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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(C drive):

Strip size:64kb hardware raid-5 for nvme(D drive)

Other benchmark app.

Other benchmark app.

Hd tune read result

Strip size:128kb hardware raid-5 for ssd(E drive):

Strip size:128kb hardware raid-5 for ssd(F drive):

Non-raid ssd:

Update:

I'm sorry for the confusion. I didn't realize that I sent the article before it was completed.

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:

                      READ          WRITE
    SEQ1M (Q8T1)      50.68         96.88        MB/s
    SEQ1M (Q1T1)      54.08         25.13        MB/s
    RND4K (q32T1)     4.07          1.44         MB/s
    RND4K (Q1T1)      8.83          0.53         MB/s

System information:

Intel® Core™ i9-13900K Processor 36M Cache, up to 5.80 GHz

MSI MAG Z790 Tomahawk WiFi

4 x SNV2S/500G (Nvme)

ST2000NM0011 (SSD)

ST2000DM008-2UB102 (SSD)

TOSHIBA HDWD320 (SSD)

Configurations:

VMD controller                                = enabled
VMD Global Mapping                            = enabled
Intel Rapid Recovery Technology               = enabled
RRT volumes can span internal and eSATA dri   = enabled
ZPODD                                         = enabled
M.2_1 Max Link Speed                          = Gen4
PCIE_E1 Max Link Speed                        = Gen5
Extended Synch                                = enabled
Re-Size BAR Support                           = enabled
Native PCIE                                   = disabled
Native ASPM                                   = auto

All drivers updated latest version from msi.

Intel rapid storage technology product version : 19.0.1042.0
Intel rapid storage technology driver version  : 19.5.0.1037

The read speeds of both nvme and ssds are a bit slower than the manufacturer describes. And also the write speeds are extremely slow. I'm looking for a way to increase these speeds, especially the write speed. But I couldn't find it. I need your help to optimize these speeds.

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  • 2
    I fail to see a short precise actionable question here. I also fail to see even an info about the hardware.
    – TomTom
    Jul 14 at 9:48
  • When stripe size is reduced, interrupt frequency is increased = takes longer. 128k vs 16k has 8 times less interrupts to deal with 128k stripe size vs 16k. Welcome to SF.
    – Wilson Hauck
    Jul 14 at 13:18
  • Hardware Raid-5 will always be faster than Software Raid-5. Again because with Software Raid-5, the OS has the duty to provide the management rather than depending on the Hardware management. When possible allow Hardware managed services to reduce OS overhead.
    – Wilson Hauck
    Jul 14 at 13:25
  • I didn't realize I had sent the article before it was completed, @TomTom.
    – Burak Kocaman
    Jul 14 at 14:39
  • Thank you @Wilson Hauck . And I found the setting you mentioned. OS now controls raid volumes, but speeds are the same.
    – Burak Kocaman
    Jul 14 at 14:40

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