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Product comparison · 2 internal hard drives

Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk vs Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk

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  • 23specifications compared
  • 17differ
  • 6identical
  • 6known for one product only

Key differences

The Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk has 10 GB more HDD capacity than the Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk (40 GB vs 30 GB). The Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk has 3,000 RPM more HDD speed than the Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk (7200 RPM vs 4200 RPM). The Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk has 1" more HDD size than the Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk (3.5" vs 2.5"). Interface: Serial ATA II on the Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk, Ultra-ATA/100 on the Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk. Operating voltage: 5 / 12 V on the Seagate Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk, 5 V on the Seagate Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulk.

  • HDD capacity
    • 40 GB
    • 30 GB
  • HDD speed
    • 7200 RPM
    • 4200 RPM
  • HDD size
    • 3.5"
    • 2.5"
  • Interface
    • Serial ATA II
    • Ultra-ATA/100
  • Storage drive buffer size
    • 2 MB
    • 8 MB
  • Average latency
    • 4.16 ms
    • 5.6 ms
  • Power consumption (standby)
    • 1.30 W
    • 0.26 W
  • Operating voltage
    • 5 / 12 V
    • 5 V

Side by side

Differences highlightedShow differences only
29 specifications
A

Seagate

Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulkView product
B

Seagate

Momentus 4200.2 30GB Ultra ATA/100 4200RPM 8MB 25pk bulkView product
Features6 differ
HDD capacityDiffers40 GB30 GB
HDD speedDiffers7200 RPM4200 RPM
HDD sizeDiffers3.5"2.5"
InterfaceDiffersSerial ATA IIUltra-ATA/100
Storage drive buffer sizeDiffers2 MB8 MB
HDD number of cylindersKnown for one16383
HDD number of headsKnown for one16
Average latencyDiffers4.16 ms5.6 ms
Component forKnown for oneLaptop
Average seek timeKnown for one12.5 ms
Power3 differ
Power consumption (standby)Differs1.30 W0.26 W
Operating voltageDiffers5 / 12 V5 V
Start-up currentDiffers2.8 A1 A
Operational conditions3 differ
Operating temperature (T-T)Differs0 - 60 °C5 - 55 °C
Operating shockDiffers63 G250 G
Non-operating shockDiffers350 G900 G
Weight & dimensions4 differ
WidthDiffers101.6 mm69.8 mm
DepthDiffers147 mm100.2 mm
HeightDiffers26.1 mm9.5 mm
WeightDiffers580 g100 g
Other features1 differ
Dimensions (WxDxH)Differs101.6 x 146.99 x 26.1 mm69.85 x 100.2 x 9.5 mm
Data transfer rateKnown for one3 Gbit/s
Drive device, transfer rateKnown for one100 MB/s

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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