SafeStor\FT, Appendix D - Configuration Changes

Appendix D
Configuration Changes

Reason for Change
Changing the Configuration

Reason for Change

. To change the number of SCSI drives assigned to each SCSI bus

. To change the type of drive (half-height or third-height)

Changing the Configuration

CAUTION!

Do not attempt to change the SafeStor\FT configuration while the unit is in operation.

Note: Detailed instructions for performing many of the steps listed below are included in Chapter 4 - Component Installation.

1. Determine the desired SCSI bus configuration. Remember the following guidelines:

The SafeStor\FT backplane consists of six groups of two disk drive connectors each. Adjacent groups may be joined onto the same SCSI bus by inserting a shunt board between the groups.
Each SCSI bus must be terminated.
Each of the six groups will accommodate two third-height or one half-height SCSI disk drive.

2. Determine what changes to the existing configuration are required. Examine the current configuration specified on the configuration sheet attached to the rear of the front panel. If the configuration sheet has not been maintained, the configuration may be determined by examining the SCSI bus LEDs on the backplane. Refer to Figure D-1 to locate the LEDs, and Table D - 1 for LED interpretation.


                     Table D-1
              SCSI Bus LED Definitions

      Amber           A Terminator board is installed in
                      the shunt slot.

      Green           A shunt board is installed in the
                      shunt slot (joining SCSI Bus
                      segments).

    * Green & Amber   A terminator board is installed
    backward
                      in the shunt slot.

      None            The shunt slot is empty. 


   *  This is an error condition that must be resolved
   before continuing
       with the system configuration. Refer to Chapter 4 -
       Component
       Installation for shunt and terminator board
       installation instructions.
       Do not attempt to remove or install shunt or
       terminator boards
       while the SafeStor\FT is in operation.

3. Verify that a sufficient quantity of shunt boards and terminator boards are available to achieve the desired configuration. Acquire any needed boards from Cubix Corporation before proceeding with the configuration.

4. Verify that sufficient SCSI cables and connectors are available to achieve the desired configuration. SCSI connector kits may be acquired from Cubix Corporation.

5. Power down the SafeStor\FT and disconnect the external cables from the rear of the SafeStor\FT. Warning! Do not continue with this procedure until both power cords are removed.

6. Reconfigure the backplane as required.

7. Modify the cable configuration as necessary.

8. Reassemble the unit, without replacing the front panel.

9. Apply power to the SafeStor\FT.

10. Verify the new bus configuration. Update the configuration sheet on the rear of the front panel to reflect the intended configuration changes. Compare the resulting sheet to the SCSI bus LEDs (refer to Figure D-1 and Table D - 1). If the LEDs do not match the configuration sheet, return to step 5.

11. Replace the front panel.

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Reason for Change

Changing the Configuration