The initial plan was to create a RAID-0 array (striping for performance), re-install Debian, copy all data, and remove the older drives for noise and heat reasons.
Ths story is told here
Over the past few years space on my server would increase based on the deals found on sites like Slickdeals. After some time this lead to a mishmash of two PATAs and one SATA at 120Gb, 160Gb, and 200Gb respectively on my personal media server. Glad as I was to have all this space it started to become disk management issue since I wanted the bulk of the space consolidated for media. Filling up one drive would require me to move data to another with more space, causing organization and software issues (NFS would not single export multiple mounts).