DL380 Gen8: mount drives internally?

[DDIT]

Hi,

So I have 2 x identical DL380 Gen8s. Each DL has 16 SFF drives

8 x 300GB SAS (connected to P420i)
8 x 1200GB SATA (connected to P420 card)

I want to reconfigre these servers, so one has as much capacity as possible, and the other has whatever drives are leftover.

I tried setting up 2 x 300GB as the Windows OS (RAID 1), then realised I cannot create a RAID array with the remaining 14 drives as the array cannot span controllers. I cannot change the controllers to JBOD as I would like some redundancy on the OS disk.

I'm wondering if there is a way to mount a pair of SFF's (or any 3rd party drives) internally, to allow use of all 16 SFF's?

Thanks in advance.

[Torsten.]

see

https://community.hpe.com/t5/ProLiant-Servers-ML-DL-SL/HP-DL380P-Gen8-SAS-Expander/td-p/7004914#.X_3fyxZCdPY