Service Guide

Recovering the BIOS

If the BIOS becomes corrupted (for example, from a power failure during a flash update), you can recover the BIOS using the recovery boot block and a BIOS flash diskette.

Note:

You can download a BIOS flash diskette from www.ibm.com/storage/support/nas.

The flash memory of the IBM IP Storage contains a protected area that cannot be overwritten. The recovery boot block is a section of code in this protected area that enables the appliance to start up and to read a flash diskette. The flash utility recovers the system BIOS from the BIOS recovery files on the diskette.

To recover the BIOS:

1. Switch OFF the appliance and peripheral devices, and disconnect all external cables and power cords; then, remove the cover.
2. Locate the boot block jumper (J37) on the system board.
3. Place a jumper on pins 1 and 2 to enable BIOS recovery mode.
4. Insert the BIOS flash diskette into the diskette drive.
5. Switch ON the appliance.

   The Recovery Boot panel appears. A progress report, Loading data from diskette xx%, is displayed. When programming is underway, a further progress report, Programming block n of 7yy%, is displayed. When recovery is complete, the following message is displayed:

   Recovery complete, remove the diskette and return boot block switch to the off position before rebooting.

6. Remove the flash diskette from the diskette drive.
7. Switch OFF the appliance.
8. Remove the jumper on the boot-block jumper block, or move the jumper to pins 2 and 3 to return to normal startup mode.
9. Switch ON the appliance. The system should start up normally.