Product comparison · 2 internal hard drives

Seagate IronWolf Pro ST4000NE0025 internal hard drive vs Seagate IronWolf Pro ST8000NE0021 internal hard drive

Key differences

HDD capacity
- IronWolf Pro ST4000NE0025 internal hard drive:4 TB
- IronWolf Pro ST8000NE0021 internal hard drive:8 TB
Storage drive buffer size
- IronWolf Pro ST4000NE0025 internal hard drive:128 MB
- IronWolf Pro ST8000NE0021 internal hard drive:256 MB
Power consumption (typical)
- IronWolf Pro ST4000NE0025 internal hard drive:8.5 W
- IronWolf Pro ST8000NE0021 internal hard drive:9 W
Power consumption (idle)
- IronWolf Pro ST4000NE0025 internal hard drive:5.45 W
- IronWolf Pro ST8000NE0021 internal hard drive:7.6 W
Non-operating vibration
- IronWolf Pro ST4000NE0025 internal hard drive:3 G
- IronWolf Pro ST8000NE0021 internal hard drive:5 G
Non-operating shock
- IronWolf Pro ST4000NE0025 internal hard drive:300 G
- IronWolf Pro ST8000NE0021 internal hard drive:250 G
Weight
- IronWolf Pro ST4000NE0025 internal hard drive:680 g
- IronWolf Pro ST8000NE0021 internal hard drive:780 g

Differences highlightedShow differences only

Comparison of ST4000NE0025, ST8000NE0021
29 specifications	A Seagate IronWolf Pro ST4000NE0025 internal hard drive Model ST4000NE0025 View product	B Seagate IronWolf Pro ST8000NE0021 internal hard drive Model ST8000NE0021 View product
Features2 differ
HDD capacityDiffers	4 TB	8 TB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
Interface	Serial ATA III	Serial ATA III
Type	HDD	HDD
Component for	NAS	NAS
Storage drive buffer sizeDiffers	128 MB	256 MB
HDD interface transfer rate	6 Gbit/s	6 Gbit/s
HDD sustained transfer rateKnown for one	25.51 MiB/s	Unknown — not stated by the source
Average latency	4.16 ms	4.16 ms
Mean time between failures (MTBF)	1200000 h	1200000 h
Power2 differ
Power consumption (typical)Differs	8.5 W	9 W
Power consumption (standby)	0.6 W	0.6 W
Power consumption (off)	0.6 W	0.6 W
Power consumption (idle)Differs	5.45 W	7.6 W
Operating voltage	5 / 12 V	5 / 12 V
Start-up current	2 A	2 A
Operational conditions2 differ
Operating temperature (T-T)	5 - 60 °C	5 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Non-operating vibrationDiffers	3 G	5 G
Operating shock	70 G	70 G
Non-operating shockDiffers	300 G	250 G
Packaging contentidentical
Storage drive adapter included	No	No
Weight & dimensions1 differ
Width	101.8 mm	101.8 mm
Depth	147 mm	147 mm
Height	26.1 mm	26.1 mm
WeightDiffers	680 g	780 g
Packaging dataidentical
Quantity per pack	1 pc(s)	1 pc(s)
Logistics dataidentical
Harmonized System (HS) codeKnown for one	84717050	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.