Product comparison · 2 internal hard drives

Seagate S-series ST4000NC000-RF internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

22specifications compared
15differ
7identical
15known for one product only

Key differences

The Seagate S-series ST4000NC000-RF internal hard drive has 3 TB more HDD capacity than the Seagate Constellation ST91000642SS-RF internal hard drive (4 TB vs 1 TB). The Seagate Constellation ST91000642SS-RF internal hard drive has 1,300 RPM more HDD speed than the Seagate S-series ST4000NC000-RF internal hard drive (7200 RPM vs 5900 RPM). The Seagate S-series ST4000NC000-RF internal hard drive has 1" more HDD size than the Seagate Constellation ST91000642SS-RF internal hard drive (3.5" vs 2.5"). Interface: Serial ATA III on the Seagate S-series ST4000NC000-RF internal hard drive, SAS on the Seagate Constellation ST91000642SS-RF internal hard drive. Operating voltage: 5 / 12 V on the Seagate S-series ST4000NC000-RF internal hard drive, 5 V on the Seagate Constellation ST91000642SS-RF internal hard drive.

HDD capacity
- S-series ST4000NC000-RF internal hard drive:4 TB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD speed
- S-series ST4000NC000-RF internal hard drive:5900 RPM
- Constellation ST91000642SS-RF internal hard drive:7200 RPM
HDD size
- S-series ST4000NC000-RF internal hard drive:3.5"
- Constellation ST91000642SS-RF internal hard drive:2.5"
Interface
- S-series ST4000NC000-RF internal hard drive:Serial ATA III
- Constellation ST91000642SS-RF internal hard drive:SAS
Read seek time
- S-series ST4000NC000-RF internal hard drive:12 ms
- Constellation ST91000642SS-RF internal hard drive:7.5 ms
Write seek time
- S-series ST4000NC000-RF internal hard drive:12 ms
- Constellation ST91000642SS-RF internal hard drive:8.5 ms
Bytes per sector
- S-series ST4000NC000-RF internal hard drive:4096
- Constellation ST91000642SS-RF internal hard drive:512
Mean time between failures (MTBF)
- S-series ST4000NC000-RF internal hard drive:800000 h
- Constellation ST91000642SS-RF internal hard drive:1400000 h

Side by side

Differences highlightedShow differences only

Comparison of ST4000NC000-RF, ST91000642SS-RF
37 specifications	A Seagate S-series ST4000NC000-RF internal hard drive Model ST4000NC000-RF View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features8 differ
HDD capacityDiffers	4 TB	1 TB
HDD speedDiffers	5900 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Storage drive buffer size	64 MB	64 MB
HDD number of heads	8	8
Read seek timeDiffers	12 ms	7.5 ms
Write seek timeDiffers	12 ms	8.5 ms
Average latencyKnown for one	Unknown — not stated by the source	4.16 ms
Bytes per sectorDiffers	4096	512
Refurbished	Yes	Yes
Mean time between failures (MTBF)Differs	800000 h	1400000 h
Average seek timeKnown for one	12 ms	Unknown — not stated by the source
SMART technologyKnown for one	Yes	Unknown — not stated by the source
Power2 differ
Power consumption (typical)Differs	6.49 W	6.35 W
Operating voltageDiffers	5 / 12 V	5 V
Start-up currentKnown for one	Unknown — not stated by the source	2 A
Power consumption (standby)Known for one	0.77 W	Unknown — not stated by the source
Power consumption (idle)Known for one	4.59 W	Unknown — not stated by the source
Operational conditions1 differ
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)Differs	5 - 90%	5 - 95%
Storage relative humidity (H-H)	5 - 95%	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 - 12192 m
Operating shockKnown for one	Unknown — not stated by the source	70 G
Non-operating shockKnown for one	Unknown — not stated by the source	400 G
Weight & dimensions3 differ
WidthDiffers	101.8 mm	69.8 mm
DepthKnown for one	Unknown — not stated by the source	100 mm
HeightDiffers	26.1 mm	15 mm
WeightDiffers	606 g	200 g
Other features1 differ
Data transfer rateDiffers	6 Gbit/s	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

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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