GeorgeS

After reading all the online information I am still a little unclear about the how file and folder duplications works.
 
If I have several discs in the pool, say 10.  Now if I set file duplication to 2 x and I set a specific folder (with many subfolders) to 2x duplication too.  Is the result as follows;
All files NOT in the folder are duplicated across any of the 10 pool discs. All files IN the folder AND subfolders are kept on 1 disc and duplicated on another disc. When the size of the duplicated folder exceeds the size of the disc in the pool that it is stored on, what happens?  A) I get a message to say it is full or B ) does it expand the folder over 2 discs (4 discs with duplicate). My objective is to keep some folders together on one disc, whilst others I don’t mind how they are duplicated across the rest of the pool.

Just a hypothetical question as this has not yet happened but I need to understand this so that I can set up correctly.
 
I have a windows 8.1 desktop with 2 x 2TB and 2 x 4TB linked to the SATA connectors on my desktop motherboard and 8 x 2 TB discs connected by eSATA through port multiplier connected to my desktop eSATA connector.  So that’s 12 discs in total and I have file duplication set.
 
Now if my desktop motherboard and/or operating system completely fail, can I just buy a new PC and then plug by pool discs into any SATA connectors available on it, install Stablebit on the PC and the pool will be instantly recognised and usable?
 
What I am asking I guess is whether it matters how the pool discs are reconnected to the new motherboard, i.e. BIOS settings and IRQ info an all that or is this all transparent to stable bit?
 
Thank in advance for any advice