I had to reboot my router and the router gave my NAS a new IP-adress. That caused my media db on R150B not to recognize my NAS. I deleted the db and connected my R150B to the new IP-adress.
So I did a new scan on the R150B of my music (275 000 tracks) on my NAS and was prepared to have to wait 96 hours for the scan to end as I did last time.
To my surprise the complete scan this time took “only” 31 hours. So some trimming has been done.
I will later add a couple of new CD:s and do a rescan to see if the rescan will also take 31 hours.