Case Study 2 – Seagate ST320LT020-9YG142 Bad Head Hard Disk Data Recovery
Seagate 320GB HDD Very Slow Reading & Bad Head Data Recovery in Chennai
Case ID: 1853VE
Drive Type: Seagate 2.5-inch SATA Hard Disk Drive
Model: ST320LT020-9YG142
Serial Number: W0455EB6
Firmware: 0010SDM1
Capacity: 320GB
Total Sectors: 625,142,448
Problem Reported
The client submitted a Seagate ST320LT020-9YG142 320GB hard disk to Ram Infotech Data Recovery Center with a very low reading speed and unstable sector access problem.
Initial diagnosis indicated symptoms consistent with a weak or damaged read/write head.
The drive contained two partitions, but the client required data recovery only from the D: partition.
Initial Diagnosis
During the sector-level diagnostic process, the hard disk was responding extremely slowly. Multiple read errors were detected while accessing the media.
The drive repeatedly generated segment read errors such as:
Seg Read Error at LBA = 005E8620
Seg Read Error at LBA = 005E8A80
Seg Read Error at LBA = 005E8EE0
Seg Read Error at LBA = 005E9340
Seg Read Error at LBA = 005E97A0
Seg Read Error at LBA = 005E9C00
Seg Read Error at LBA = 005EA060
Seg Read Error at LBA = 005EA4C0
Seg Read Error at LBA = 005EA920
Seg Read Error at LBA = 005EAD80
Seg Read Error at LBA = 005EB1E0
Seg Read Error at LBA = 005EB640
Seg Read Error at LBA = 005EBAA0
Seg Read Error at LBA = 005EBF00
These repeated read errors, combined with the extremely slow response, suggested that the drive was unable to reliably read certain platter areas.
Technical Information
The following information was identified during diagnosis:
Original Drive Capacity Including MC : 25BA2630
Host LBA – Maximum Host LBA : 2542EAB0
Disc LBA – Maximum Disc LBA : 04B744C5
MC Offset – User Partition Host LBA : 00743D70
The drive also generated:
Input Command Error
F3 T>
Rst 0x10M
(P) SATA Reset
The SATA reset behaviour and repeated read instability confirmed that this was not a normal logical-data-loss case.
Root Cause
After diagnosis, the hard disk showed symptoms of a weak/bad read-write head combined with unstable media reading.
Typical symptoms found in this case included:
Extremely slow sector reading
Repeated segment read errors
Unstable access to certain LBA ranges
SATA reset behaviour
Read timeout or command errors
Difficulty maintaining continuous imaging
Continuing to repeatedly scan a weak-head hard disk using ordinary data recovery software can increase stress on the drive and potentially make the condition worse.
Data Recovery Requirement
The Seagate hard disk contained two partitions.
The client specifically requested:
Recover data only from the D: drive / second partition.
Instead of unnecessarily stressing the entire disk, the recovery process was focused on the partition and sector ranges relevant to the client's required data.
Recovery Process
Our data recovery engineers performed controlled diagnosis and sector-level recovery of the affected Seagate hard drive.
The recovery process included:
Checking HDD identification, firmware and capacity.
Analysing read/write head behaviour.
Identifying unstable and unreadable LBA ranges.
Controlling repeated read attempts to reduce unnecessary stress on the failing head.
Working around slow and problematic sectors.
Creating a sector-level image of recoverable areas.
Focusing recovery on the client's required D: partition.
Reconstructing the file system from the recovered sectors.
Extracting the required files from the recovered partition.
Verifying the recovered data before delivery.
Result – Data Recovered
The Seagate ST320LT020-9YG142 hard disk was successfully processed for data recovery.
Despite the bad/weak head symptoms, very slow reading speed, repeated segment read errors and unstable sectors, our engineers were able to recover the required data from the client's D: partition.
Case Status
SOLVED – Required D: Drive Data Recovered
Seagate Bad Head Hard Disk Data Recovery in Chennai
A hard disk with a weak or damaged read/write head may show symptoms such as:
Hard disk detected but reading extremely slowly
Files taking a very long time to open
Disk freezing during copy operations
CRC or read errors
Bad sectors increasing rapidly
Drive disconnecting during data transfer
SATA reset errors
Clicking or repeated retry sounds
Partition visible but files inaccessible
Hard disk not detecting consistently
If important data is stored on a failing HDD, avoid repeatedly running CHKDSK, formatting the disk, initializing it, or scanning it multiple times using ordinary recovery software.
Professional diagnosis should be performed before further stressing the drive.
Professional Hard Disk Data Recovery in Chennai
Ram Infotech Data Recovery Center provides professional data recovery services for:
Hard Disk • External HDD • SSD • NVMe • USB Pen Drive • Memory Card • RAID Storage
We handle data-loss situations including:
Bad Read/Write Heads • Very Slow HDD • Not Detecting • Bad Sectors • Deleted Files • Formatted Drives • Corrupted Partitions • Media Failure • Firmware Problems
Ram Infotech Data Recovery Center
Since 2007 • 10 Branches in Chennai
No. 24/13, Ground Floor,
Pillayar Koil Street,
Near R8 Police Station,
Vadapalani, Chennai,
Tamil Nadu – 600026
Phone: 070921 14422
Website: datarecoverychennai.co.in
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