4 TB NAS and Nearline Drives Face-Off: The Contenders - WD Red Pro Review: 4 TB Drives for NAS Systems Benchmarked
![Seagate IronWolf Pro 4TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6GB/S 7200 RPM 128MB Cache for Raid Network Attached Storage, Data Recovery Rescue Service (ST4000NE0025) : Electronics Seagate IronWolf Pro 4TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6GB/S 7200 RPM 128MB Cache for Raid Network Attached Storage, Data Recovery Rescue Service (ST4000NE0025) : Electronics](https://m.media-amazon.com/images/I/519Dy3ScehL._AC_SY355_.jpg)
Seagate IronWolf Pro 4TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6GB/S 7200 RPM 128MB Cache for Raid Network Attached Storage, Data Recovery Rescue Service (ST4000NE0025) : Electronics
![Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics](https://m.media-amazon.com/images/I/71n++WwxSnL._AC_SX466_.jpg)
Amazon.com: WD Red Pro 4TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD4001FFSX : Electronics
![Specifications and Feature Set Comparison - WD Red Pro 6 TB Review - High Performance NAS HDD Gets a Capacity Bump Specifications and Feature Set Comparison - WD Red Pro 6 TB Review - High Performance NAS HDD Gets a Capacity Bump](http://images.anandtech.com/reviews/nas/hdds/6TB/hdtunepro/info-wd-red-pro.png)