12 Replies Latest reply on Mar 19, 2010 10:46 AM by Trident911

    MSAHCI with Trim or Intel Maxtrix or RST ??

    jjthenovice

      I have 160 gig g2 and running win 7 64 bit on an HP Pavilion dv6700t CTO T9300 4 gig. ram.  This is kinda a poll.  Go with msahci with trim or use the Matrix or RST drivers without trim and use toolbox.  Which way would you go and why?

       

      Regards

      JJ

        • 1. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
          Ozz

          IMHO, go with msahci with TRIM (i.e. the native win 7 driver). The driver has very decent performance for one that is included with windows. When RST with TRIM is officially released by Intel, then upgrade.

           

          That's my plan anyway because I've used even the latest 'release' of RST and believe they're not quite ready for universal application; some people have had success, some haven't.

          • 2. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
            ambizytl

            I completely agree with Ozz, nothing more to add. Ozz said it all for me.

            • 3. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
              jjthenovice

              Thank you for your reply.  I'm inclined to agree with you.  One problem I have is my WEI score is only 5.9.  When I switched to the iastor it went to 7.7. I'm not sure the WEI really means much thought.  My AS scores and Crystal scores or normal for a SSD so I'm really not sure what is goin on. Here's where it fails:  <Responsiveness Kind="LongIOs" units="units" score="1.9" factor="1.0">47.38687</Responsiveness>

              <Responsiveness Kind="Overall" units="units" score="1.9" factor="1.0">632.57323</Responsiveness>
              <Responsiveness Kind="Cap" Reason="FAILED">TRUE</Responsiveness> .   Here's the strange thing, I installed the latest rst from driver station then switched back to msahci and the score went to 7.7.  However for some reason the cpu fan stayed at max because a rst process was running in background, so i just uninstalled the rst drivers and the wei score went back to 5.9 but the fan problem went away.  Haven't had anymore time to play with this.  Hopefully the Intel drivers will be out soon. Regards  JJ
              r
              • 4. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                Ozz

                Interesting. 7 (x64) here with msahci, and WEI is 7.7. Not sure what is going on there, jj.

                • 5. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                  ambizytl

                  I installed Windows 7 x64 with msahci driver and never switched, and my WEI score remains the same, 7.7

                  • 6. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                    jjthenovice

                    I don't understand this.  IF I install the latest RST drivers and switch to msahci, I get the 7.7 wei.  But my cpu is continually being hammered by iastoragsvc.exe and it never stops?  If I switch to iastor this doesn't happen and I get the 7.7 but no trim of course.  I disabled the iastoragsvc.exe and the wei went back to 5.9.  I can't win.

                    Regards

                    jj

                    • 7. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                      jjthenovice

                      Here's the latest.  If I turn off (un check) write caching on the drive, the wei goes up to 7.7.  Of course my write speeds go down on crystal and AS.  My read speeds stay the same. Not sure why this is?  I beginning to think that the wei is not very accurate...

                      • 8. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                        Fernando

                        jjthenovice schrieb:

                         

                        IF I install the latest RST drivers and switch to msahci, I get the 7.7 wei.  But my cpu is continually being hammered by iastoragsvc.exe and it never stops?  If I switch to iastor this doesn't happen and I get the 7.7 but no trim of course.  I disabled the iastoragsvc.exe and the wei went back to 5.9.  I can't win.

                        The correct name of the EXE file you have mentioned probably is IAStorDataMgrSvc.exe, which is part of the Rapid Storage Technology application.

                        So my uggestion is, that you should uninstall the Intel RST application, if you want to use the generic AHCI driver named MSAHCI.SYS.

                        The Intel RST application is only useful when being run with the Intel RST driver.

                         

                        Regards

                        Fernando

                        • 9. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                          jjthenovice

                          Your're right Fernando, I misspelled the apps name. Thanks for catching that. The orignal subject of my post was whether one should use msachci with trim or RST without trim.  This all started because my WEI score was 5.9 with msahci and 7.7 with RST.  The low WEI score made me wonder if I was getting all that I could from my SSD.  That's why ask the question of switching from msahci to RST. I've since learned that if I disable write caching with the msahci, the WEI goes up to 7.7. Of course my write speeds go down when doing this. My conclusion is: The WEI is not playing well (in some cases) with write caching enabled.  I don't believe that you can trust the WEI in all cases. My CrystalDiskMark and AS scores are around the same with either app.  So, sticking with the msahci and gaining trim makes since.

                          • 10. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                            ambizytl

                            I have write-caching enabled and my WEI score is and has been 7.7. My benchmark results with AS SSD are fine, no issues anywhere using msahci with write caching in my system.

                            • 11. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                              Ozz

                              my setup is likewise to ambizytl's; write caching enabled (and the other option, buffer flushing left unticked/off by default in my configuration) and the reported WEI is 7.7 - basically it's just a default configuration of windows 7 - so something still doesn't sound quite right :s

                              • 12. Re: MSAHCI with Trim or Intel Maxtrix or RST ??
                                Trident911

                                If I don't have physcially access to my Dedicated Server, so can't switch to MSAHCI - should I install Intel Matrix or RST if I'm running 2xIntel X25-M in Software Raid0?

                                 

                                What would be my best solution?