Seagate ST9500420AS

ST9500420AS Seagate 2.5″ hard drive with a storage capacity of 500GB and featuring a SATA interface. ST9500420AS Seagate Momentus 500GB 7200RPM SATA 3GB/s 7-Pin 2.5-inch 16MB Cache Internal Hard DISK D.

All information about the Seagate ST9500420AS hard disk drive: technical parameters, failure symptoms, free asked questions, reviews, HDD repair and data recovery.

Seagate ST9500420AS Technical Details:

• Hard Disk Model: SEAGATE ST9500420AS
• Disk Family: Momentus 7200.4 500420
• Form Factor: 2.5″
• Capacity: 500 GB (500 x 1 000 000 000 bytes)
• Number Of Disks: 2
• Number Of Heads: 4
• Rotational Speed: 7200 RPM
• Rotation Time: 8.33 ms
• Average Rotational Latency: 4.17 ms
• Disk Interface: Serial-ATA/300
• Buffer-Host Max. Rate: 300 MB/seconds
• Buffer Size: 16384 KB
• Width: 69.85 mm (2.75 inch)
• Depth: 100.35 mm (3.95 inch)
• Height: 9.5 mm (0.37 inch)
• Weight: 110 grams (0.24 pounds)
• Acoustic (Idle): 2.3 Bel
• Acoustic (Min performance and volume): 2.5 Bel
• Acoustic (Max performance and volume): 3.0 Bel
• Required Power For Spinup: 1200 mA
• Power Required (Seek): 2.4 W
• Power Required (Idle): 1.2 W
• Power Required (Standby): 0.36 W
• Manufacturer: Seagate Technology

Seagate ST9500420AS Hard Drives:

• ST9500420AS, 5VJ, WU, PN 9HV144-022, FW 0006HPM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-037, FW D005SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• Seagate Momentus ST9500420AS 7200 500GB 7200RPM SATA 3Gb/s 16MB Cache 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-566, FW 0001BSM2, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-071, FW 0003LVM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-032, FW 0003SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-032, FW 0003SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-285, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-031, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-300, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-020, FW 0003HPM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-286, FW 0003SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-031, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-036, FW D004SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-021, FW 0005HPM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-033, FW 0004SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-040, FW 0006APM2, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-041, FW 0008APM2, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-141, FW 0002SDM2, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-033, FW 0004SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-150, FW 0001TSM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420AS, 5VJ, WU, PN 9HV144-500, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-042, FW 0009APM1, Seagate 500GB SATA 2.5″ Hard Drive
• ST9500420ASG, 5VJ, WU, PN 9PSG44-300, FW 0002SDM1, Seagate 500GB SATA 2.5″ Hard Drive
• Seagate ST9500420ASG, 7200RPM, 3.0Gp/s, 500GB SATA 2.5″ HDD

Seagate ST9500420AS 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 ST9500420AS Data Recovery & HDD Repair:

When it comes to data recovery one of the most common problems Seagate ST9500420AS Hard Disk Drive experience is burnt circuit board(PCB). So if you will need to match a replacement PCB, it is important that you note the “Board Number” of your current circuit board in addition to the hard drive’s “Model Number“.

Multiple PCB Number revisions:
100565308, 100535597, 100536286, etc.