External hard drives (HDDs) are used as additional storage and a reliable backup method. Portable and easy to use, external hard drives typically consist of a standard 2.5-inch or 3.5-inch hard drive in a simple case with an external port that connects to a computer or other media devices, most often via USB.When an external hard drive fails or gets damaged, Data Recovery Service offers qualified recovery specialists with industry leading and professional data recovery services for external hard drives.
Here are some of the external hard drive manufacturers we work with:
Seagate
SanDisk
Western Digital
Toshiba
Samsung
G-Tech, and many others
TYPES OF FAULTS IN EXTERNAL HARD DRIVES
There are three main types of external hard drive failure that can lead to data loss:
Physical failures
The internal parts of hard drives move at high speeds, and they can become less reliable as they age. The read/write heads of a hard drive are directly above the surface of the platters that store your data, and if they come into contact with the platters, data loss can occur. In addition to internal wear and scratches on the plates, other common physical faults include:
- The spindle that controls the rotation of the hard drive is blocked
- Drive levers do not work properly
- Grinding, clicking, or beeping noises from the drive due to a malfunctioning read/write head
Electronic failures
If your external hard drive has an electronic problem, it may stop working completely or display an error message, depending on which of its components has failed. Electronic failures are potentially as serious as physical hard drive failures and should only be handled by experienced data recovery professionals. Some external hard drives fail due to:
- Faulty fans on the drive
- Power cords are not plugged into grounded, surge-protected outlets.
- Power surge preventing the hard drive from shutting down properly
Logical errors
External hard drives can also lose data due to non-physical errors that affect the drive's performance. Some of these failures include:
- Damage due to virus attack
- Accidental deletion
- The host system does not recognize the media
TYPES OF HARD DISK FAILURES
Modern hard drives are technological marvels containing many sensitive components that are susceptible to physical, electrical, mechanical and logical failures.
Common problems include bad sectors, read/write head failures or sticking, PCB failure, and drive motor and bearing problems. All of these scenarios result in the hard drive stopping normal operation and require manual repair of the hard drive in a dedicated clean environment.
Logical
- Encryption
- Virus/malware
- Reformatting
- Deleted data
- Ransomware
Physical
- Reading errors
- Bad sectors
- Water damage
- Fire Damage
Mechanical
- Engine malfunction
- Head accident
- PCB failure
- Firmware errors
