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Impartial price comparison

WD Blue WD40EZRZ 64MB 4TB vs. WD Red WD40EFRX 64MB 4TB + 9

WD Blue WD40EZRZ 64MB 4TB

WD Blue WD40EZRZ 64MB 4TB

3.7

£78.50

£79.00 Incl. delivery
WD Red WD40EFRX 64MB 4TB

WD Red WD40EFRX 64MB 4TB

4

£93.29

£96.99 Incl. delivery
WD Red WD30EFRX 64MB 3TB

WD Red WD30EFRX 64MB 3TB

4.3

£65.00

Free delivery
WD Red Pro WD4003FFBX 256MB 4TB

WD Red Pro WD4003FFBX 256MB 4TB

2.8

£113.99

Free delivery
Seagate Firecuda ST2000LX001 128MB 2TB

Seagate Firecuda ST2000LX001 128MB 2TB

4

£89.70

£96.73 Incl. delivery
Seagate Exos X16 ST16000NM001G 256MB 16TB

Seagate Exos X16 ST16000NM001G 256MB 16TB

£359.99

£365.47 Incl. delivery
WD Blue WD10EZEX 64MB 1TB

WD Blue WD10EZEX 64MB 1TB

4

£30.99

£34.47 Incl. delivery
WD Red WD60EFRX 64MB 6TB

WD Red WD60EFRX 64MB 6TB

4.2

£163.00

£168.45 Incl. delivery
Noise level
25 - 28 dB
23 - 27 dB
23 - 24 dB
29 - 36 dB
22 - 26 dB
23 - 26 dB
28 - 34 dB
22 - 27 dB
29 - 30 dB
23 - 30 dB
25 - 28 dB
Connection
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
S-ATA
Interface
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
S-ATA 6Gb/s
Dimensions (WxHxD)
Depth
147 mm
147 mm
147 mm
147 mm
100.35 mm
146.99 mm
147 mm
146.99 mm
147 mm
146.99 mm
147 mm
Height
26.1 mm
26.1 mm
26.1 mm
26.1 mm
7 mm
26.11 mm
26.1 mm
20.17 mm
25.4 mm
26.11 mm
26.1 mm
Width
101.6 mm
101.6 mm
101.6 mm
101.6 mm
69.85 mm
101.85 mm
101.8 mm
101.6 mm
101.6 mm
101.6 mm
101.6 mm
Form factor
3.5 inches
3.5 inches
3.5 inches
3.5 inches
2.5 inches
3.5 inches
3.5 inches
3.5 inches
3.5 inches
3.5 inches
3.5 inches
Features
NAS-optimized
ERC (Error Recovery Control), NAS-optimized
ERC (Error Recovery Control), NAS-optimized
NAS-optimized
ERC (Error Recovery Control), NAS-optimized
NAS-optimized
NAS-optimized
ERC (Error Recovery Control), NAS-optimized
Cache size
64 MB
64 MB
64 MB
256 MB
128 MB
64 MB
256 MB
256 MB
64 MB
128 MB
64 MB
Hybrid disk (SSHD)
No
No
No
No
Yes
No
No
No
No
No
No
Recording technology
SMR
CMR
CMR
CMR
CMR
CMR
SMR
SMR
CMR
Release year
2015
2013
2012
2014
2016
2016
2019
2017
2012
2014
2014
Operational Power Consumption (min-max)
3.4 - 5.3 W
3.3 - 4.5 W
2.7 - 4.1 W
3.7 - 7.2 W
0.5 - 1.8 W
3.95 - 4.8 W
6.3 - 10 W
0.25 - 3.7 W
6.1 - 6.8 W
7.5 W
3.4 - 5.3 W
Power consumption (standby)
0.4 W
0.4 W
0.4 W
0.4 W
0.13 W
0.5 W
5 W
0.25 W
1.2 W
0.75 W
0.4 W
Advanced Format (AF)
512e
4Kn
512e
512e
512e
4Kn
512e
Internal transfer rate
150 MB/s
150 MB/s
147 MB/s
217 MB/s
140 MB/s
263.38 MB/s
261 MB/s
190 MB/s
150 MB/s
292 MB/s
175 MB/s
Mean Time Between Failure (MTBF)
1000000 h
1000000 h
1000000 h
1000000 h
2500000 h
1000000 h
1000000 h
Number of disks (platters)
4 ​
4 ​
3 ​
2 ​
3 ​
9 ​
2 ​
1 ​
4 ​
5 ​
Rotational speed
5400 RPM
5400 RPM
5400 RPM
7200 RPM
5400 RPM
5900 RPM
7200 RPM
5400 RPM
7200 RPM
5900 RPM
5400 RPM
Storage capacity
4 TB
4 TB
3 TB
4 TB
2 TB
4 TB
16 TB
4 TB
1 TB
5 TB
6 TB
Price/TB
19.75 £/TB
23.25 £/TB
21.67 £/TB
28.5 £/TB
45 £/TB
22.25 £/TB
22.5 £/TB
18.25 £/TB
31 £/TB
16.2 £/TB
27.17 £/TB
Unrecoverable Read Error (URE)
1 per 10^14
1 per 10^14
1 per 10^14
1 per 10^14
1 per 10^14
1 per 10^14
1 per 10^15
1 per 10^14
1 per 10^14
1 per 10^14
1 per 10^14