Rapid Storage Technology
Intel® RST, RAID
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RAID-5 read speed is very slow

Burak_K
Beginner
2,662 Views

I have windows 11 pro for workstation and use 2 RAID-5 volumes for storage (nvme group and ssd group). The read speed for the nvme group is around 2220 MB/s and the write speed is around 170 MB/s. SSD group counts as the same.

I tried 128kb, 64kb, 32kb and 16kb for stripe size, but the speed drops as the stripe size gets smaller.

I also tried hardware and software raid-5. Software raid-5 was slower.

 

Here are the data i have:

 

Strip size:64kb hardware raid-5 for nvme:

13.png14.png

6.pngAdsız.png

11.png

 

Strip size:128kb hardware raid-5 for ssd:

15.png16.png

12.png

 

Non-raid ssd:

17.png

 

Strip size:128kb,32kb and 16kb hardware raid-5 for nvme:

I forgot to take a picture in my tests for this, but 16kb strip size had dropped to double digits.

 

Strip size:64kb,32kb and 16kb hardware raid-5 for ssd:

I forgot to take a picture in my tests for this, but 16kb strip size had dropped to single digits.

 

Strip size:128kb software raid-5 for ssd:

sw raid5 128k.png

 

System information:

ST2000NM0011 (SSD)
ST2000DM008-2UB102 (SSD)
TOSHIBA HDWD320 (SSD)
 
Configurations:

WhatsApp Image 2023-07-14 at 11.18.11.jpegWhatsApp Image 2023-07-14 at 11.18.09.jpeg

WhatsApp Image 2023-07-14 at 11.18.12.jpegWhatsApp Image 2023-07-14 at 11.18.14.jpegWhatsApp Image 2023-07-14 at 11.18.19.jpeg10.png18.png

 

Driver Version:

All drivers updated latest version from msi. 

rapidver.png

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Jocelyn_Intel
Employee
2,628 Views

Hello, @Burak_K  

 

Thank you for posting on the Intel® communities.  

 

I am sorry to hear what is happening with your RAID 5. 

 

We tried to replicate your issue in a RAID 5 with the latest Intel® RST version, however, our results were the expected and great hence this issue might be related to the Motherboard or the drives. 

 

2.JPG1.JPG

 

Best regards,  

Jocelyn M.   

Intel Customer Support Technician. 

 

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