enablecomponent(1M) removes a component from the platform, domain or ASR blacklist, making it eligible for booting.
The blacklist is an internal file that lists components POST cannot use at boot time. POST reads the blacklist file(s) before preparing the system for booting, and passes along to OpenBoot PROM a list of only those components that have been successfully tested; those on the blacklist are excluded. SMS supports three blacklists, one for domain boards and one for platform boards; and the internal ASR blacklist.
The ASR blacklist is an internal file created by esmd when it powers off components due to environmental conditions. The ASR blacklist is also used by the power libraries and SMS commands to prevent turning on a bad component.
enablecomponent used without any option will edit the platform blacklist.
Use showcomponent(1M) to display whether a particular component is currently blacklisted.
For more information on the use and editing of platform and domain blacklists refer to Chapter 7 in the System Management Services (SMS) 1.2 Administrator Guide for the Sun Fire 15K/12K Systems