Product comparison · 2 internal hard drives

HP 18.2GB 15K Ultra3 SCSI vs HP 651909-B21 internal hard drive

6specifications compared
5differ
1identical
16known for one product only

Key differences

HDD capacity
- 18.2GB 15K Ultra3 SCSI:18.2 GB
- 651909-B21 internal hard drive:300 GB
HDD speed
- 18.2GB 15K Ultra3 SCSI:15000 RPM
- 651909-B21 internal hard drive:10000 RPM
HDD size
- 18.2GB 15K Ultra3 SCSI:3.5"
- 651909-B21 internal hard drive:2.5"
Interface
- 18.2GB 15K Ultra3 SCSI:SCSI
- 651909-B21 internal hard drive:SAS
Operating voltage
- 18.2GB 15K Ultra3 SCSI:5 / 12 V
- 651909-B21 internal hard drive:5 V

Side by side

Differences highlightedShow differences only

Comparison of 18.2GB 15K Ultra3 SCSI, 651909-B21
22 specifications	A HP 18.2GB 15K Ultra3 SCSI View product	B HP 651909-B21 internal hard drive Model 651909-B21 View product
Features4 differ
HDD capacityDiffers	18.2 GB	300 GB
HDD speedDiffers	15000 RPM	10000 RPM
HDD sizeDiffers	3.5"	2.5"
InterfaceDiffers	SCSI	SAS
Component for	Server/workstation	Server/workstation
Hot-swapKnown for one	Yes	Unknown — not stated by the source
Storage drive buffer sizeKnown for one	4 MB	Unknown — not stated by the source
Read seek timeKnown for one	4.9 ms	Unknown — not stated by the source
Write seek timeKnown for one	5.4 ms	Unknown — not stated by the source
Average latencyKnown for one	2.99 ms	Unknown — not stated by the source
TypeKnown for one	Unknown — not stated by the source	HDD
HDD interface transfer rateKnown for one	Unknown — not stated by the source	6 Gbit/s
Power1 differ
Operating voltageDiffers	5 / 12 V	5 V
Operational conditionsidentical
Operating temperature (T-T)Known for one	5 - 60 °C	Unknown — not stated by the source
Operating relative humidity (H-H)Known for one	5 - 95%	Unknown — not stated by the source
Weight & dimensionsidentical
HeightKnown for one	25.4 mm	Unknown — not stated by the source
WeightKnown for one	725 g	Unknown — not stated by the source
Other featuresidentical
Drive device, transfer rateKnown for one	160 MB/s	Unknown — not stated by the source
InternalKnown for one	Yes	Unknown — not stated by the source
Number of products includedKnown for one	1 pc(s)	Unknown — not stated by the source
Windows operating systems supportedKnown for one	Yes	Unknown — not stated by the source
Linux operating systems supportedKnown for one	Yes	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.

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