Synology DS1515+ & DX513 Expansion Unit @ techPowerUp
 

Synology's DS1515+ mostly addresses SMB environments since it can combine with two DX513 expansion units to support up to 15 HDDs. Today, we have the opportunity to evaluate a DS1515+ along with one of Synology's expansion units, which make for a great opportunity to figure out how this combination performs in various usage scenarios.

http://www.techpowerup.com/reviews/Synology/DS1515Plus/