It is necessary to have UEFI boot option in the BIOS to use Hard Disk Drives with 2TB or more. Your board is old and this feature is not available.
Unified Extensible Firmware Interface
https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface Unified Extensible Firmware Interface - Wikipedia, the free encyclopedia
thank you for reply. I want to boot the OS DSM from Synology by using XPEnoboot from usb-stick. Actually i do this and i have two 2.0TB WD RED for data.
Someone wrote to me that i should not encounter any problems. This guy is running two 3.0TB WD RED disks at his M510MO at the moment. And there will not be any limitation regarding size after the 2TiB 32-bit sector addressing.
So do you think that i will have any problems with 6.0TB disks.
Than you for reply.
I bought two 6TB HDD and installed them. The BIOS saw them correctly and so i booted the system from USB-Stick. The DSM saw the the two HDDs too. 10,82 TB together. 3,2 TB are used now.
I will inform you.