WD Red 4TB only shows as 2TB disks?

Hey everyone,

I wanted to build a NAS with OMV and some 4TB WD Red, but in my configuration manager they only show up as 2TB drives.

I rewrote the GPT tables on all of them, but still only 2TB

here is the output of fdisk -l

and this is shown in the GUI of OMV

I tried looking for solutions but couldn't really find any useful information that worked.

Has anyone of you an idea?

Greetings

Synthron

Edit: I'm trying to run it on an Intel Server with XEON E5335 and 8GB RAM

i think according to lspci it should be this one. HDDs are connected to a SAS-Backplane

04:08.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068 PCI-X Fusion-MPT SAS (rev 02)

nevermind... I'm just dumb... found the solution myself...

the LSI1068 is a SAS-1 controller (even though it shows as rev 02) and SAS-1 has a 2TB drive capacity limit...
guess I should dig more into the hardware specs for future builds...

thanks for helping me figuring out