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Seagate st412 and full length xebec controller.

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    Seagate st412 and full length xebec controller.

    Seagate st412 and full length xebec controller. Would inserting the cables the wrong way damage the board and drive?

    #2
    Probably not. Control signals are open-collector; data signals are differential. No power rails over either cable.

    Comment


      #3
      The drive was working fine. I removed the drive and controller to put in an xt-ide card in. Today I decided to put the st412 back in. On booting I get a 1701 error.

      Comment


        #4
        But doing so won't damage the drive, just necessitate a LLF when the cables are straightened out. Floppy drives are also susceptible with this flaw. That's why hooking up a drive with a write-enabled floppy inserted is a bad idea.

        Comment


          #5
          I'll research a LLF.

          EDIT: Reading minuszerodegrees.

          EDIT 2: I've identified the adapter, it's the original supplied with the ST 412. I have an Advanced Diagnostics Disk somewhere. Otherwise i'll use debug to LLF.
          Last edited by fjk61011; May 28, 2021, 12:23 PM.

          Comment


            #6
            Got nowhere with advanced diagnostics or debug

            Comment


              #7
              advanced diagnostics lists the fixed disk but won't llf

              Comment


                #8
                Does the controller have options for multiple formats? I think the later ones had 4 choices, jumpers or something. If it came with the drive, I’d assume it’s set correctly, but it doesn’t hurt to double check.

                Does the drive actually spin up? I recently bought an XT with an ST-412 and the spindle wouldn’t move. Fortunately it’s accessible externally and I was able to stick something non-conductive under the PCB and give it a few good spins (I checked some YouTube videos to make sure I was spinning it the correct direction) and it eventually came to life and started spinning on it’s own.

                Comment


                  #9
                  Thanks. I'll try that later. Not sure if it spins up. I'll check. Might not get around to it till tomorrow "chores, no geeking" I was told

                  Comment


                    #10
                    It's the card that came with drive. According to the photo on minuszero degrees it's the first generation card, no switches or jumpers. The drive did work before I moved it

                    Comment


                      #11
                      1. Make sure that the ribbon cables are attached correctly to the controller card. For example, sometimes when I do not use my reading glasses, I plug in the cable out by a row of pins - per [here].

                      2. See [here]. Sometimes, after multiple de-attach/reattach operations, one of the four metal connectors can open up to the point of making a poor connection. Imagine a poor +12V connection between the power supply and the hard drive.

                      Comment


                        #12
                        Originally posted by modem7 View Post
                        1. Make sure that the ribbon cables are attached correctly to the controller card. For example, sometimes when I do not use my reading glasses, I plug in the cable out by a row of pins - per [here].

                        2. See [here]. Sometimes, after multiple de-attach/reattach operations, one of the four metal connectors can open up to the point of making a poor connection. Imagine a poor +12V connection between the power supply and the hard drive.
                        1 seems to be ok.

                        2 I'll check.

                        Would it give a 1701 error if the spindle was stuck?

                        Comment


                          #13
                          Mine gave that error.

                          Comment


                            #14
                            I'm giving up for awhile. Thanks for the help.

                            Comment


                              #15
                              Originally posted by fjk61011 View Post
                              Would it give a 1701 error if the spindle was stuck?
                              Refer to [here]. It is expected that if the drive's spindle does not 'come up to speed', the drive will never be 'ready', and therefore, step 5 will fail.

                              Comment

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