After years of consolidation there are only four companies that manufacture hard drives, namely HGST, Seagate, Toshiba and Western Digital. Three of these companies also produce special drives for NAS-devices. HGST and Seagate both have one line of NAS-drives, while Western Digital has two.
HGST offers the Deskstar NAS, with a capacity between 3 and 6 TB and a rotation speed of 7200 rpm. There is a new revision of this, often referred to as ‘v2’ by web shops.
With older Seagate models you can also clearly see these are NAS-drives: they are called NAS HDD. The rotation speed of these drives is 5900 rpm (with the exception of the 8TB model, which is 7200 rpm) and they are available with a capacity between 1 and 8 TB. Some time ago however, Seagate decided to replace their entire line-up with new names and therefore NAS drives are called IronWolf. The IronWolf comes in two variants: the regular and the Pro, where the standard version is based on desktop drives and the Pro is based on server drives. The IronWolf is offered in capacities between 1 and 10 TB, while the IronWolf Pro has models ranging from 2 TB to 10 TB. Seagate offers a three year warranty for the regular drives and five for the Pro-models. In this test we tested both the current NAS-HDDs as well as the regular IronWolf-models.
Western Digital is the only manufacturer to currently have two lines with NAS hard drives, the Red and the Red Pro. The mainstream Red-line consists of 5400 rpm drives with a capacity between 1 and 8 TB. The Red Pro drives are meant for ‘prosumers’ and have a rotation speed of 7200 rpm. These are therefore supposed to be a lot faster, and the warranty is five years instead of three. Furthermore the company offers two 2.5 inch Red NAS-drives, with a capacity of 750 GB and 1 TB. However, these are more expensive and slower, meaning it is not very useful to use a 2.5 inch hard drive in a PC or NAS.