Improved power interruption tolerance by developing read-only version of Sun Solaris 2.9 UNIX O/S. Utilized iterative approach, Solaris documentation and news groups to modify *.rc files and add read-only setup files until system could consistently be booted in a known required configuration.
Challenges:
No clear documentation on which configuration files needed to be replaced.
Iteratively loading UNX time consuming so employed multiple systems so analysis and debug could occur while previous attempt loaded.