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Product Comparison

Technical Specifications

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Feature

Brand: Western Digital|SKU: 0F38459

WD Ultrastar DC HC550 WUH721818ALE6L4 - hard drive - 18 TB - SATA 6Gb/s

£391.18

Stock: 0

Brand: Western Digital|SKU: 0B47743

WD Ultrastar DC HC555 - Hard drive - Data Centre - 14 TB - internal - 3.5" - SAS 12Gb/s - 7200 rpm - buffer: 512 MB

£341.81

Stock: 1

Brand: Western Digital|SKU: WD6004FRYZ

WD Gold WD6004FRYZ - hard drive - Enterprise - 6 TB - SATA 6Gb/s

£178.68

Stock: 7

Brand: Western Digital|SKU: 0F48155

WD Ultrastar DC HC570 - Hard drive - 22 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 512 MB - for Intel Next Unit of Computing 13 Extreme Kit - NUC13RNGi7

£468.56

Stock: 2

Brand: Western Digital|SKU: WD6005FFBX? 4 PACK

WD Red Pro WD6005FFBX - hard drive - 6 TB - SATA 6Gb/s

£707.50

Stock: 6

General

Buffer Size

512 MB

—

256 MB

—

256 MB

Bytes per Sector

—

512

—

Capacity

18 TB

—

6 TB

—

6 TB

Depth

147 mm

—

147 mm

—

147 mm

Device Type

Hard drive - internal

—

Hard drive - internal

—

Hard drive - internal

Features

Energy-Assisted Magnetic Recording (EAMR), Media Cache Plus, Rotational Vibration Safeguard (RVS), Triple State Actuator (TSA), Two-Dimensional Magnetic Recording (TDMR), Conventional magnetic recording (CMR), HelioSeal

—

Enterprise Class Reliability, HelioSeal, advanced format 512e, vibration sensor, ArmorCache Technology

—

24x7 continuous operation, Advanced Format technology, Conventional magnetic recording (CMR), Rotational Vibration (RV) sensor, Native Command Queuing (NCQ), OptiNAND technology, Multi-axis shock sensor, Dynamic fly height technology, NASware 3.0 technology, Error Recovery Control, 3D Active Balance Plus

Form Factor

3.5"

—

3.5"

—

3.5"

Height

26.1 mm

—

26.1 mm

—

26.1 mm

Interface

SATA 6Gb/s

—

SATA 6Gb/s

—

SATA 6Gb/s

Weight

690 g

—

715 g

—

720 g

Width

101.6 mm

—

101.6 mm

—

101.6 mm

Power

Power Consumption

6.5 Watt (typical), 5.6 Watt (idle)

—

6.8 Watt (active), 5.5 Watt (idle)

—

6.9 Watt (read), 6.9 Watt (write), 4.9 Watt (idle), 0.3 Watt (standby), 0.3 Watt (sleep)

Miscellaneous

Compliant Standards

RoHS 2011/65/EU, RoHS 2015/863/EU, BSMI, ICES-003, NMB-003, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB Scheme, TUV, UL

—

ROHS Directive 2015/863/EU, ROHS Directive 2011/65/EU

—

RoHS, BSMI, ICES-003, NMB-003, FCC, KC, Maghreb, RCM, UKCA, VCCI, CB Scheme, TUV, UL

Reliability

24x7 Operation

Yes

—

Yes

Load / Unload Cycles

600,000

—

600,000

MTBF

2,500,000 hours

—

2,000,000 hours

—

2,000,000 hours

Non-Recoverable Errors

1 per 10^15

—

10 per 10^15

Performance

Average Latency

4.16 ms

—

Drive Class

—

Enterprise

—

Drive Transfer Rate

600 MBps (external)

—

600 MBps (external)

—

600 MBps (external)

Internal Data Rate

262 MBps

—

267 MBps

—

267 MBps

Spindle Speed

7200 rpm

—

7200 rpm

—

7200 rpm

Connections & Expansion

Compatible Bay

3.5"

—

3.5"

—

3.5"

Interfaces

1 x SATA 6 Gb/s

—

1 x SATA 6 Gb/s

—

1 x SATA 6 Gb/s

Environmental Parameters

Max Operating Temperature

60 °C

—

60 °C

—

65 °C

Max Storage Temperature

70 °C

—

70 °C

—

70 °C

Min Operating Temperature

5 °C

—

5 °C

—

0 °C

Min Storage Temperature

-40 °C

—

-40 °C

—

-40 °C

Shock Tolerance (non-operating)

250 g @ 2 ms half-sine wave

—

300 g @ 2 ms half-sine wave

—

300 g @ 2 ms

Shock Tolerance (operating)

50 g @ 2 ms half-sine wave

—

70 g @ 2 ms half-sine wave

—

65 g @ 2 ms

Sound Emission

34 dBA

—

29 dBA

—

29 dBA

Vibration Tolerance (non-operating)

1.04 g @ 2-200 Hz

—

Vibration Tolerance (operating)

0.67 g @ 5-500 Hz

—

Software / System Requirements

OS Required

Linux, Microsoft Windows Server, Microsoft Windows

—

Manufacturer Warranty

Service & Support

Limited warranty - 5 years

—

Limited warranty - 5 years

—

Limited warranty - 5 years