Indeed, on the Tested Hardware and operating systems list doesn’t show any 1.5TB disk compatible. But also stated that:
Intel will only provide support for those adapters and peripherals under the specified system configuration (System BIOS and Firmware revisions) and client operating systems versions with which they were tested
I think that it should be fine, but is a risk that you need to take.
Yes, i have installed the drive, and so far it works fine on the system. I will be putting it through more tests once i have the 2 additional 1.5T that i ordered into the NAS. As you may know, as soon as you put 2 drives into the unit, it assumes a RAID 1 setup. I'll be redoing all the settings to RAID 5 once the drives are in.