Product comparison · 2 internal hard drives

Seagate IronWolf ST4000VN006_B3 internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

21specifications compared
18differ
3identical
22known for one product only

Key differences

The Seagate IronWolf ST4000VN006_B3 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 1,800 RPM more HDD speed than the Seagate IronWolf ST4000VN006_B3 internal hard drive (7200 RPM vs 5400 RPM). The Seagate IronWolf ST4000VN006_B3 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 IronWolf ST4000VN006_B3 internal hard drive, SAS on the Seagate Constellation ST91000642SS-RF internal hard drive. Operating voltage: 5 / 12 V on the Seagate IronWolf ST4000VN006_B3 internal hard drive, 5 V on the Seagate Constellation ST91000642SS-RF internal hard drive.

HDD capacity
- IronWolf ST4000VN006_B3 internal hard drive:4 TB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD speed
- IronWolf ST4000VN006_B3 internal hard drive:5400 RPM
- Constellation ST91000642SS-RF internal hard drive:7200 RPM
HDD size
- IronWolf ST4000VN006_B3 internal hard drive:3.5"
- Constellation ST91000642SS-RF internal hard drive:2.5"
Interface
- IronWolf ST4000VN006_B3 internal hard drive:Serial ATA III
- Constellation ST91000642SS-RF internal hard drive:SAS
Storage drive buffer size
- IronWolf ST4000VN006_B3 internal hard drive:256 MB
- Constellation ST91000642SS-RF internal hard drive:64 MB
Power consumption (typical)
- IronWolf ST4000VN006_B3 internal hard drive:4.8 W
- Constellation ST91000642SS-RF internal hard drive:6.35 W
Operating voltage
- IronWolf ST4000VN006_B3 internal hard drive:5 / 12 V
- Constellation ST91000642SS-RF internal hard drive:5 V
Start-up current
- IronWolf ST4000VN006_B3 internal hard drive:1.8 A
- Constellation ST91000642SS-RF internal hard drive:2 A

Side by side

Differences highlightedShow differences only

Comparison of ST4000VN006_B3, ST91000642SS-RF
43 specifications	A Seagate IronWolf ST4000VN006_B3 internal hard drive Model ST4000VN006_B3 View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features5 differ
HDD capacityDiffers	4 TB	1 TB
HDD speedDiffers	5400 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Storage drive buffer sizeDiffers	256 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 latencyKnown for one	Unknown — not stated by the source	4.16 ms
Bytes per sectorKnown for one	Unknown — not stated by the source	512
RefurbishedKnown for one	Unknown — not stated by the source	Yes
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	1400000 h
Component forKnown for one	NAS	Unknown — not stated by the source
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
HDD sustained transfer rateKnown for one	202 MiB/s	Unknown — not stated by the source
Rotational Vibration (RV) sensorsKnown for one	Yes	Unknown — not stated by the source
24/7 operationKnown for one	Yes	Unknown — not stated by the source
Start/stop cyclesKnown for one	600000	Unknown — not stated by the source
Workload rate limitKnown for one	180 TB/year	Unknown — not stated by the source
Mean time to failure (MTTF)Known for one	1000000 h	Unknown — not stated by the source
Power3 differ
Power consumption (typical)Differs	4.8 W	6.35 W
Operating voltageDiffers	5 / 12 V	5 V
Start-up currentDiffers	1.8 A	2 A
Power consumption (standby)Known for one	0.5 W	Unknown — not stated by the source
Power consumption (idle)Known for one	3.96 W	Unknown — not stated by the source
Operational conditions6 differ
Operating temperature (T-T)Differs	0 - 65 °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	0.25 G	0.5 G
Non-operating vibration	3 G	3 G
Operating altitudeDiffers	-304 - 3048 m	-60.96 - 3048 m
Non-operating altitudeDiffers	-304 - 12192 m	-60.96 - 12192 m
Operating shockDiffers	80 G	70 G
Non-operating shockDiffers	300 G	400 G
Weight & dimensions4 differ
WidthDiffers	101.8 mm	69.8 mm
DepthDiffers	147 mm	100 mm
HeightDiffers	20.2 mm	15 mm
WeightDiffers	490 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

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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