C6300 Disk partitioning...

We are contemplating purchasing one used PE C6300 chassis  with three C6320 compute blocks.  

1.  Can anyone describe how one allocates hard drives in the 24-HDD collection to each compute block?  Are there any limitations to what can be allocated to each block?

2.  If we create a RAID partition and allocate it to a specific compute block and that compute block subsequently dies, is it a straight-forward thing to import the RAID partition with another compute block?  Are there any issues to consider when doing this?

Thanks in advance.