are the drives I'm using in my DS1512+. I've had no problems with them and they're very quiet. Originally, I was going to use four in a DS412+ in a RAID 5 for 8.2 TB total, but because they're not enterprise grade (costing 2.5 times as much), I went ahead and got the DS1512+ and used five in a RAID 6 for the same 8.2 TB total with two disk redundancy.
DS 1512+ w/3GB, 5 x 3TB Seagate ST3000DM001 8.2TB RAID 6, half files/half Time Machine.
Icy Dock MB559U3S-1SB enclosure w/4TB Hitachi UltraStar via USB 3 for files backup
UVERSE to AirPort Extreme + 2 AirPort Express w/speakers. TRENDnet TV-IP312WN camera
CyberPower CP1500PFCLCD Sine Wave UPS
DSM 4.1-2661 w/SSH + SFTP, VPN Server, Syslog Server, Media Server, Mail Server, Mail Station,
Audio Station, Surveillance Station, Photo Station, Web Station - DS Apps on iPad & iPod Touch.