Seagate ST9120312AS 2.5″ hard drive with a storage capacity of 120 GB and featuring a SATA interface. Seagate ST9120312AS Enterprise 120 GB 2.5″ Internal Hard Drive Serial ATA-150 5400 RPM 8 MB Buffer.
All information about the Seagate ST9120312AS hard disk drive: technical parameters, failure symptoms, frequently asked questions, reviews, HDD repair and data recovery.

Seagate ST9120312AS Technical Details:
Note: The Seagate ST9120312AS is a legacy 2.5″ laptop/enterprise hard drive offering 120 GB capacity with 5400 RPM.
Seagate ST9120312AS Hard Drives:
- ST9120312AS, 5SV, WU, PN 9GG13C-031, FW DE26, Seagate 120GB SATA 2.5 Hard Drive
Seagate ST9120312AS 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
Seagate ST9120312AS Data Recovery & HDD Repair:
When it comes to data recovery one of the most common problems Seagate ST9120312AS 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 100513491 REV A, etc.
