Using Solaris, when do you use init s instead of init 0 with boot -s? Is there a difference?

Question

Often when I'm applying patches to a Solaris box, I want to do it from single user mode. Is there any difference in getting to single user mode by using init -s instead of init 0 and then boot -s? Init s is certainly faster. What are the pros and cons of using one method over the other?

Answer 1

AFAIK, there's no real difference between the two, other than the init 0 method being slower (since you go through 2 init stages, as opposed to one). For patching purposes, either would work just fine.

The biggest pro that I can see for going to init 0 first would be if you were needing to set the auto-boot parameter, for doing a reset-all and probe-scsi, or something like that.