3 Replies Latest reply on Dec 9, 2018 7:00 AM by ManivelR

    VSAN best practices related question

    ManivelR Enthusiast

      Hi All,

       

      I have a doubt about VSAN RAID controller queue depth & write cache.

       

      1) We are using Dell PERC H710 RAID controller. Is there any recommended queue depth available to this H710 controller ? By default it is 64. May i know what is the recommended value to reset the queue depth? It is 256 or more ?

       

      2) Do we need to disable write cache from this RAID controller ?  i have not seen any options to disable. Is this must ?

       

      Thanks you in advance.

       

      Manivel Rajarathinam.

        • 1. Re: VSAN best practices related question
          Darking Novice

          The h710 controller is not supported on current releases of vsan.

           

          What release are you running?

           

          I would recommend a h330 hba since it's well supported

          • 2. Re: VSAN best practices related question
            TheBobkin Virtuoso
            VMware EmployeesvExpert

            Hello Manivel,

             

             

            "Is there any recommended queue depth available to this H710 controller ? By default it is 64. May i know what is the recommended value to reset the queue depth? It is 256 or more ?"

            You want the QD set as high as possible - 975 for a H710P controller, though do note that this is not a great controller and I would advise acquiring something more modern if possible.

             

            "Do we need to disable write cache from this RAID controller ?  i have not seen any options to disable. Is this must ?"

            The cache should be set to 100% read or disabled - this should be configurable in the BIOS.

             

             

            Bob

            • 3. Re: VSAN best practices related question
              ManivelR Enthusiast

              Thanks so much Bob.Right now we have this controller only h710.I already told to get another recommended controller and awaiting response.

               

              I mistakenly sent as 64(QD) and it is currently pointed as 971(i checked in ESXTOP--->D--).It is the maximum one.

               

              Sure i will check on BIOS once(write cache).

               

              Thanks,

              Manivel R