Product comparison · 2 internal hard drives

Seagate 15K.2 SAS 73GB vs Seagate Constellation.2 1TB

13specifications compared
9differ
4identical
22known for one product only

Key differences

HDD capacity
- 15K.2 SAS 73GB:73 GB
- Constellation.2 1TB:1 TB
HDD speed
- 15K.2 SAS 73GB:15000 RPM
- Constellation.2 1TB:7200 RPM
Interface
- 15K.2 SAS 73GB:SAS
- Constellation.2 1TB:Serial ATA III
Storage drive buffer size
- 15K.2 SAS 73GB:16 MB
- Constellation.2 1TB:64 MB
Average latency
- 15K.2 SAS 73GB:2 ms
- Constellation.2 1TB:4.16 ms
Operating temperature (T-T)
- 15K.2 SAS 73GB:5 - 55 °C
- Constellation.2 1TB:5 - 60 °C
Operating shock
- 15K.2 SAS 73GB:20 G
- Constellation.2 1TB:70 G
Non-operating shock
- 15K.2 SAS 73GB:300 G
- Constellation.2 1TB:400 G

Side by side

Differences highlightedShow differences only

Comparison of 15K.2 SAS 73GB, Constellation.2 1TB
35 specifications	A Seagate 15K.2 SAS 73GB View product	B Seagate Constellation.2 1TB View product
Features5 differ
HDD capacityDiffers	73 GB	1 TB
HDD speedDiffers	15000 RPM	7200 RPM
HDD size	2.5"	2.5"
InterfaceDiffers	SAS	Serial ATA III
Storage drive buffer sizeDiffers	16 MB	64 MB
HDD number of cylindersKnown for one	Unknown — not stated by the source	16383
Read seek timeKnown for one	Unknown — not stated by the source	7.5 ms
Write seek timeKnown for one	Unknown — not stated by the source	8.5 ms
Track to track seek timeKnown for one	Unknown — not stated by the source	0.44 ms
Average latencyDiffers	2 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Mean time between failures (MTBF)Known for one	1600000 h	Unknown — not stated by the source
Poweridentical
Operating voltage	5 V	5 V
Start-up currentKnown for one	Unknown — not stated by the source	2 A
Operational conditions3 differ
Operating temperature (T-T)Differs	5 - 55 °C	5 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Operating vibrationKnown for one	Unknown — not stated by the source	0.5 G
Non-operating vibrationKnown for one	Unknown — not stated by the source	3 G
Operating altitudeKnown for one	Unknown — not stated by the source	-60.96 - 3048 m
Non-operating altitudeKnown for one	Unknown — not stated by the source	-60.96 - 12195 m
Operating shockDiffers	20 G	70 G
Non-operating shockDiffers	300 G	400 G
Weight & dimensions1 differ
WeightDiffers	195 g	200 g
WidthKnown for one	70.1 mm	Unknown — not stated by the source
DepthKnown for one	100.5 mm	Unknown — not stated by the source
HeightKnown for one	15 mm	Unknown — not stated by the source
Other featuresidentical
Product colourKnown for one	Unknown — not stated by the source	Black
Data transfer rateKnown for one	Unknown — not stated by the source	6 Gbit/s
Drive ready timeKnown for one	Unknown — not stated by the source	20 s
Internal	Yes	Yes
Recording densityKnown for one	Unknown — not stated by the source	1544 kbit/inch
Track densityKnown for one	Unknown — not stated by the source	270 Ktracks/inch
Drive device, transfer rateKnown for one	600 MB/s	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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