Dump questions

[Aiza]

1. Using the -L flag to create a snapshot of the
live running file system.

Does this mean that a complete copy of the file
system is written to .snap directory?

So if the running file system is more than 50%
full there will not be enough free space available
to hold the duplicate image?

Can dump recognize this situation and issue
an error message?

Is this the limiting factor that forces a user
to use (single user mode) for running dump?


2. What is the worse that will happen if dump is
run on live file system with out the -L flag?

Can dump recognize this situation and issue
an error message?


3. Can dump be told to only dump a particular
directory tree? IE /var/log  or /usr/port?