Product comparison · 2 internal hard drives

Seagate Cheetah 15K.5 147GB FC 20pk vs Seagate ST930818AM 30GB

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

Key differences

The Seagate Cheetah 15K.5 147GB FC 20pk has 116.8 GB more HDD capacity than the Seagate ST930818AM 30GB (146.8 GB vs 30 GB). The Seagate Cheetah 15K.5 147GB FC 20pk has 9,600 RPM more HDD speed than the Seagate ST930818AM 30GB (15000 RPM vs 5400 RPM). The Seagate Cheetah 15K.5 147GB FC 20pk has 1" more HDD size than the Seagate ST930818AM 30GB (3.5" vs 2.5"). Interface: Fibre Channel on the Seagate Cheetah 15K.5 147GB FC 20pk, IDE/ATA on the Seagate ST930818AM 30GB. Operating voltage: 5 / 12 V on the Seagate Cheetah 15K.5 147GB FC 20pk, 5 V on the Seagate ST930818AM 30GB.

HDD capacity
- Cheetah 15K.5 147GB FC 20pk:146.8 GB
- ST930818AM 30GB:30 GB
HDD speed
- Cheetah 15K.5 147GB FC 20pk:15000 RPM
- ST930818AM 30GB:5400 RPM
HDD size
- Cheetah 15K.5 147GB FC 20pk:3.5"
- ST930818AM 30GB:2.5"
Interface
- Cheetah 15K.5 147GB FC 20pk:Fibre Channel
- ST930818AM 30GB:IDE/ATA
Storage drive buffer size
- Cheetah 15K.5 147GB FC 20pk:16 MB
- ST930818AM 30GB:8 MB
HDD number of heads
- Cheetah 15K.5 147GB FC 20pk:4
- ST930818AM 30GB:1
Read seek time
- Cheetah 15K.5 147GB FC 20pk:3.5 ms
- ST930818AM 30GB:13 ms
Write seek time
- Cheetah 15K.5 147GB FC 20pk:4 ms
- ST930818AM 30GB:14 ms

Side by side

Differences highlightedShow differences only

Comparison of Cheetah 15K.5 147GB FC 20pk, ST930818AM 30GB
32 specifications	A Seagate Cheetah 15K.5 147GB FC 20pk View product	B Seagate ST930818AM 30GB View product
Features9 differ
HDD capacityDiffers	146.8 GB	30 GB
HDD speedDiffers	15000 RPM	5400 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Fibre Channel	IDE/ATA
Storage drive buffer sizeDiffers	16 MB	8 MB
HDD number of cylindersKnown for one	Unknown — not stated by the source	16383
HDD number of headsDiffers	4	1
Read seek timeDiffers	3.5 ms	13 ms
Write seek timeDiffers	4 ms	14 ms
Full stroke seek timeKnown for one	Unknown — not stated by the source	23 ms
Track to track seek timeKnown for one	Unknown — not stated by the source	1 ms
Average latencyDiffers	2 ms	5.6 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1000000 h
Component forKnown for one	Server/workstation	Unknown — not stated by the source
Power1 differ
Operating voltageDiffers	5 / 12 V	5 V
Operational conditions1 differ
Operating temperature (T-T)Differs	5 - 55 °C	-20 - 75 °C
Storage temperature (T-T)Known for one	-40 - 70 °C	Unknown — not stated by the source
Operating shockKnown for one	60 G	Unknown — not stated by the source
Non-operating shockKnown for one	250 G	Unknown — not stated by the source
Weight & dimensions4 differ
WidthDiffers	101.6 mm	69.8 mm
DepthDiffers	46 mm	100.2 mm
HeightDiffers	25.4 mm	9.5 mm
WeightDiffers	771 g	102 g
Other featuresidentical
HDD transfer rateKnown for one	Unknown — not stated by the source	100 Mbit/s
Power requirementsKnown for one	Unknown — not stated by the source	5V ± 5%
Recording densityKnown for one	Unknown — not stated by the source	840 kbit/inch
Track densityKnown for one	Unknown — not stated by the source	150k tracks/inch
Drive device, transfer rateKnown for one	400 MB/s	Unknown — not stated by the source
Compatible productsKnown for one	PCs	Unknown — not stated by the source
Acoustic pressure emissionsKnown for one	32 dB	Unknown — not stated by the source

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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