1 Reply Latest reply on Jan 9, 2016 7:02 PM by paramountain

    Poor performance of Intel SRT caching


      I have poor performance with SSD caching under Windows 8.1, with all driver versions.

      Windows 8.1 was freshly installed and patched up with all available patches upto now (used to have Win10, but reverted).


      Problem is poor read performance on drives that have SSD caching turned on.


      On a side-note, I used to have Win8.1 before, and it worked fine - although with RST, since any newer version suffered from spindown/spinup issue during shutdown (there is another thread for this issue, and latest driver version is still the same).


      However, now with Windows 8.1 freshly installed, I have this issue.


      I tried several different driver versions: (latest driver)

      - all with same result: poor performance with SSD caching on.


      My config:
      Asrock Z68Pro3 with I5-2500K and 16GB RAM.


      Samsung EVO 250GB (OS disk)

      OCZ Vertex3 64GB (used to Intel SRT caching)

      1.5TB Seagate disk

      3x 1TB Hitachi disks, which are bundled into one RAID0 volume


      I used to have SSD caching on RAID0 volume, and it used to work fine, but now I have poor performance.

      As soon as I remove caching, performance is fine (as can be seen on HD Tune and copying file to OS disk).

      Same issue happens if I accelerate 1.5TB Seagate disk.





      .. same result with


      With caching off, I have same performance across all drivers, and it works as expected:



      I tested SSD drive itself, which works fine:

      200MB/s writes and 350MB/s read speeds.


      There is one oddity though, which ONLY happens on version: If I remove cache disk, set it to available, and again create disk acceleration, accelerated disk works fine - sequential read speeds are as expected, and caching works (tested).

      However, as soon as I reboot, performance drops.


      Since this configuration used to work fine, seems it might be some Windows patch which conflicts with drivers, or something similar.


      But... now main question - how do I regain normal disk speeds with caching on?

      Any/all suggestions welcome.

        • 1. Re: Poor performance of Intel SRT caching

          "There is one oddity though, which ONLY happens on version"


          I can confirm that has some serious problems. I just rebuilt a W-7 64-bit DZ68BC PC, using the caching portion of RST with an Intel 330 SSD. I got the entire system built with chipset mode set to RAID and then installed RST, but as soon as I enabled acceleration, the system went into an infinite loop so bad that the system clock no longer updated. I had to power-down, disconnect the cache drive, reboot, and type CNTL-I to enter RAID configuration in order to enable the system drive because RST had explicitly disabled the system drive. After I enabled the system drive, I logged on and moved back in time to a restore point (I wisely created one just before installing RST). After a reboot, I noticed that I no longer saw the RAID data displayed after Intel's BIOS image. I got back into BIOS and noticed that an F9 had been executed, resetting everything back to default (DZ68BC does that sometimes), but the best part was that chipset mode had been reset to AHCI. Even the registry settings were in accordance with AHCI. SSD Toolbox full diag scan found nothing on the 330 SSD.