Continuing my post (maybe to help other unexperienced ones like me).
is fed with my old 4x1Tb Samsung Momentus HD's and connected to my network. After booting the NAS he is first downloading and installing the latest DSM. Meanwhile the NAS keeps beeping (later i see that 2 hd' are marked as risky).
After following the web interface i can enter my old credentials and after a while i can reach the NAS and YES everything is still there and reachable. First thing i did was copying all the data to another NAS because of the risky drives. I did this with Explorer but isn't there a solution to copy directly from 1 NAS to another?
So far great tx for your advice.
Next problem, replacing the drives. I bought 4 new Seagate barracuda 1Tb hd's. Can i replace them 1 by one (not at once i understand) starting with 1 of the risky hd?
And how long before the next one so the RAID 5 can be rebuild?
Tx in advance