I've experienced the same problem as edalS.
Eternus DX80 S2, two broken disks ST3450856SS:
We asked from seller to deliver us two disks ST3450856SS.
They sent us two ST36000857SS disks, with explanation that it will probably do the job and that the disks are just with larger capacity but they will work normaly and act as the smallest disk in the RAID i.e. 450GB.
It was not so:
In the meantime, while waiting for apropriate disks from seller I've placed one new disk in storage, that accidentally came into my hands yesterday, that is unused and correct and is completely the same type as broken ST3450856SS, and storage message is again the same - Not supported:
From this point I assume that firmware is the problem...
Has anyone had this kind of problem? Is there any option of updating disk to appropriate firmware? I've talked with the seller and we agreed that an adequate disk for replacement would probably be the ST3450857SS, but what about firmware version, should i ask for disks with some firmware version specifically just to be sure disks will work in storage?