Ah - hello
Well I use Logic professionally on a cMP - that's a different setup entirely.... BUT...
I Also have a portable system on my MBP - Quad 2.4 late 2011 version.
I use 2 x drives with that, both have large samples / Libraries and record
Audio.
One is a Lacie Rugged TB/USB3.0 drive and I have stuck a 1TB HGST 7200rpm drive
in it - the original 5400 was "OK" but not quite fast enough.
- It works well as a single drive for me, don't need Raid IMHO unless you want
to stream a very large orchestral library .... is that the case ??
Second drive is a USB3.0 enclosure with another 1TB HGST 7200rpm inside.
This I have to use with my Belkin TB Dock - no native USB3.0 on my MBP !
My system drive in the MBP is a 750gb EVO SSD, this combined with the Lacie and the
7200rpm gives me all that I need.
What are your specific concerns with Logic ? would help to know the details
Marty.