Seagate 6TB 7200RPM 3.5" NAS SATA Hard Drive HDD - ST6000VN0021 6Gbps 128M Cache | eBay
Amazon.com: Seagate ST6000NM0115 3.5"-Inch HDD 6TB 7200 RPM 512e SATA 6Gb/s 256MB Cache Internal Hard Drive : Electronics
DELL / Seagate Enterprise ST6000NM0024 6TB 7200RPM 128MB Cache SATA III (6.0Gb/s) 3.5" Enterprise Hard Drive - 5 Year Warranty - Walmart.com
0F22801 HGST Hitachi Ultrastar 7K6000 6TB 7200RPM SAS 12Gbps 128MB Cache (TCG SED / 512e) 3.5-inch
Amazon.com: MaxDigitalData 6TB 7200RPM 128MB Cache SATA 6.0Gb/s 3.5inch Internal Hard Drive for NAS Network Storage (MD6000GSA12872NAS) - 3 Years Warranty : Electronics