3 Replies Latest reply on Jul 28, 2012 9:13 PM by jbmaciel

    S5520SC workstation board fan full speed

    jbmaciel

      Hi everyone,

       

      I just build a system with the following configuration:

       

      S5520SC (updated to the lastest firmware)

      Case Chenbro SR104 with 2x120cm fans (front and back) plus 80cm for the drive cage (all PWM).

      2x Xeon X5570 with BXSTS100C coolers

      6x4GB ECC UDIMM

      Nvidia GTX 580

      AOC-SASLP-H8iR RAID controller

      Windows 7 Enterprise

       

      Problem:

       

      Every cold boot the fans go to full speed and they don´t go down. I have to do a warm boot to system starts to trottle the fans.

       

                      cold boot warm boot

      CPU1          7316        3069
      CPU2          7037        3162
      SYSFAN1    1265         552
      SYSFAN3    1900         900
      SYSFAN5    1340         940

       

      Am I missing something? Any help?

       

      Thank you very much.

       

      Joselito Maciel.

        • 1. Re: S5520SC workstation board fan full speed
          Dan_O

          Update the FRU, and make sure you choose "custom chassis" or "other", and program just the fans you have.

           

          Also, check the System Event Log (SEL) to see if it is reporting any other hardware issues that might be causing high fan speeds.

          • 2. Re: S5520SC workstation board fan full speed
            jbmaciel

            I already did that.

            I am going to check SEL.

             

            Thank you.

            • 3. Re: S5520SC workstation board fan full speed
              jbmaciel

              I finally checked the system with Selviewer (I had a PSU burned).

              The Selviewer reports a error in the SYSFAN1, as follow:

               

              13     07/25/2012-23:11:22     Fan /System Fan 1 (#0x37)     Warning event: System Fan 1 reports the sensor is in a low, but non-critical, and going lower state.  Sensor reading: 0 RPM.  Threshold value: 391 RPM.     BMC - LUN #0 (Channel #00h)

               

              14     07/25/2012-23:11:22     Fan /System Fan 1 (#0x37)     CRITICAL event: System Fan 1 reports the sensor is in a low, critical, and going lower state.  Sensor reading: 0 RPM.  Threshold value: 322 RPM.     BMC - LUN #0 (Channel #00h)

               

              17     07/25/2012-23:11:27     Fan /System Fan 1 (#0x37)     Informational event: System Fan 1 reports the sensor is no longer in a critically low state.  Sensor reading: 575 RPM.  Threshold value: 322 RPM.     BMC - LUN #0 (Channel #00h)

               

              18     07/25/2012-23:11:27     Fan /System Fan 1 (#0x37)     Informational event: System Fan 1 reports the sensor is no longer in a low non-critical state.  Sensor reading: 575 RPM.  Threshold value: 391 RPM.     BMC - LUN #0 (Channel #00h)

               

              I replaced with the SYSFAN3, but the error went FAN3...So I replaced the fan with a new one. Now it is working ok. The workstation is very quiet now.

               

               

              It looks like there is a timing problem or bug with BMC code. The explanation is: when I did the warm boot the BMC is restarted but the fan was already running. So it reads the right value, but in the cold boot probably the fan is not stable enough (lines 13 and 14), so BMC reads the wrong value. After the boot the fan is ok (lines 17 and 18), but BMC keeps with the wrong value (I assume).

               

              Problem SOLVED.

               

              Thank you,

               

              Joselito Maciel.