7 Replies Latest reply on Jul 31, 2013 9:35 AM by sylvia_intel

    Intel DH77DF mSata 6 Gbps capabilities

    Wam

      Hi,

       

      I'm about to build a mini ITX Server using a DH77DF MB with an i7 3770.

       

      I'm gonna be using the 2 x Sata 6 Gbps ports to host a RAID 0 array (HDDs) and the 2 x Sata 3 Gbps

      for a RAID 1 (also HDDs), so there will be no Sata connector left. Thus, I will need to use the mSata

      port to put one of your new 525 SSD which will serve as a VM datastore.

       

      So, here are my questions :

       

      1) I understand that the mSata port uses an adapter to be fitted in the PCIe slot. So, in other

      words, if I want to use mSata at all, I can say good bye to the PCIe 16x slot, is that correct ?

       

      2) Now, speed-wise, from what I gathered, mSata does handle Sata 3 speeds but is ultimately handled

      by the H77 Sata controller which only supports 2 drives in Sata 3 / 6 Gbps mode.

      So, which disks will have priority for Sata 3 speed in that case (2xSata3 + mSata connected) ?

      I'm guessing not the mSata...

       

      3) If so, will I be able to set the Sata 3 ports to run at Sata 2 speed so that only the mSata runs

      @6Gbps and the other four HDDs @3Gbps (as Sata 3 is really not needed for HDDs) ?

       

       

      Best regards

        • 1. Re: Intel DH77DF mSata 6 Gbps capabilities
          Wam

          Anyone ?

          No one at Intel knowing this ?

          • 2. Re: Intel DH77DF mSata 6 Gbps capabilities
            Victor_Intel

            Hello Wam, I will try to answer your questions.

             

            1) If you install a Solid-State Drive on the PCI Express* slot, you wont be able to use it for anything else.

             

            2) If you install the Solid-State Drive on the PCI Express* the bus that will be used if for the PCI Express*, you shouldn't have any problems related to speed.

             

            3) There is no way to force the SATA ports to work at a different specification and there is no need to as per what I explained before.

             

            Regards.

            1 of 1 people found this helpful
            • 3. Re: Intel DH77DF mSata 6 Gbps capabilities
              Wam

              Hi Victor,

               

              Thank you for your answer, but that's not exactly what I was asking for point #2.

               

              Yes, I know the PCI Express bus will be used, but I'm actually worried about the Sata controller. Are you saying that both disks connected to the Sata 3 ports AND the mSata SSD will run at 6 Gbps ?

              That's my real problem here as the chipset is only supposed to handle 2 Sata 3 disks as per the H77 specification.

               

              Best regards.

              • 4. Re: Intel DH77DF mSata 6 Gbps capabilities
                Victor_Intel

                Hello, as per the information that we have, the PCI Express* controller should be able to work at 6Gbps transfer speeds.

                 

                Regards.

                • 5. Re: Intel DH77DF mSata 6 Gbps capabilities
                  Wam

                  Well, to be honest, I really thought (when I first asked) that I would get a confirmation that mSata would not run at 6Gpbs because that would go against the H77 PCH specifications (section 1.5.4) which states it handles only two sata 3 interfaces and 4 sata 2.

                   

                  I guess I'm gonna have to test it to find out, as it seems difficult to get a definitive technical explanation.

                   

                  Thank you for your time.

                   

                  Best Regards.

                  • 6. Re: Intel DH77DF mSata 6 Gbps capabilities
                    Hauler

                    I installed a Toshiba THNSNH128GMCT 128 Gb SATA 6 Gb/s SSD into DH77DF's mSata slot and it actually works at only SATA 3Gb/s.

                               Sequential Read :   270.513 MB/s

                              Sequential Write :   167.024 MB/s

                             Random Read 512KB :   246.356 MB/s

                            Random Write 512KB :   166.772 MB/s

                        Random Read 4KB (QD=1) :    21.816 MB/s [  5326.2 IOPS]

                       Random Write 4KB (QD=1) :    53.102 MB/s [ 12964.3 IOPS]

                       Random Read 4KB (QD=32) :   184.863 MB/s [ 45132.5 IOPS]

                      Random Write 4KB (QD=32) :   125.076 MB/s [ 30536.2 IOPS]

                    • 7. Re: Intel DH77DF mSata 6 Gbps capabilities
                      sylvia_intel

                      The PCH support a maximum of two 6.0 Gb/s SATA ports, since this specific motherboard comes with two 6.0 SATA ports (blue regular SATA ports), the speed of the mSata will be a 3.0 Gb/s.

                       

                      You can use a 6.0 Gb/s SSD on that port, but the transfer rate will be 3.0 Gb/s, like in your case.


                      Regards.

                      1 of 1 people found this helpful