Missing SCSI Device

NOTE: On some models with SCSI on the system board, slot number 0 or 1 designates the logical position for the SCSI controller. Diagnostics might instruct you to replace the SCSI adapter in slot 0, or 1, leading you to believe that the SCSI adapter is missing. In that situation, replace the system board (The SCSI controller is built into the board).

If a SCSI device is missing from the list, determine if the missing device is connected to the SCSI controller on the system board, or a SCSI adapter. Either the system board or the SCSI adapter might be defective. Continue with the following procedure.

  1.  Power-off the computer and disconnect any internal and external SCSI  devices from the computer (Except default drive 6, if installed).
  2.  If the device is connected to a SCSI adapter, install the external  terminator if no external SCSI devices are attached (some SCSI adapters have both  an internal and an external terminator).

    1.  Some system boards with SCSI have terminators built in and do not  require a terminator.
    2.  For more information, see 'Terminator Function'
  3.  Power-on the computer and run Automatic Configuration.  If  the SCSU adapter (or the SCSI controller on the system board) is not on the  Device List in Advanced Diagnostics, it is defective. If the SCSI adapter  (or the SCSI controller on the system board) is on the list, run the SCSI  adapter or SCSI controller advanced Diagnostic test.
  4.  If the SCSI adapter (or the SCSI controller on the system board) fails  the test, replace it. If it passes the test, a different adapter or device might  be causing the problem, if this is the case, continue with the next step.
  5.  Disconnect SCSI default drive 6, then re-run Advanced Diagnostics. If the  SCSI adapter or the system board fails, replace the FRU. If the problem is not  found, continue with the next step.
  6.  Reconnect all the devices, then put all terminators back in the same  positions they were before service.
  7.  Use the below following table to find/locate the error/problem.

SCSI - Errorcode format

       A A A B C D E  F F F
       ----+ | | | |  +----
           | | | | |  Error code   (see table)
           | | | | Unit capacity   (always 0)
           | | | Defective Adapter (primary = 0)
           | | Logical Unit number (Adapter = 0)
           | SCSI - ID of Unit     (Adapter = 7)
 Unit-type Codes:
    104   IBM PS/2 SCSI-2 Adapter/2
    209   DASD-Unit type 0 (not 512 bytes / sector not replaceable)
    210   Hard Disk (512 byte / sector)
    211   Unit with sequ. access (Tape)
    212   Printer
    213   Processor
    214   WORM-Unit (Write Once Read Many)
    215   CD-ROM
    216   Scanner
    217   Optical Storage

Error code Example  for EC 1047000 107

 104  Unit is IMB PS/2 SCSI-2 Adapter/A
 7000 SCSI - ID is 7 .... Primary Adapter
 107  Error Code 107

SCSI - Error Code table

Error Code:    FRU/Action.
107 1. SCSI chain not correct terminated
  2. Cable not correct installed
  3. defective SCSI cable
  4. defective SCSI terminator
  5. defective SCSI device
  6. defective SCSI-2 Adapter/A
220 1. Configuration Error
  2. SCSI - ROM system-memory conflict
  3. SCSI-2 Adapter/A
221 1. No SCSI Device found
  2. SCSI cable defect
  3. SCSI - Device Power missing
  4. SCSI - termination
  6. SCSI-2 Adapter/A
402 1. SCSI Device Error
XXX 1. Unknown SCSI Device

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