Back in time, I configured a ZFS on HP NL 40 Microserver.
Therefore I used an LSI controller and a sharkoon with 6 bays (please see posts from then).
Now I installed Synology OS on HP NL 40 and removed the LSI to use the slot for dual NIC card. It is all working great, I have two SSD's in RAID0 for my fast vm's, SATA RAID5 for data and slower vm's.
Now I still have this sharkoon cable which I could attach to my sata slot on motherboard and attach 3 extra SSD's this way.
My question: I wonder why the LSI was needed to attach the sharkoon with 6 SSD's. I could have attached it via the sata slot on motherboard? Or would performance degrade that much? Then I might stick to just 2 sata's in RAID0 (1 ssd connected to sata on motherboard, other to external esata).