Product comparison · 2 internal hard drives

Seagate 20GB LD25 vs Seagate Constellation ST3500415SS internal hard drive

16specifications compared
15differ
1identical
15known for one product only

Key differences

HDD capacity
- 20GB LD25:20 GB
- Constellation ST3500415SS internal hard drive:500 GB
HDD speed
- 20GB LD25:5400 RPM
- Constellation ST3500415SS internal hard drive:7200 RPM
HDD size
- 20GB LD25:2.5"
- Constellation ST3500415SS internal hard drive:3.5"
Interface
- 20GB LD25:Ultra-ATA/100
- Constellation ST3500415SS internal hard drive:Serial ATA II
Storage drive buffer size
- 20GB LD25:2 MB
- Constellation ST3500415SS internal hard drive:16 MB
Read seek time
- 20GB LD25:16 ms
- Constellation ST3500415SS internal hard drive:8.5 ms
Write seek time
- 20GB LD25:16 ms
- Constellation ST3500415SS internal hard drive:9.5 ms
Average latency
- 20GB LD25:5.6 ms
- Constellation ST3500415SS internal hard drive:4.16 ms

Side by side

Differences highlightedShow differences only

Comparison of 20GB LD25, ST3500415SS
31 specifications	A Seagate 20GB LD25 View product	B Seagate Constellation ST3500415SS internal hard drive Model ST3500415SS View product
Features8 differ
HDD capacityDiffers	20 GB	500 GB
HDD speedDiffers	5400 RPM	7200 RPM
HDD sizeDiffers	2.5"	3.5"
InterfaceDiffers	Ultra-ATA/100	Serial ATA II
Storage drive buffer sizeDiffers	2 MB	16 MB
Read seek timeDiffers	16 ms	8.5 ms
Write seek timeDiffers	16 ms	9.5 ms
Average latencyDiffers	5.6 ms	4.16 ms
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1200000 h
Power1 differ
Operating voltageDiffers	5 V	5 / 12 V
Start-up currentKnown for one	1 A	Unknown — not stated by the source
Power consumption (typical)Known for one	Unknown — not stated by the source	8 W
Operational conditions2 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating shockDiffers	100 G	70 G
Non-operating shockKnown for one	500 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	69.8 mm	101.6 mm
DepthDiffers	100.5 mm	147 mm
HeightDiffers	9.5 mm	26.1 mm
WeightDiffers	100 g	610 g
Other featuresidentical
Ethernet LANKnown for one	No	Unknown — not stated by the source
Fibre ChannelKnown for one	No	Unknown — not stated by the source
FireWire 400Known for one	No	Unknown — not stated by the source
FireWire 800Known for one	No	Unknown — not stated by the source
Internal	Yes	Yes
USB 2.0 ports quantityKnown for one	0	Unknown — not stated by the source
USB 3.2 Gen 1 (3.1 Gen 1) ports quantityKnown for one	0	Unknown — not stated by the source
USB poweredKnown for one	No	Unknown — not stated by the source
Dimensions (W x D x H) (imperial)Known for one	69.8 x 100.5 x 9.5 mm (2.75 x 3.96 x 0.374")	Unknown — not stated by the source
Weight (imperial)Known for one	0.0998 kg (0.22 lbs)	Unknown — not stated by the source
Drive device, transfer rateKnown for one	Unknown — not stated by the source	600 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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