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  1. Newsgroups: comp.sys.att
  2. Path: sparky!uunet!gatech!asuvax!ncar!uchinews!machine!gagme!gagme!greg
  3. From: greg@serveme.chi.il.us (Gregory Gulik)
  4. Subject: 3B2 SCSI cabling...
  5. Message-ID: <1993Jan5.213613.18484@serveme.chi.il.us>
  6. Organization: Gagme Public Access Unix, Chicago, Illinois
  7. Date: Tue, 5 Jan 1993 21:36:13 GMT
  8. Lines: 53
  9.  
  10.  
  11. I'm having a bit of a problem getting SCSI to work on my 3B2/400.
  12.  
  13. This is what I have so far:
  14.  
  15.     - SCSI card in slot 1 set to SCSI device ID 0
  16.     - CDC Wren IV (?) 300 MB disk set to SCSI device ID 1
  17.     - The disk is in my XM with the ribbon cable connected to
  18.       the right-hand connector of the SCSI card.
  19.     - The disk has its own terminators
  20.     - The left-hand connector has a short cable with a
  21.       Centronics SCSI terminator.
  22.  
  23. A picture is worth a thousand words:
  24.  
  25.  
  26.         +-------------__________-+
  27.         | ##########  ########## |   <-- SCSI card in slot 1 of 3B2/400
  28.         +-|        |--|        |-+
  29.           |        |  |        |
  30.           |        |  |        |                ____________________
  31.           |        |  |        |               |                    |
  32.           |        |  |        |               |                    |
  33.           |        |   \        \              |  SCSI Disk         |
  34.           |        |    \        \             |____________________|
  35.           |        |     \        \__________ |                      |
  36.          |==========|     \__________________]|______________________|
  37.         |            |
  38.         |____________|
  39.           ^
  40.           |
  41.     SCSI Terminator
  42.  
  43. Ok, I installed all that, rebooted, the machine of course didn't
  44. recognize the card.  I installed the SCSI host utilities and the
  45. disk utilities.
  46.  
  47. I rebooted and it found the SCSI card, but failed diagnostics.
  48. I ran 'dgmon' by hand, and it failed test 17, which is the
  49. RESET test.  It complained that it might be a cabling or
  50. termination problem.
  51.  
  52. I checked my cabling, and it looks fine.
  53.  
  54. Any ideas?
  55.  
  56. -greg
  57.  
  58. -- 
  59. Gregory A. Gulik                                 Call Gagme, a public access
  60.        greg@serveme.chi.il.us                    UNIX system at 312-282-8606
  61.    ||  gulik@rtsg.mot.com                        For information, drop a note
  62.                                                  to info@gagme.chi.il.us
  63.