Product comparison · 2 internal hard drives

Seagate Enterprise ST1800MM0018-RF internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

20specifications compared
12differ
8identical
16known for one product only

Key differences

HDD capacity
- Enterprise ST1800MM0018-RF internal hard drive:1.8 TB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD speed
- Enterprise ST1800MM0018-RF internal hard drive:10000 RPM
- Constellation ST91000642SS-RF internal hard drive:7200 RPM
Storage drive buffer size
- Enterprise ST1800MM0018-RF internal hard drive:128 MB
- Constellation ST91000642SS-RF internal hard drive:64 MB
Average latency
- Enterprise ST1800MM0018-RF internal hard drive:2.9 ms
- Constellation ST91000642SS-RF internal hard drive:4.16 ms
Power consumption (typical)
- Enterprise ST1800MM0018-RF internal hard drive:7.8 W
- Constellation ST91000642SS-RF internal hard drive:6.35 W
Operating temperature (T-T)
- Enterprise ST1800MM0018-RF internal hard drive:5 - 55 °C
- Constellation ST91000642SS-RF internal hard drive:5 - 60 °C
Operating vibration
- Enterprise ST1800MM0018-RF internal hard drive:3.1 G
- Constellation ST91000642SS-RF internal hard drive:0.5 G
Non-operating vibration
- Enterprise ST1800MM0018-RF internal hard drive:0.5 G
- Constellation ST91000642SS-RF internal hard drive:3 G

Side by side

Differences highlightedShow differences only

Comparison of ST1800MM0018-RF, ST91000642SS-RF
36 specifications	A Seagate Enterprise ST1800MM0018-RF internal hard drive Model ST1800MM0018-RF View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features4 differ
HDD capacityDiffers	1.8 TB	1 TB
HDD speedDiffers	10000 RPM	7200 RPM
HDD size	2.5"	2.5"
Interface	SAS	SAS
Type	HDD	HDD
Storage drive buffer sizeDiffers	128 MB	64 MB
HDD number of headsKnown for one	Unknown — not stated by the source	8
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
Average latencyDiffers	2.9 ms	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
Refurbished	Yes	Yes
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1400000 h
HDD interface transfer rateKnown for one	12 Gbit/s	Unknown — not stated by the source
Power1 differ
Power consumption (typical)Differs	7.8 W	6.35 W
Operating voltage	5 V	5 V
Start-up currentKnown for one	Unknown — not stated by the source	2 A
Power consumption (idle)Known for one	4.55 W	Unknown — not stated by the source
Operational conditions4 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 vibrationDiffers	3.1 G	0.5 G
Non-operating vibrationDiffers	0.5 G	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 - 12192 m
Operating shockDiffers	40 G	70 G
Non-operating shock	400 G	400 G
Weight & dimensions3 differ
WidthDiffers	70.1 mm	69.8 mm
DepthDiffers	100.5 mm	100 mm
Height	15 mm	15 mm
WeightDiffers	199 g	200 g
Other featuresidentical
Data transfer rateKnown for one	Unknown — not stated by the source	4.69 Gbit/s
InternalKnown for one	Unknown — not stated by the source	Yes
Plug and PlayKnown for one	Unknown — not stated by the source	Yes
Packaging dataidentical
Quantity per packKnown for one	1 pc(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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