Well, after five years of service my DS1515+ succumbed to the Intel C2000 series CPU bug and died.
As I like to silver lining the crap out of any cloud coming my way, I upgraded to an eight bay DS1819+ to give me more room to grow into, and more importantly have a working NAS again.
This left me with this DS1515+ as a paperweight and that was not going to work for me. So I ordered up some 100 ohm resistors and busted out the trusty soldering iron to implement this fix https://mariushosting.com/synology-how-to-fix-c2000-flaw-with-100-ohm-resistor/ .
A quick bit of cautious soldering later and the DS1515+ was alive again, populated with 10TB drives, setup with BTRFS (with snapshots) and now suitable to be a data replication target for the main NAS.
Every cloud, silver lining. 🙂
Infonomicon 