I've had issues with hardware RAID (IBM M5110 & LSI 9631 w/ Fast Path) on both 840 Pro's and 850 Pro's. Intel onboard RAID is fine and TRIM works. 

[dalekphalm]

4 hours ago, SlipperyPete said:

windows was tried as well but the speeds were the same

i would but this is actually an issue my friend was having and i was asking for him. 

We need way more information to actually help and solve the issue. Your friend is either going to have to come on here himself to get more help, or he's going to have to let you have access whenever you need it, so you can take screenshots, do tests, report results to us, etc.