A New Data Structure for Hard Drives

Advanced Format describes a new standard in the hard drive industry that changes the way information is stored and organized on a the disk.

Advanced Format drives incorporate several changes to optimize the actual data structure on the hard drive, including increasing the physical sector size from 512 bytes to a more efficient 4096 byte (4K) sector size. In order to ease the transition, current Advanced Format drives will continue to provide 512-byte emulation (512e) at the drive interface to provide backwards compatibility with legacy applications.

Using a Partition Alignment Tool

Most modern operating systems have been designed to work efficiently with Advanced Format drives. For optimum performance, it is important to ensure that the drive is partitioned correctly and that data is written in 4K blocks by both the operating system, and the application. Modern operating systems handle this automatically. When using Advanced Format drives in legacy environments, special tools may be required to optimize read/write performance and keep the data sectors aligned. HGST recommends using a disk partitioning utility to correct this condition by re-aligning the partition.

For more information on Advanced Format Drives, consult the HGST Advanced Format Technology Brief:

Download the HGST Advanced Format Brief

HGST Ultrastar C15K600 enterprise internal hard drive

Ultrastar C15K600

600GB, 450GB & 300GB
2.5-inch Enterprise Hard Drive

  • Mission-critical Performance – 15,000 RPM for faster data access
  • Best-in-class Power Management – Enables industry-leading power efficiency
  • Enterprise-class Protection – Multiple security and data encryption options

Data sheet
Compatibility guide

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Ultrastar C10K1800

1.8TB, 1.2TB, 900GB, 600GB, 450GB & 300GB
2.5-inch Enterprise Hard Drive

  • Best-in-class Performance – 2.5X faster random write than prior generation 10K HDDs
  • Best-in-class Capacity – Advanced Format models deliver up to 1.8TB
  • Enterprise-class Protection – Multiple security and data encryption options
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HGST Ultrastar 7K4000 enterprise internal hard drive

Ultrastar 7K4000

2TB, 3TB & 4TB
3.5-inch Enterprise Hard Drive

  • Massive space – Up to 4TB for capacity-optimized enterprise applications
  • Enterprise-class reliability – Field-proven second-generation design specified at 2M hours MTBF
  • Configuration flexibility – SATA and SAS models
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MegaScale DC 4000.B

4TB
3.5-inch Enterprise CoolSpin Hard Drive

  • Targeted Workload – Designed for low-workload data center applications that operate within 180TB per year
  • Minimizes Power – Advanced Power Management technology optimizes power consumption
  • High Capacity – Massive 4TB of storage for data center scale-out
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Travelstar Z7K500

500GB, 320GB & 250GB
2.5-inch 7mm Mobile Hard Drive

  • High Performance – 7200 RPM for faster data access
  • Big Capacity – Up to 500GB of storage
  • Low Profile – 7mm thickness for design flexibility
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Travelstar Z5K1000

1.0TB & 750GB
2.5-inch 7mm Mobile Hard Drive

  • Slim Shape – 7.0mm z-height fits thin and light PCs
  • Big Capacity – Up to 1TB for capacity-hungry, ultra-thin designs
  • Industry-best Ruggedness – Protects against bumps and rough handling in mobile environments
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HGST Travelstar Z5K500 mobile internal hard drive

Travelstar Z5K500

500GB, 320GB & 250GB
2.5-inch 7mm Mobile Hard Drive

  • Low Profile – 7mm thickness for slim designs
  • High Capacity – Up to 500GB
  • Quiet Operation –  Enjoy a richer audio-listening experience
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HGST Travelstar 7K1000 mobile hard drive

Travelstar 7K1000

1TB & 750GB
2.5-inch Mobile Hard Drive

  • High Performance – 7200 RPM for faster data access
  • Massive Capacity – Up to 1TB of storage space
  • Rugged Design – Best-in-class shock tolerance
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HGST Travelstar 7K750 mobile internal hard drive

Travelstar 7K750

500GB to 750GB
2.5-inch Mobile Hard Drive

  • High Performance – 7200 RPM for faster data access
  • Generous Capacity – up to 750GB
  • Encryption Security – Some models with self-encryption
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Travelstar 5K1500

1.5TB
2.5-inch Mobile Hard Drive

  • Highest 9.5mm capacity – At least 50% more than other 9.5mm HDDs
  • Quiet Acoustics – Richer audio-listening for music, movies and games
  • Data Security – Self-encrypting models
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HGST Travelstar 5K1000 mobile internal hard drive

Travelstar 5K1000

1TB, 750GB, 640GB
2.5-inch Mobile Hard Drive

  • Power Efficient – More "unplugged" notebook time
  • Quiet Acoustics – Richer audio-listening for music, movies and games
  • Data Security – Self-encrypting models
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Endurastar J4K320

80GB, 100GB, 200GB, 250GB & 320GB
2.5-inch Hard Disk Drive

  • Extreme Environments – Extra wide operating temperature range
  • Built for the Road – Ideal for automotive applications
  • High Capacity Up to 320GB
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