We are on VNX5600, and have FC 400g (8 drives + 1 HS) on the DPE

We have expanded capacity on the VNX2 over time, we now want to expand FC with 2 more drives to max at 10, but we don't have any spare slots in the original DPE 0_0.

We do have empty slots (and unused disks can move) in other DAEs, and can have 11 free (all enclosure 0 on other BUSes)

But, I am confused as to FC disk placement, seems from #442856 that we CAN use 0_0 for FC, on VNX2, but that is not recommended for VNX1, and #428695 adds to my confusion about FC disk locations and mirror locations vs. what I have seen on some community postings.

So, my questions are...

Is it best practice on VNX2 to NOT put FAST Cache on 0_0?

Then, some options for expansion:

1) Leave (9) on DPE, add 2 more FC drives and mirror IN same enclosure?

   2_0_1 plus 2_0_2

2) Leave (9) on DPE, add 2 more FC drives and mirror BETWEEN different enclosures?

   2_0_1 plus 5_0_1

3) Move 1/2 of the FC drives OFF of 0_0 and set 0_0_x as HALF OF MIRROR and 2_0_x or 5_0_x as HALF OF MIRROR

   i.e.

   0_0_4 plus 2_0_1; 0_0_5 plus 5_0_1; etc.

4) Move ALL the FC drives OFF of 0_0 and spread/mirror them?

   i.e.

    same DAE?

      2_0_1 plus 2_0_2; 5_0_1 plus 5_0_2, etc.

    different DAE?

      2_0_1 plus 5_0_1; 2_0_2 plus 5_0_2, etc.

Thanks.