2nd hard disk for MySQL/PostgreSQL database under RedHat 7.2

[Ali Taalebi]

I am running RedHat 7.2 on a Compaq DeskPro system which
currently has a 4 GB hard disk.
I would like to add a second hard disk, primarily to save some
database tables under MySQL or PostgreSQL. 

Your hints and insights on the following issues will be very much
appreciated:

1. Has anyone had any experience regarding Maxtor 40GB, 7200rpm hard disks?

2. Is there any hard disk size limit under RedHat 7.2?

3. Are there any important issues that I should consider before physically
installing the 2nd hard disk?

4. Any tricky issues regarding formating such second hard disk?

Many thanks in advance.

>>Ali