Metric Halo 2882 operating guide - Manual (Page 102)

Mobile I/O User’s Guide – Appendicies
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Actually, the primary boot firmware is much smarter than that. The box is
completely functional on the primary boot, but all of the more advanced fea-
tures of the box are enabled by the second boot. The firmware revision of the
primary boot is 1.1.0.
As soon as the primary boot image has booted, it checks the secondary boot
image, and if the secondary boot image is installed and not corrupted in any
way, the system immediately boots the secondary image. If the secondary
image is corrupted or if you have held down the front-panel Mute button
during the initial boot process, the Mobile I/O will not boot the secondary
image and will stay in “Safety Boot Mode”. This is a mechanism you can use
if you install firmware that has problems and you need to back up or install a
newer image.
The safe boot mechanism allows you to back out of a firmware update if you
find that the new firmware has some problem that was not present in a pre-
vious version of the firmware. Metric Halo support may ask you to do this
during troubleshooting if you encounter any problems.
In the future, Metric Halo may change the methods or tools used to find,
download, and accomplish firmware updates. If the tools change, they will
be accompanied by an updated version of this Appendix.