Settings on Dvd Writers (Disconnect and Region)

[maxxxpain]

Hi i was just looking at the settings on my pioneer 106.

The disconnect setting was enabled by default.
But when i right click and click on whats this? It tells me this setting is for scsi devices only.

Should this setting be enabled on an ide device and what does it actually do?

Also a question about the region. The drive currently has no region set. Is it better to keep it this way or will this cause problems when trying to rip dvd films. I noticed dvd decryptor brings up a message asking for region to be set but smart ripper does not . Would you say smart ripper is a better program at all?