User`s guide

2.7 Fail-Safe Loader

The fail-safe loader (FSL) allows you to attempt to recover when one of the

following is the cause of a problem getting to the console program under normal

power-up:

• A power failure or accidental power down during a ﬁrmware upgrade

• A checksum failure or ﬂash ROM header error while the SROM code is trying

to load the SRM/ARC console ﬁrmware

Note

The fail-safe loader should be used only when a failure at power-up

prohibits you from getting to the console program. You cannot boot an

operating system from the fail-safe loader.

If a checksum error is detected when the SRM/ARC console is loading at

power-up (error beep code 1-1-4), you need to activate the fail-safe loader

and reinstall the ﬁrmware.

2.7.1 Fail-Safe Loader Functions

From the FSL program, you can update or load new console ﬁrmware.

2.7.2 Activating the Fail-Safe Loader

To activate the FSL:

1. Install the jumper at bank 7 of the J1 jumper on the CPU daughter board

(Figure 2–6). The jumper is normally installed in the standard boot setting

(bank 0).

2. Install the console ﬁrmware ﬂoppy diskette and turn on the system.

3. Reinstall the console ﬁrmware from a ﬁrmware diskette.

4. When you have ﬁnished, power down and return the J1 jumper to the

standard boot setting (bank 0).

Power-Up Diagnostics and Display 2–17