Parent Job and Child Job

Hello All Experts,

I need to know the below things. Please help me understand.

1:- Difference between parent and child job.

2:- Command to stop/restart a particular deamon in Solaris.

3:- How to configure Scratch pool?

4:- How to configure tape_alert in library?

5:- I am getting an error message "Fault Code 3200 Hard Shuttle Jammed" in one of my tape library "HP MSL 6060 Tape Library"

Many Thanks