Product comparison · 2 internal hard drives

Seagate 30GB HDD vs Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A)

13specifications compared
6differ
7identical
27known for one product only

Key differences

The Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) has 90 GB more HDD capacity than the Seagate 30GB HDD (120 GB vs 30 GB). The Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) has 6 MB more storage drive buffer size than the Seagate 30GB HDD (8 MB vs 2 MB). The Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A) has 0.5 ms more average seek time than the Seagate 30GB HDD (12.5 ms vs 12 ms).

HDD capacity
- 30GB HDD:30 GB
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):120 GB
Storage drive buffer size
- 30GB HDD:2 MB
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):8 MB
Average seek time
- 30GB HDD:12 ms
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):12.5 ms
Average latency
- 30GB HDD:5.6 ms
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):5.56 ms
Weight
- 30GB HDD:99 g
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):100 g
Acoustic pressure emissions
- 30GB HDD:23 dB
- MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A):24 dB

Side by side

Differences highlightedShow differences only

Comparison of 30GB HDD, MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A)
40 specifications	A Seagate 30GB HDD View product	B Seagate MOMENTUS 4200.2 120GB 8MB ATA (ST9120824A)View product
Features4 differ
HDD capacityDiffers	30 GB	120 GB
TypeKnown for one	HDD	Unknown — not stated by the source
Storage drive buffer sizeDiffers	2 MB	8 MB
HDD number of headsKnown for one	2	Unknown — not stated by the source
Full stroke seek timeKnown for one	22 ms	Unknown — not stated by the source
Track to track seek timeKnown for one	2 ms	Unknown — not stated by the source
Average seek timeDiffers	12 ms	12.5 ms
Average latencyDiffers	5.6 ms	5.56 ms
Start/stop cyclesKnown for one	20000	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	330000 h	Unknown — not stated by the source
Poweridentical
Power consumption (typical)Known for one	2.4 W	Unknown — not stated by the source
Power consumption (standby)Known for one	0.36 W	Unknown — not stated by the source
Power consumption (idle)Known for one	1.2 W	Unknown — not stated by the source
Power consumption (read)Known for one	2.4 W	Unknown — not stated by the source
Power consumption (write)Known for one	2.4 W	Unknown — not stated by the source
Start-up currentKnown for one	1.2 A	Unknown — not stated by the source
Operational conditionsidentical
Storage temperature (T-T)Known for one	-40 - 65 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 90%	Unknown — not stated by the source
Storage relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Operating vibrationKnown for one	1 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	5 G	Unknown — not stated by the source
Operating altitudeKnown for one	-192.12 - 3048 m	Unknown — not stated by the source
Non-operating altitudeKnown for one	-304.8 - 12192 m	Unknown — not stated by the source
Operating shockKnown for one	225 G	Unknown — not stated by the source
Non-operating shockKnown for one	800 G	Unknown — not stated by the source
Weight & dimensions1 differ
WidthKnown for one	69.8 mm	Unknown — not stated by the source
DepthKnown for one	100.2 mm	Unknown — not stated by the source
HeightKnown for one	9.5 mm	Unknown — not stated by the source
WeightDiffers	99 g	100 g
Other features1 differ
Acoustic pressure emissionsDiffers	23 dB	24 dB
Power requirementsKnown for one	Unknown — not stated by the source	2 W
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	69.85 x 100.2 x 9.5 mm
InternalKnown for one	Unknown — not stated by the source	Yes

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.

More internal hard drive comparisons

All internal hard drive comparisons