Product comparison · 2 internal hard drives

Seagate IronWolf Pro ST32000NT000 internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

16specifications compared
12differ
4identical
23known for one product only

Key differences

The Seagate IronWolf Pro ST32000NT000 internal hard drive has 31 TB more HDD capacity than the Seagate Constellation ST91000642SS-RF internal hard drive (32 TB vs 1 TB). The Seagate IronWolf Pro ST32000NT000 internal hard drive has 1" more HDD size than the Seagate Constellation ST91000642SS-RF internal hard drive (3.5" vs 2.5"). The Seagate IronWolf Pro ST32000NT000 internal hard drive has 1,100,000 h more mean time between failures (MTBF) than the Seagate Constellation ST91000642SS-RF internal hard drive (2500000 h vs 1400000 h). Interface: Serial ATA III on the Seagate IronWolf Pro ST32000NT000 internal hard drive, SAS on the Seagate Constellation ST91000642SS-RF internal hard drive. Bytes per sector: 512e on the Seagate IronWolf Pro ST32000NT000 internal hard drive, 512 on the Seagate Constellation ST91000642SS-RF internal hard drive.

HDD capacity
- IronWolf Pro ST32000NT000 internal hard drive:32 TB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD size
- IronWolf Pro ST32000NT000 internal hard drive:3.5"
- Constellation ST91000642SS-RF internal hard drive:2.5"
Interface
- IronWolf Pro ST32000NT000 internal hard drive:Serial ATA III
- Constellation ST91000642SS-RF internal hard drive:SAS
Bytes per sector
- IronWolf Pro ST32000NT000 internal hard drive:512e
- Constellation ST91000642SS-RF internal hard drive:512
Mean time between failures (MTBF)
- IronWolf Pro ST32000NT000 internal hard drive:2500000 h
- Constellation ST91000642SS-RF internal hard drive:1400000 h
Power consumption (typical)
- IronWolf Pro ST32000NT000 internal hard drive:8.3 W
- Constellation ST91000642SS-RF internal hard drive:6.35 W
Operating temperature (T-T)
- IronWolf Pro ST32000NT000 internal hard drive:10 - 60 °C
- Constellation ST91000642SS-RF internal hard drive:5 - 60 °C
Non-operating vibration
- IronWolf Pro ST32000NT000 internal hard drive:2.27 G
- Constellation ST91000642SS-RF internal hard drive:3 G

Side by side

Differences highlightedShow differences only

Comparison of ST32000NT000, ST91000642SS-RF
39 specifications	A Seagate IronWolf Pro ST32000NT000 internal hard drive Model ST32000NT000 View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features5 differ
HDD capacityDiffers	32 TB	1 TB
HDD speed	7200 RPM	7200 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Storage drive buffer sizeKnown for one	Unknown — not stated by the source	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 sectorDiffers	512e	512
RefurbishedKnown for one	Unknown — not stated by the source	Yes
Mean time between failures (MTBF)Differs	2500000 h	1400000 h
Component forKnown for one	Laptop	Unknown — not stated by the source
Hot-swapKnown for one	No	Unknown — not stated by the source
Hybrid-HDD cache memoryKnown for one	512 GB	Unknown — not stated by the source
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Power1 differ
Power consumption (typical)Differs	8.3 W	6.35 W
Operating voltageKnown for one	Unknown — not stated by the source	5 V
Start-up current	2 A	2 A
Power consumption (standby)Known for one	1.2 W	Unknown — not stated by the source
Power consumption (idle)Known for one	6.8 W	Unknown — not stated by the source
Operational conditions2 differ
Operating temperature (T-T)Differs	10 - 60 °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 vibrationDiffers	2.27 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 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 & dimensions4 differ
WidthDiffers	101.8 mm	69.8 mm
DepthDiffers	147 mm	100 mm
HeightDiffers	26.1 mm	15 mm
WeightDiffers	695 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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