Why does a SATA hard drive have jumpers?












19














Back in the days of PATA hard drives, a person used jumpers on the drive to indicate whether the drive was the master or the slave of the channel, or to let the cable select which drive was which.



SATA drives are one-per-channel, one-per-cable, etc.



What are the jumpers for on SATA hard drives?










share|improve this question





























    19














    Back in the days of PATA hard drives, a person used jumpers on the drive to indicate whether the drive was the master or the slave of the channel, or to let the cable select which drive was which.



    SATA drives are one-per-channel, one-per-cable, etc.



    What are the jumpers for on SATA hard drives?










    share|improve this question



























      19












      19








      19


      3





      Back in the days of PATA hard drives, a person used jumpers on the drive to indicate whether the drive was the master or the slave of the channel, or to let the cable select which drive was which.



      SATA drives are one-per-channel, one-per-cable, etc.



      What are the jumpers for on SATA hard drives?










      share|improve this question















      Back in the days of PATA hard drives, a person used jumpers on the drive to indicate whether the drive was the master or the slave of the channel, or to let the cable select which drive was which.



      SATA drives are one-per-channel, one-per-cable, etc.



      What are the jumpers for on SATA hard drives?







      hard-drive sata jumper






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Feb 3 '10 at 12:47

























      asked Oct 16 '09 at 17:29









      eleven81

      7,373114676




      7,373114676






















          5 Answers
          5






          active

          oldest

          votes


















          15














          Some SATA drivers have jumpers for extra features, or for troubleshooting.



          Example from the manual of a Western Digital SATA disk:




          Set the Jumpers



          The default setting for WD SATA hard
          drives varies depending on the model.
          To determine the default setting for
          your drive, look at the drive label on
          the top of the drive.



          DO NOT change
          the default setting if you intend to
          use the drive in a desktop computer.



          Change the jumper settings ONLY if you
          intend to use the drive in an
          enterprise storage environment. For
          more information on these advanced
          settings, obtain the full version WD
          SATA Installation Guide at
          support.wdc.com.



          SSC_DIS Mode
          (Default) — Enable or disable the
          spread spectrum clocking feature.
          Default setting is disabled.



          OPT1 — Only for factory use.



          OPT2 — Only for
          factory use.







          share|improve this answer





























            15














            On SATA-II drives, a jumper is sometimes used to set the drive into SATA-I mode for compatibility with older controllers.






            share|improve this answer





























              4














              Some SATA drives have jumpers to enable/disable 3Gb/s functionality or other backwards compatibility items.






              share|improve this answer





























                1














                See for example this.






                share|improve this answer





























                  1














                  On a Seagate ST3500320AS, there are four pins in the jumper block. You put a jumper between two of them to limit the drive to 1.5Gb/s instead of 3Gb/s, as explained in the manual. But what are the other two?



                  As shown on this page, the other two pins (plus the nearest of the pair of pins used to limit the drive speed, which is a ground) make a serial port, which talks directly to the drive firmware!






                  share|improve this answer





















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                    5 Answers
                    5






                    active

                    oldest

                    votes








                    5 Answers
                    5






                    active

                    oldest

                    votes









                    active

                    oldest

                    votes






                    active

                    oldest

                    votes









                    15














                    Some SATA drivers have jumpers for extra features, or for troubleshooting.



                    Example from the manual of a Western Digital SATA disk:




                    Set the Jumpers



                    The default setting for WD SATA hard
                    drives varies depending on the model.
                    To determine the default setting for
                    your drive, look at the drive label on
                    the top of the drive.



                    DO NOT change
                    the default setting if you intend to
                    use the drive in a desktop computer.



                    Change the jumper settings ONLY if you
                    intend to use the drive in an
                    enterprise storage environment. For
                    more information on these advanced
                    settings, obtain the full version WD
                    SATA Installation Guide at
                    support.wdc.com.



                    SSC_DIS Mode
                    (Default) — Enable or disable the
                    spread spectrum clocking feature.
                    Default setting is disabled.



                    OPT1 — Only for factory use.



                    OPT2 — Only for
                    factory use.







                    share|improve this answer


























                      15














                      Some SATA drivers have jumpers for extra features, or for troubleshooting.



                      Example from the manual of a Western Digital SATA disk:




                      Set the Jumpers



                      The default setting for WD SATA hard
                      drives varies depending on the model.
                      To determine the default setting for
                      your drive, look at the drive label on
                      the top of the drive.



                      DO NOT change
                      the default setting if you intend to
                      use the drive in a desktop computer.



                      Change the jumper settings ONLY if you
                      intend to use the drive in an
                      enterprise storage environment. For
                      more information on these advanced
                      settings, obtain the full version WD
                      SATA Installation Guide at
                      support.wdc.com.



                      SSC_DIS Mode
                      (Default) — Enable or disable the
                      spread spectrum clocking feature.
                      Default setting is disabled.



                      OPT1 — Only for factory use.



                      OPT2 — Only for
                      factory use.







                      share|improve this answer
























                        15












                        15








                        15






                        Some SATA drivers have jumpers for extra features, or for troubleshooting.



                        Example from the manual of a Western Digital SATA disk:




                        Set the Jumpers



                        The default setting for WD SATA hard
                        drives varies depending on the model.
                        To determine the default setting for
                        your drive, look at the drive label on
                        the top of the drive.



                        DO NOT change
                        the default setting if you intend to
                        use the drive in a desktop computer.



                        Change the jumper settings ONLY if you
                        intend to use the drive in an
                        enterprise storage environment. For
                        more information on these advanced
                        settings, obtain the full version WD
                        SATA Installation Guide at
                        support.wdc.com.



                        SSC_DIS Mode
                        (Default) — Enable or disable the
                        spread spectrum clocking feature.
                        Default setting is disabled.



                        OPT1 — Only for factory use.



                        OPT2 — Only for
                        factory use.







                        share|improve this answer












                        Some SATA drivers have jumpers for extra features, or for troubleshooting.



                        Example from the manual of a Western Digital SATA disk:




                        Set the Jumpers



                        The default setting for WD SATA hard
                        drives varies depending on the model.
                        To determine the default setting for
                        your drive, look at the drive label on
                        the top of the drive.



                        DO NOT change
                        the default setting if you intend to
                        use the drive in a desktop computer.



                        Change the jumper settings ONLY if you
                        intend to use the drive in an
                        enterprise storage environment. For
                        more information on these advanced
                        settings, obtain the full version WD
                        SATA Installation Guide at
                        support.wdc.com.



                        SSC_DIS Mode
                        (Default) — Enable or disable the
                        spread spectrum clocking feature.
                        Default setting is disabled.



                        OPT1 — Only for factory use.



                        OPT2 — Only for
                        factory use.








                        share|improve this answer












                        share|improve this answer



                        share|improve this answer










                        answered Oct 16 '09 at 17:37









                        Snark

                        28.9k67689




                        28.9k67689

























                            15














                            On SATA-II drives, a jumper is sometimes used to set the drive into SATA-I mode for compatibility with older controllers.






                            share|improve this answer


























                              15














                              On SATA-II drives, a jumper is sometimes used to set the drive into SATA-I mode for compatibility with older controllers.






                              share|improve this answer
























                                15












                                15








                                15






                                On SATA-II drives, a jumper is sometimes used to set the drive into SATA-I mode for compatibility with older controllers.






                                share|improve this answer












                                On SATA-II drives, a jumper is sometimes used to set the drive into SATA-I mode for compatibility with older controllers.







                                share|improve this answer












                                share|improve this answer



                                share|improve this answer










                                answered Oct 16 '09 at 17:33









                                quack quixote

                                35k1086119




                                35k1086119























                                    4














                                    Some SATA drives have jumpers to enable/disable 3Gb/s functionality or other backwards compatibility items.






                                    share|improve this answer


























                                      4














                                      Some SATA drives have jumpers to enable/disable 3Gb/s functionality or other backwards compatibility items.






                                      share|improve this answer
























                                        4












                                        4








                                        4






                                        Some SATA drives have jumpers to enable/disable 3Gb/s functionality or other backwards compatibility items.






                                        share|improve this answer












                                        Some SATA drives have jumpers to enable/disable 3Gb/s functionality or other backwards compatibility items.







                                        share|improve this answer












                                        share|improve this answer



                                        share|improve this answer










                                        answered Oct 16 '09 at 17:35









                                        dlux

                                        3,05872630




                                        3,05872630























                                            1














                                            See for example this.






                                            share|improve this answer


























                                              1














                                              See for example this.






                                              share|improve this answer
























                                                1












                                                1








                                                1






                                                See for example this.






                                                share|improve this answer












                                                See for example this.







                                                share|improve this answer












                                                share|improve this answer



                                                share|improve this answer










                                                answered Oct 16 '09 at 17:35









                                                sYnfo

                                                1,84211113




                                                1,84211113























                                                    1














                                                    On a Seagate ST3500320AS, there are four pins in the jumper block. You put a jumper between two of them to limit the drive to 1.5Gb/s instead of 3Gb/s, as explained in the manual. But what are the other two?



                                                    As shown on this page, the other two pins (plus the nearest of the pair of pins used to limit the drive speed, which is a ground) make a serial port, which talks directly to the drive firmware!






                                                    share|improve this answer


























                                                      1














                                                      On a Seagate ST3500320AS, there are four pins in the jumper block. You put a jumper between two of them to limit the drive to 1.5Gb/s instead of 3Gb/s, as explained in the manual. But what are the other two?



                                                      As shown on this page, the other two pins (plus the nearest of the pair of pins used to limit the drive speed, which is a ground) make a serial port, which talks directly to the drive firmware!






                                                      share|improve this answer
























                                                        1












                                                        1








                                                        1






                                                        On a Seagate ST3500320AS, there are four pins in the jumper block. You put a jumper between two of them to limit the drive to 1.5Gb/s instead of 3Gb/s, as explained in the manual. But what are the other two?



                                                        As shown on this page, the other two pins (plus the nearest of the pair of pins used to limit the drive speed, which is a ground) make a serial port, which talks directly to the drive firmware!






                                                        share|improve this answer












                                                        On a Seagate ST3500320AS, there are four pins in the jumper block. You put a jumper between two of them to limit the drive to 1.5Gb/s instead of 3Gb/s, as explained in the manual. But what are the other two?



                                                        As shown on this page, the other two pins (plus the nearest of the pair of pins used to limit the drive speed, which is a ground) make a serial port, which talks directly to the drive firmware!







                                                        share|improve this answer












                                                        share|improve this answer



                                                        share|improve this answer










                                                        answered Aug 16 '11 at 11:07









                                                        CesarB

                                                        3,94512222




                                                        3,94512222






























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