Product comparison · 2 internal hard drives

Seagate Cheetah 15K.7 internal hard drive vs Seagate Constellation ST9500432SS internal hard drive

Key differences

HDD capacity
- Cheetah 15K.7 internal hard drive:300 GB
- Constellation ST9500432SS internal hard drive:500 GB
HDD speed
- Cheetah 15K.7 internal hard drive:15000 RPM
- Constellation ST9500432SS internal hard drive:7200 RPM
HDD size
- Cheetah 15K.7 internal hard drive:3.5"
- Constellation ST9500432SS internal hard drive:2.5"
Interface
- Cheetah 15K.7 internal hard drive:Ultra320 SCSI
- Constellation ST9500432SS internal hard drive:SAS
Read seek time
- Cheetah 15K.7 internal hard drive:3.4 ms
- Constellation ST9500432SS internal hard drive:8 ms
Write seek time
- Cheetah 15K.7 internal hard drive:3.9 ms
- Constellation ST9500432SS internal hard drive:8.4 ms
Average latency
- Cheetah 15K.7 internal hard drive:2 ms
- Constellation ST9500432SS internal hard drive:4.16 ms
Mean time between failures (MTBF)
- Cheetah 15K.7 internal hard drive:1600000 h
- Constellation ST9500432SS internal hard drive:1200000 h

Differences highlightedShow differences only

Comparison of 15K.7, ST9500432SS
27 specifications	A Seagate Cheetah 15K.7 internal hard drive Model 15K.7 View product	B Seagate Constellation ST9500432SS internal hard drive Model ST9500432SS View product
Features8 differ
HDD capacityDiffers	300 GB	500 GB
HDD speedDiffers	15000 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Ultra320 SCSI	SAS
Component forKnown for one	Server/workstation	Unknown — not stated by the source
Storage drive buffer size	16 MB	16 MB
HDD number of headsKnown for one	8	Unknown — not stated by the source
Read seek timeDiffers	3.4 ms	8 ms
Write seek timeDiffers	3.9 ms	8.4 ms
Average latencyDiffers	2 ms	4.16 ms
Mean time between failures (MTBF)Differs	1600000 h	1200000 h
Power4 differ
Power consumption (typical)Differs	13.8 W	3.83 W
Power consumption (standby)Differs	8.98 W	2.9 W
Operating voltageDiffers	5 / 12 V	5 V
Start-up currentDiffers	3.75 A	1.03 A
Operational conditions2 differ
Operating temperature (T-T)	5 - 55 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating vibrationKnown for one	1 G	Unknown — not stated by the source
Non-operating vibrationKnown for one	3 G	Unknown — not stated by the source
Operating shockDiffers	60 G	25 G
Non-operating shockDiffers	300 G	400 G
Weight & dimensions4 differ
WidthDiffers	101.8 mm	70.1 mm
DepthDiffers	147 mm	100.5 mm
HeightDiffers	26.1 mm	15 mm
WeightDiffers	671 g	196 g
Other features1 differ
Data transfer rateDiffers	4 Gbit/s	6 Gbit/s
Sustained data rateKnown for one	Unknown — not stated by the source	100 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.