Western Digital

Western Digital 0B29920 1.2TB 10K SAS Enterprise HDD

5.0 (2 reviews)

Enterprise-grade 1.2TB 10K RPM SAS drive delivering high-capacity, high-speed storage for demanding data center workloads.

$285.00*
In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Western Digital (HGST) Ultrastar C10K1800, model 0B29920, is a 1.2TB enterprise hard drive engineered for the demanding requirements of modern data centers. Spinning at 10,000 RPM and connected via a 12Gb/s SAS interface, it delivers a meaningful step up in throughput and responsiveness compared to standard 7.2K RPM drives, making it well-suited for transactional databases, virtualized environments, and mixed workloads that require consistent performance around the clock.

Built in a compact 2.5-inch form factor, this drive fits into dense server and storage array configurations where space efficiency matters. The 128MB cache buffer helps smooth out I/O bursts, while the 4K Native (4KN) sector format aligns with modern storage architectures for improved efficiency. The Instant Secure Erase (ISE) feature provides a fast and secure method for data sanitization at end-of-life or during redeployment, an important consideration for organizations handling sensitive data. For environments that have not yet fully transitioned to all-flash storage, this drive offers a cost-effective balance of capacity, speed, and enterprise reliability.

Key Features

10K RPM

SAS 12Gb/s

Media cache architecture

Rotational Vibration Safeuard (RVS)

Workload detector technology

Specifications

Brand
Western Digital (HGST)
Model
0B29920
Series
Ultrastar C10K1800
Capacity
1.2TB (1200GB)
Spindle Speed
10,000 RPM
Interface
SAS 12Gb/s
Cache
128MB
Sector Format
4KN (4K Native)
Security
ISE (Instant Secure Erase)
Form Factor
2.5-Inch Internal

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Pros & Cons

👍 Pros

  • 1.2TB capacity is among the highest available for 10K RPM 2.5-inch SAS drives
  • 12Gb/s SAS interface provides fast data transfer for enterprise controllers
  • 128MB cache helps accelerate read and write operations under heavy workloads
  • Rated for continuous 24/7 operation in data center environments
  • Instant Secure Erase support enables fast, secure data sanitization

👎 Cons

  • 10K RPM mechanical drive is significantly slower than SAS SSDs for random I/O
  • SAS interface is not compatible with standard desktop SATA controllers
  • 2.5-inch form factor limits capacity compared to larger 3.5-inch enterprise drives
  • Mechanical components produce more heat and noise than solid-state alternatives

Frequently Asked Questions

It uses a 12Gb/s SAS interface. SAS is backward compatible with older 6Gb/s SAS controllers, though throughput will be limited to the controller's maximum speed.
4KN refers to 4K Native sector format, meaning the drive uses 4096-byte sectors natively. ISE stands for Instant Secure Erase, allowing rapid cryptographic erasure of all data on the drive.
Yes, the Ultrastar C10K1800 is specifically rated for 24x7 enterprise workloads, with a design and duty cycle built for always-on data center environments.
It is a 2.5-inch internal hard drive, designed to fit in standard SFF (Small Form Factor) enterprise drive bays.