The 10TB WD Red (WD100EFAX) Hard Disk Drive Review

Page 4 : Usable Capacity, Platter Profile, Operating Temperature

Usable Capacity

The 10TB WD Red (WD100EFAX) NAS drive has an official formatted capacity of 10 terabytes. We checked that out by formatting it in NTFS using Microsoft Windows 7.

The actual formatted capacity was 10,000,695,029,760 bytes, which is about 695 MB higher than the official storage capacity. With about 494 MB allocated to the NTFS file system, the actual usable capacity was slightly above 10 TB.

 

Platter Profile

The platter profile of the 10TB WD Red (WD100EFAX) NAS drive was pretty good. There appeared to be some use of replacement sectors, but nothing particularly significant.

We also compared its platter profile to that of the 6TB WD Red, which was the last WD Red drive we reviewed. We can see right away that the 10TB WD Red uses higher density platters, which gave it a very high throughput.

In fact, the outermost tracks of the 6TB WD Red only equalised the 10TB WD Red at the 6.5 TB point. Even at its slowest tracks, the 10TB WD Red was as fast as the 6TB WD Red at its 5 GB point.

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Maximum Surface Temperature

We monitored the surface temperature of seven hard disk drives during their benchmarks. The following chart shows their operating temperature range, from idle to maximum load. Please note that instead of giving you the absolute numbers, we are showing the temperature delta, which is the difference between the actual temperature and the ambient room temperature.

Despite packing 2 additional platters than the 6TB WD Black, the 10TB WD Red drive was significantly cooler at full load. It ran a little warmer than the 8TB WD Gold – another helium-filled drive, but was cooler at idle.

This reduced thermal output (and power consumption) is a key advantage of helium-filled hard disk drives like the 10TB WD Red drive. When used in large NAS systems with up to 8 drives running non-stop, the lower energy costs of running them, and keeping them cool, will be very significant.

Next Page > Transfer Rate Range, WinBench Results

 

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