Hitachi HEJ423020F9AT00 3.5″ hard drive with a storage capacity of 2 TB and featuring a SATA interface. Hitachi HEJ423020F9AT00 Enterprise 2 TB 3.5″ Internal Hard Drive Serial ATA-600 7200 RPM 64 MB Buffer.

All information about the Hitachi HEJ423020F9AT00 hard disk drive: technical parameters, failure symptoms, frequently asked questions, reviews, HDD repair and data recovery.

Hitachi HEJ423020F9AT00

Hitachi HEJ423020F9AT00 Technical Details:

Manufacturer:
Hitachi (HGST)
Hard Disk Model:
HEJ423020F9AT00
Disk Family:
Enterprise SATA Series
Form Factor:
3.5″
Capacity:
2 TB (2,000,000,000,000 bytes)
Formatted Capacity:
Approximately 1.81 TB
Number Of Disks:
2 or 3
Number Of Heads:
4 or 5
Rotational Speed:
7200 RPM
Average Seek Time:
8.2 ms (read) / 9.0 ms (write)
Disk Interface:
Serial ATA-600 (SATA 6 Gb/s)
Buffer Size:
65536 KB (64 MB)
External Transfer Rate:
600 MB/s
Mean Time Between Failures (MTBF):
1,200,000 hours
Workload Rating:
550 TB/year

Note: The Hitachi HEJ423020F9AT00 is an enterprise-class SATA hard drive designed for 24/7 operation in servers and storage arrays. These drives feature enhanced reliability, rotational vibration sensors, and time-limited error recovery (TLER/CCTL) for RAID environments.


Hitachi HEJ423020F9AT00 Hard Drives:

  • HEJ423020F9AT00 – 2 TB Enterprise SATA Hard Drive
  • Family: Hitachi Enterprise SATA series (Ultrastar A7K2000 family)

Hitachi HEJ423020F9AT00 Failure Symptoms:

  • Electrical Failure Symptoms:
    Drive is powered, but shows no sign of function;
    Disk knocking as the motor fails to spin;
    Clicking sound as the heads search or initialize;
  • Mechanical Failure Symptoms:
    Clicking, grinding sounds;
    Completely quiet due to ” motor freeze”;
    “music” tone as the disk is powered up;
  • Logical Failure Examples:
    Accidental deletion, accidental format, file corruption, software bugs, file system corruption, viruses and malware, and many, many more.
  • Firmware Failure Symptoms:
    drive powers up, but is not recognised by the computer;
    Drive powers up, but is recognised wrongly, sometimes with nonsensical characters;
    Drive freezes during booting up;
  • Bad Platter Area Symptoms:
    Hard disk still accessible but appear to “hang” or “sluggish”;
    Constant Cyclic Redundancy (CRC) errors;
    Unable to access folders or files which could be seen;
  • Complex Failure Model

Hitachi HEJ423020F9AT00 Data Recovery & HDD Repair:

When it comes to data recovery one of the most common problems Hitachi HEJ423020F9AT00 hard drive experience is a burned circuit board (PCB). Therefore, if you need to replace the PCB, be sure to match the “PCB Number” of the current board, such as, etc.

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