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
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
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 relative humidity (H-H)Differs	5 - 90%	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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