Western Digital Black2 Dual Drive Review

Written by Edward Chester

January 13, 2014 | 10:40

Tags: #black #dual-drive #hard-drive #hdd #ssd

Companies: #wd #western-digital

CrystalDiskMark Benchmark Results

Website: CrystalDiskMark

We've chosen to drop ATTO Disk benchmark from our SSD reviews in favour of CrystalDiskMark. ATTO's highly compressible data pattern gives an unrealistic view of drive performance, and including a 'best case' benchmark for the benefit of SandForce drives is becoming less relevant as SSD partners move away from the SandForce platform.

CrystalDiskMark is similar to AS SSD in its use of incompressible data files, performing sequential, 512KB and 4KB random read and write tests. it also tests with a more realistic 32 queue-depth as opposed to AS SSD's 64 queue-depth, a load that's less relevant for a home-user.

Sequential Performance


CrystalDiskMark 1,000MB

Incompressible Data, 1,000MB Sequential Read

  • Samsung SSD 840 Pro 256GB
  • Samsung SSD 840 Evo 500GB
  • Crucial M4 512GB
  • Samsung SSD 840 Evo 120GB
  • Samsung SSD 840 250GB
  • OCZ Vector 256GB
  • Crucial M4 256GB
  • OCZ Vertex 4 256GB
  • Crucial M500 480GB
  • SanDisk Ultra Plus 256GB
  • WD Black2 Dual Drive SSD
  • Corsair Neutron GTX 480GB
  • WD Black2 Dual Drive HDD
    • 538
    • 537
    • 535
    • 534
    • 524
    • 520
    • 511
    • 502
    • 498
    • 450
    • 442
    • 429
    • 120
0
100
200
300
400
500
600
MB/sec, Higher Is Better
  • Average Read Speed

CrystalDiskMark 1,000MB

Incompressible Data, 1,000MB Sequential Write

  • Samsung SSD 840 Evo 500GB
  • OCZ Vector 256GB
  • Samsung SSD 840 Pro 256GB
  • OCZ Vertex 4 256GB
  • Corsair Neutron GTX 480GB
  • Crucial M500 480GB
  • Samsung SSD 840 Evo 120GB
  • SanDisk Ultra Plus 256GB
  • Crucial M4 256GB
  • Crucial M4 512GB
  • Samsung SSD 840 250GB
  • WD Black2 Dual Drive SSD
  • WD Black2 Dual Drive HDD
    • 525
    • 505
    • 504
    • 470
    • 434
    • 424
    • 414
    • 390
    • 278
    • 275
    • 256
    • 143
    • 119
0
100
200
300
400
500
MB/sec, Higher Is Better
  • Average Write Speed

Random Performance


CrystalDiskMark 1,000MB

Incompressible Data, 4K Random Read, Single QD

  • Samsung SSD 840 Evo 500GB
  • Samsung SSD 840 Evo 120GB
  • Samsung SSD 840 Pro 256GB
  • WD Black2 Dual Drive SSD
  • OCZ Vertex 4 256GB
  • SanDisk Ultra Plus 256GB
  • Samsung SSD 840 250GB
  • Crucial M500 480GB
  • Corsair Neutron GTX 480GB
  • OCZ Vector 256GB
  • Crucial M4 512GB
  • Crucial M4 256GB
  • WD Black2 Dual Drive HDD
    • 44.44
    • 41.10
    • 36.00
    • 31.45
    • 29.32
    • 29.15
    • 29.00
    • 28.64
    • 28.00
    • 28.00
    • 24.35
    • 24.26
    • 0.56
0
10
20
30
40
MB/sec, Higher Is Better
  • Average Random Read Speed

CrystalDiskMark 1,000MB

Incompressible Data, 4K Random Write, Single QD

  • Crucial M500 480GB
  • Samsung SSD 840 Evo 500GB
  • Samsung SSD 840 Evo 120GB
  • OCZ Vertex 4 256GB
  • SanDisk Ultra Plus 256GB
  • WD Black2 Dual Drive SSD
  • Crucial M4 512GB
  • Crucial M4 256GB
  • OCZ Vector 256GB
  • Samsung SSD 840 Pro 256GB
  • Corsair Neutron 480GB
  • Samsung SSD 840 250GB
  • WD Black2 Dual Drive HDD
    • 125.60
    • 119.70
    • 119.30
    • 105.70
    • 101.20
    • 100.20
    • 95.10
    • 94.62
    • 89.00
    • 88.00
    • 80.00
    • 74.00
    • 1.30
0
25
50
75
100
125
MB/sec, Higher Is Better
  • Average Random Write Speed

CrystalDiskMark 1,000MB

Incompressible Data, 4K Random Read, 32 QD

  • Samsung SSD 840 Pro 256GB
  • Samsung SSD 840 Evo 500GB
  • OCZ Vector 256GB
  • Samsung SSD 840 Evo 120GB
  • Samsung SSD 840 250GB
  • Crucial M500 480GB
  • Corsair Neutron GTX 480GB
  • SanDisk Ultra Plus 256GB
  • OCZ Vertex 4 256GB
  • WD Black2 Dual Drive SSD
  • Crucial M4 512GB
  • Crucial M4 256GB
  • WD Black2 Dual Drive HDD
    • 406.0
    • 404.8
    • 397.0
    • 390.6
    • 389.0
    • 355.8
    • 355.0
    • 288.0
    • 237.3
    • 235.7
    • 206.0
    • 194.0
    • 1.6
0
100
200
300
400
MB/sec, Higher Is Better
  • Average Random Read Speed

CrystalDiskMark 1,000MB

Incompressible Data, 4K Random Write, 32 QD

  • OCZ Vector 256GB
  • Samsung SSD 840 Evo 500GB
  • Samsung SSD 840 Pro 256GB
  • Crucial M500 480GB
  • Corsair Neutron GTX 480GB
  • Samsung SSD 840 250GB
  • OCZ Vertex 4 256GB
  • Crucial M4 256GB
  • Crucial M4 512GB
  • SanDisk Ultra Plus 256GB
  • Samsung SSD 840 Evo 120GB
  • WD Black2 Dual Drive SSD
  • WD Black2 Dual Drive HDD
    • 373.0
    • 371.7
    • 370.0
    • 346.3
    • 321.0
    • 246.0
    • 241.7
    • 238.0
    • 228.9
    • 154.3
    • 154.2
    • 144.6
    • 1.3
0
100
200
300
400
MB/sec, Higher Is Better
  • Average Random Write Speed

Read out performance analysis.
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