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Small silver 2.5 inch internal SAS hard drive with label showing 900GB 10000 RPM

HP

HP 785075-B21 900GB 10000RPM SAS 2.5" internal hard drive

SKU CH-B3ZG-STP1W

900 GB SAS internal hard drive spinning at 10,000 RPM in a 2.5-inch form factor

  • Total capacity900 GB
  • Interface typeSAS
  • Form factor2.5 in (6.35 cm)
  • Rotational speed10,000 RPM
  • 900 GB capacity stores large enterprise datasets
  • 10,000 RPM spindle speed accelerates transaction-heavy workloads
  • 12 Gb/s SAS interface sustains high-throughput data transfers
  • 5-inch small form factor fits dense server bays
  • New condition ensures full manufacturer-rated reliability

HP 785075-B21 900GB SAS drive

This HP 785075-B21 is a 900GB internal hard drive built for enterprise servers and storage arrays. It spins at 10000 RPM and uses a SAS interface running at 12Gb/s. The 2.5-inch form factor fits small form factor drive bays and hot-plug carriers.

Suited for high-transaction server workloads

The drive targets mission-critical applications that demand high availability, reliability and data integrity. It is not for systems that lack a SAS controller or backplane, or for builds requiring a 3.5-inch large form factor drive. Buyers needing capacities beyond 900GB or a different spindle speed should look elsewhere.

12Gb/s SAS interface decides compatibility

The single specification that determines fit is the 12Gb/s SAS interface standard. The host system must provide a compatible SAS connection and a 2.5-inch drive bay. Without that interface the drive cannot operate.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $251.99
Pricier than about 77% of the 4,938 comparable items (median $107.99).
Total capacity 900 GB
Lower than about 64% of the 2,372 comparable items (median 2 TB).
Price per TB $279.99 per TB
Pricier than about 83% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Total capacity900 GB
Performance
Rotational speed10,000 RPM
Ports & slots
Interface typeSAS
Size & build
Form factor2.5 in (6.35 cm)

Questions about this item

Should I choose the 900GB capacity or a different size for this SAS drive?

The 900GB capacity suits workloads needing fast 10000 RPM access in a 2.5 inch bay. Larger capacities may run at lower spindle speeds.

What does the 10000 RPM figure mean for real-world server performance?

It means the platters spin at 10000 revolutions per minute, giving lower latency and higher sustained throughput for transaction-heavy applications.

How does the 12Gb/s SAS interface limit actual transfer speed?

The 12Gb/s SAS standard caps the theoretical link at 12 gigabits per second; real throughput depends on the controller and workload.

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