left over restore file restoresymtable

[Aiza]

The man for restore says this.

Note that restore leaves a file restoresymtable in the root
directory to pass information between incremental restore passes.
This file should be removed when the last incremental has been restored.

What root directory is this talking about?

If system is booted from cd or dvd then this file can not be written to 
/root of the booted system.

Does this message really mean its written to /root of the just restored 
file system /