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Issue with Failed Seagate Cheetah SAS Drive


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Hey guys, just trying to find a completely solid yes or no on this question, not just guesses/maybes.  I know that getting into the terminal of a Barracuda drive is possible and actually relatively easy, as I have done it.  However, is it possible to also get into the terminal using the same methods for a Cheetah SAS drive (ST3450856SS)?  I have tried using the same adapter that I used for my SATA drive, but I get no response when I open putty, not even a command prompt, just black screen.  Have done a loopback test so I know the adapter is working fine.  Is the TX-RX pinout different on the rear of an SAS drive than on a SATA drive?  Different baud rates?  Or something else altogether?  I have also seen posts about having to jump pins on the PCB in order to get terminal to work.  Could this have something to do with it?

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