Topic: fault-management
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Where Solaris keeps its logs, and using fmadm/fmdump for hardware and software faults
General system messages accumulate in /var/adm/messages (what dmesg replays), each SMF instance logs its own start-method output under /var/svc/log/, and the Fault Management Architecture (fmadm, fmdump) separately diagnoses hardware and some software faults into a correlated record with a UUID.
Machine-readable: JSON