Product comparison · 2 internal hard drives

HP 870759-K21 internal hard drive vs Seagate Constellation ST91000642SS-RF internal hard drive

9specifications compared
6differ
3identical
28known for one product only

Key differences

The HP 870759-K21 internal hard drive has 7,800 RPM more HDD speed than the Seagate Constellation ST91000642SS-RF internal hard drive (15000 RPM vs 7200 RPM). The HP 870759-K21 internal hard drive has 184.2 mm more width than the Seagate Constellation ST91000642SS-RF internal hard drive (254 mm vs 69.8 mm). The HP 870759-K21 internal hard drive has 119.2 mm more depth than the Seagate Constellation ST91000642SS-RF internal hard drive (219.2 mm vs 100 mm). HDD capacity: 900 GB on the HP 870759-K21 internal hard drive, 1 TB on the Seagate Constellation ST91000642SS-RF internal hard drive. Weight: 1.36 kg on the HP 870759-K21 internal hard drive, 200 g on the Seagate Constellation ST91000642SS-RF internal hard drive.

HDD capacity
- 870759-K21 internal hard drive:900 GB
- Constellation ST91000642SS-RF internal hard drive:1 TB
HDD speed
- 870759-K21 internal hard drive:15000 RPM
- Constellation ST91000642SS-RF internal hard drive:7200 RPM
Width
- 870759-K21 internal hard drive:254 mm
- Constellation ST91000642SS-RF internal hard drive:69.8 mm
Depth
- 870759-K21 internal hard drive:219.2 mm
- Constellation ST91000642SS-RF internal hard drive:100 mm
Height
- 870759-K21 internal hard drive:127 mm
- Constellation ST91000642SS-RF internal hard drive:15 mm
Weight
- 870759-K21 internal hard drive:1.36 kg
- Constellation ST91000642SS-RF internal hard drive:200 g

Side by side

Differences highlightedShow differences only

Comparison of 870759-K21, ST91000642SS-RF
37 specifications	A HP 870759-K21 internal hard drive Model 870759-K21 View product	B Seagate Constellation ST91000642SS-RF internal hard drive Model ST91000642SS-RF View product
Features2 differ
HDD capacityDiffers	900 GB	1 TB
HDD speedDiffers	15000 RPM	7200 RPM
HDD size	2.5"	2.5"
Interface	SAS	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 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	Server	Unknown — not stated by the source
Hot-swapKnown for one	Yes	Unknown — not stated by the source
HDD interface transfer rateKnown for one	12 Gbit/s	Unknown — not stated by the source
Poweridentical
Power consumption (typical)Known for one	Unknown — not stated by the source	6.35 W
Operating voltageKnown for one	Unknown — not stated by the source	5 V
Start-up currentKnown for one	Unknown — not stated by the source	2 A
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	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	254 mm	69.8 mm
DepthDiffers	219.2 mm	100 mm
HeightDiffers	127 mm	15 mm
WeightDiffers	1.36 kg	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
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.

More internal hard drive comparisons

All internal hard drive comparisons