Product comparison · 2 internal hard drives

Seagate 1500GB 3.5" SATA II vs Seagate Cheetah 15K.6 300-GB

Key differences

HDD capacity
- 1500GB 3.5" SATA II:1.5 TB
- Cheetah 15K.6 300-GB:300 GB
HDD speed
- 1500GB 3.5" SATA II:7200 RPM
- Cheetah 15K.6 300-GB:15000 RPM
Interface
- 1500GB 3.5" SATA II:Serial ATA II
- Cheetah 15K.6 300-GB:SAS
Storage drive buffer size
- 1500GB 3.5" SATA II:32 MB
- Cheetah 15K.6 300-GB:16 MB
Read seek time
- 1500GB 3.5" SATA II:8.5 ms
- Cheetah 15K.6 300-GB:3.4 ms
Write seek time
- 1500GB 3.5" SATA II:10 ms
- Cheetah 15K.6 300-GB:3.9 ms
Average latency
- 1500GB 3.5" SATA II:4.16 ms
- Cheetah 15K.6 300-GB:2 ms
Mean time between failures (MTBF)
- 1500GB 3.5" SATA II:750000 h
- Cheetah 15K.6 300-GB:1600000 h

Differences highlightedShow differences only

Comparison of 1500GB 3.5" SATA II, Cheetah 15K.6 300-GB
26 specifications	A Seagate 1500GB 3.5" SATA II View product	B Seagate Cheetah 15K.6 300-GB View product
Features8 differ
HDD capacityDiffers	1.5 TB	300 GB
HDD speedDiffers	7200 RPM	15000 RPM
InterfaceDiffers	Serial ATA II	SAS
Type	HDD	HDD
Component forKnown for one	Unknown — not stated by the source	Server/workstation
Storage drive buffer sizeDiffers	32 MB	16 MB
HDD number of headsKnown for one	Unknown — not stated by the source	6
Read seek timeDiffers	8.5 ms	3.4 ms
Write seek timeDiffers	10 ms	3.9 ms
Average latencyDiffers	4.16 ms	2 ms
Mean time between failures (MTBF)Differs	750000 h	1600000 h
HDD sizeKnown for one	3.5"	Unknown — not stated by the source
Start/stop cyclesKnown for one	50000	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)	5 - 55 °C	5 - 55 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating shockKnown for one	Unknown — not stated by the source	60 G
Non-operating shockKnown for one	Unknown — not stated by the source	250 G
Weight & dimensions2 differ
WidthDiffers	101.6 mm	101.8 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	640 g	694 g
Other featuresidentical
Data transfer rateKnown for one	Unknown — not stated by the source	3 Gbit/s
InternalKnown for one	Unknown — not stated by the source	Yes
Track densityKnown for one	Unknown — not stated by the source	165 Gbits/inch2
Sustained data rateKnown for one	120 MB/s	Unknown — not stated by the source
Poweridentical
Operating voltageKnown for one	5 / 12 V	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.