Recovering BIOS code

Use the steps in this topic to recover BIOS code in the event it becomes damaged.

Context

If the BIOS code has become damaged, such as from a power failure during a flash update, you can recover the BIOS code using the boot block jumper and a BIOS flash diskette.
Note: The flash memory of your engine contains a protected area that cannot be overwritten. The recovery boot block is a section of code in this protected area that enables the engine to start up and read a flash diskette. The flash utility recovers the system BIOS code from the BIOS recovery files on the diskette.

Steps

  1. Obtain a BIOS flash diskette. You can obtain a BIOS flash diskette from one of the following sources:
    1. The ServerGuide™ Setup and Installation CD.
    2. The TotalStorage® 4146 support Web site at: www.ibm.com/storage/support/4146.
    3. Your IBM® service representative.
  2. Power off the engine.
  3. Disconnect all power cords and external cables.
  4. Remove the engine cover.
  5. Locate the flash boot recovery jumper block (J34) on the system board. This diagram shows the location of the flash boot recovery jumper on the system board.
    1
    Flash boot book recovery jumper (J34)
    2
    System board switch block (SW2)
  6. Move the jumper from pins 1 and 2 to pins 2 and 3 to enable the BIOS recovery mode.
  7. Insert the BIOS flash diskette into the diskette drive.
  8. Replace the engine cover, and reconnect all power cords.
  9. Power ON the engine. It begins POST.
  10. Select 1 - Update POST/BIOS from the menu that contains various flash update options.
  11. When prompted as to whether you want to save the current code to a diskette, type N.
  12. When prompted to choose a language, select a language (by entering a number from 0 to 7) and press Enter to accept your choice.
  13. Remove the BIOS flash diskette from the diskette drive.
  14. Power OFF the engine.
  15. Disconnect all power cords and external cables.
  16. Remove the engine cover.
  17. Remove the jumper from the Flash boot block recovery jumper block, or move it to pins 1 and 2 to return to normal startup mode.
  18. Reconnect all external cables and power cords, and turn on the peripheral devices.
  19. Replace the engine cover.
  20. Power ON the server. The system should start up normally.
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