Product comparison · 2 internal hard drives

HP 1TB 7200 RPM Enterprise SATA 2nd HDD vs HP 857644-B21 internal hard drive

7specifications compared
3differ
4identical
3known for one product only

Key differences

HDD capacity
- 1TB 7200 RPM Enterprise SATA 2nd HDD:1 TB
- 857644-B21 internal hard drive:10 TB
Interface
- 1TB 7200 RPM Enterprise SATA 2nd HDD:Serial ATA III
- 857644-B21 internal hard drive:SAS
HDD interface transfer rate
- 1TB 7200 RPM Enterprise SATA 2nd HDD:6 Gbit/s
- 857644-B21 internal hard drive:12 Gbit/s

Side by side

Differences highlightedShow differences only

Comparison of 1TB 7200 RPM Enterprise SATA 2nd HDD, 857644-B21
10 specifications	A HP 1TB 7200 RPM Enterprise SATA 2nd HDD View product	B HP 857644-B21 internal hard drive Model 857644-B21 View product
Features3 differ
HDD capacityDiffers	1 TB	10 TB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA III	SAS
Type	HDD	HDD
Component for	Server/workstation	Server/workstation
Storage drive buffer sizeKnown for one	32 MB	Unknown — not stated by the source
HDD interface transfer rateDiffers	6 Gbit/s	12 Gbit/s
Poweridentical
Operating voltageKnown for one	5 / 12 V	Unknown — not stated by the source
Packaging contentidentical
Storage drive adapter includedKnown for one	No	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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