Apple Xserve Diagnostics - Manual (Page 18)

18 Chapter 3 Loading AXD Tools
If the two rows of lights on the front panel blink once and the Xserve resumes its
startup sequence, an firmware password is enabled. You’ll need to disable the
password.
For information about disabling the firmware password, see the next section,
“Disabling the Firmware Password.”
4 When you release the system identifier button, the rightmost light in the bottom row
should turn on.
5 Press the system identifier button again. The lights in the bottom row should now be
moving right to left.
6 Press the button repeatedly until the leftmost light in the bottom row turns on.
7 When the leftmost light is on, press and hold the system identifier button until all the
lights in the top row are on. Release the system identifier button.
When you release the button, the Xserve loads the AXD EFI tools NetBoot disk image.
After you’ve run AXD EFI tools, the Xserve starts up using its original startup volume
when you restart.
Both rows of lights blink once.
Disable the firmware password.
Bottom, rightmost light comes on.
Bottom row of lights blink right to left.
Bottom, leftmost light comes on.
Top row of lights come on.