Hitachi Endurastar J4K100 - 80.0GB 4260RPM Ultra ATA-100Mb/s 8MB Cache 2.5" 9.5mm Laptop Hard Drive - HEJ421080G9AT00


Warranty90 Day Warranty
AvailabilityYes - Ships in 3 to 5 Days
ManufacturerHitachi Global Storage Technology
SeriesHitachi Endurastar J4K100
UPC CodeDoes Not Apply

Product Specs

Product Specs
Capacity80.0 GB
Spindle Speed4260 RPM High Endurance Fluid Dynamic (FDB) Motor
Cache Buffer8 MB Intelligent Caching
Advanced FormatNo - 512 Sector Size (Bytes)
Form Factor2.5 Inch Internal Hard Drive
InterfacePATA (EIDE Ultra-DMA ATA-6)
Interface SpeedUltra DMA Mode-5 - ATA 100MB/sec
Data Transfer Rateup to 100MB/sec Host to/from Drive (Sustained)
Interface ConnectorPATA (44-Pin Signal/Power and 4-Pin Jumper)
Recording TechnologyPerpendicular Magnetic Recording (PMR) Technology
Life Expectancy300,000 Hours MTTF (Mean Time To Failures)
Workload Rating< 55 TB/yr (Workload Rate Limit) / 600,000 (Load/Unload Cycles)
Shock ResistanceOperating: 250Gs / 2ms - Non Operating: 800Gs / 1ms (half sine wave)
EncryptionNo - Standard Model
Rohs CompliantYes
Dimensions(L x W x H) 100.5mm x 70.0mm x 9.5mm
Part Number0A60187
ClassificationEndurance Drives

Key Features

  • Capacities up to 100GB
  • Built to run in 24/7 (always-on) Environments
  • Built for Extreme Temperature Environments
  • Shock Sensor Technology
  • 4260RPM Rotational Speed Motor
  • Read Multiple and Write Multiple Command Support
  • Intelligent Caching Technology
  • Full Track Multiple Sector Transfer Technology
  • Enhanced Humidity Absorption Technology
  • Perpendicular Magnetic Recording (PMR) Technology
  • 600,000 Load/Unload Cycles for Data Integrity
  • TrueTrack Servo Technology
  • Thermal Fly Height Control Technology
  • Enhanced Error Correction Code (ECC) Technology
  • Staggered Spin-Up Technology
  • High Endurance Fluid Dynamic Bearing (FDB) Motors

Hitachi Endurastar J4K100 Hard Drives

Large Capacity, Robust Features for Extreme Environments

HGST delivers an industry leading 100GB capacity in its latest Endurastar line of 2.5-inch hard drives designed especially for extreme environments. The Endurstar J4K100 and N4K100 models provide twice the capacity of their predecessors and are built to operate at altitudes of up to 5500 meters. The Endurastar J4K100 is designed for the most severe conditions, with an operating temperature range of -30oC to +85oC. For milder conditions, the Endurastar N4K100 provides an operating temperature range of -20oC to +75oC. The drives are offered in SATA and PATA interface options for design configuration flexibility.

Right Choice for the Road

Endurastar hard drives are built to meet the rigors of the automotive environment, including navigation, telematics, in-car entertainment and vehicle relational management. The drives have been designed using a proven 5th generation platform.

Rugged, Durable Design

These new Endurastar drives leverage time proven technologies pioneered on HGST hard drives for notebook PCs to deliver quiet acoustics and robust performance. FDB motors provide quiet operation, and Thermal Fly-height Control (TFC) enhances reliability by maintaining more consistent spacing between the read/write head and the disk. Already in use across its other product lines, perpendicular magnetic recording (PMR) technology has been implemented on Endurastar J4K100 and N4K100 to deliver excellent soft error rates for improved reliability and performance under even the harshest environmental conditions. All models come standard with proven shock sensor technology and enhanced humidity absorption for superior reliability.


  • Industry-leading 100GB capacity optimized for automotive applications.
  • High operating altitude range of up to 5500 meters.
  • Wide operating temperature range from -30oC to +85oC.
  • 5th generation product, based on proven technology.
  • PATA and SATA interfaces.


  • Automotive
  • GPS Navigation Systems
  • Surveillance Applications
  • Industrial Applications
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