Product comparison · 2 internal hard drives

Seagate SkyHawk ST4000VX005 internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

13specifications compared
12differ
1identical
27known for one product only

Key differences

The Seagate SkyHawk ST4000VX005 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 SkyHawk ST4000VX005 internal hard drive has 1" more HDD size than the Seagate Constellation ST91000642SS-RF internal hard drive (3.5" vs 2.5"). The Seagate SkyHawk ST4000VX005 internal hard drive has 192 MB more storage drive buffer size than the Seagate Constellation ST91000642SS-RF internal hard drive (256 MB vs 64 MB). Interface: Serial ATA III on the Seagate SkyHawk ST4000VX005 internal hard drive, SAS on the Seagate Constellation ST91000642SS-RF internal hard drive. Operating temperature (T-T): 0 - 70 °C on the Seagate SkyHawk ST4000VX005 internal hard drive, 5 - 60 °C on the Seagate Constellation ST91000642SS-RF internal hard drive.

HDD capacity
- SkyHawk ST4000VX005 internal hard drive:4 TB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD size
- SkyHawk ST4000VX005 internal hard drive:3.5"
- Constellation ST91000642SS-RF internal hard drive:2.5"
Interface
- SkyHawk ST4000VX005 internal hard drive:Serial ATA III
- Constellation ST91000642SS-RF internal hard drive:SAS
Storage drive buffer size
- SkyHawk ST4000VX005 internal hard drive:256 MB
- Constellation ST91000642SS-RF internal hard drive:64 MB
Mean time between failures (MTBF)
- SkyHawk ST4000VX005 internal hard drive:1000000 h
- Constellation ST91000642SS-RF internal hard drive:1400000 h
Power consumption (typical)
- SkyHawk ST4000VX005 internal hard drive:3.7 W
- Constellation ST91000642SS-RF internal hard drive:6.35 W
Start-up current
- SkyHawk ST4000VX005 internal hard drive:1.8 A
- Constellation ST91000642SS-RF internal hard drive:2 A
Operating temperature (T-T)
- SkyHawk ST4000VX005 internal hard drive:0 - 70 °C
- Constellation ST91000642SS-RF internal hard drive:5 - 60 °C

Side by side

Differences highlightedShow differences only

Comparison of ST4000VX005, ST91000642SS-RF
40 specifications	A Seagate SkyHawk ST4000VX005 internal hard drive Model ST4000VX005 View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features5 differ
HDD capacityDiffers	4 TB	1 TB
HDD speedKnown for one	Unknown — not stated by the source	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)Differs	1000000 h	1400000 h
Component forKnown for one	Digital video recorder (DVR)	Unknown — not stated by the source
HDD interface transfer rateKnown for one	6 Gbit/s	Unknown — not stated by the source
Uncorrectable Bit Error Rate (UBER)Known for one	< 1 per 10^14 bits read	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
Power2 differ
Power consumption (typical)Differs	3.7 W	6.35 W
Operating voltageKnown for one	Unknown — not stated by the source	5 V
Start-up currentDiffers	1.8 A	2 A
Power consumption (standby)Known for one	0.25 W	Unknown — not stated by the source
Power consumption (idle)Known for one	2.5 W	Unknown — not stated by the source
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 70 °C	5 - 60 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-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 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 & dimensions4 differ
WidthDiffers	101.8 mm	69.8 mm
DepthDiffers	20.2 mm	100 mm
HeightDiffers	147 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.

More internal hard drive comparisons

All internal hard drive comparisons