After me contronting LSI with their hardware compatibility list i get this answer:
These drives are on the compatibility list but they had a different firmware version as tested as compared to the version your drives have.
They were tested with drive firmware version 0265, your drives have firmware version 5DV10270.
Would it be wise to downgrade the firmware? I gues not.
We are aware that when using a RAID controller card, having a non-validated firmware version in the hard drives can cause unexpected behavior.
Intel only supports firmware upgrades on the drives. The support tools for our drives do not have the option to downgrade the SSD firmware.
In this case, we advise you to check with the RAID card manufacturer if they have plans for a future firmware with updated drive compatibility.
Also, it may be worth to confirm if the cables or drive back-plane is OK. This can be check by testing supported drives with the adapter.
I can confirm that all the slots on the backplane are working as I haven been testing for weeks now. So, it has to be a case of incompatability by firmware. This somewhat puts me in the 'screwed' area as both manufacturers will say their hardware works fine. Just the firmware is not compatable.
This has cost me way to much time allready and now I probably have to trow more money at it .
I'll contact LSI again.