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Defective Hard drive ?

A simple and fast service is our main objective. In the best cases, we recover your data in a few hours only.

Recovery of your Hard drive

The hard drive is the mechanical part of your PC used to store data permanently.

The hard disk is made up of superimposed plates whose surface is magnetized. Reading and writing are done through heads articulated on an arm.

A mechanical or electrical element can eventually be defective or broken which may cause data loss.

Data Recovery service offers you to repair this failure in order to recover your data. We work on all brands and all types of hard disk.

Brands of hard disk :

Types of hard disk :

  • IDE / ATA
  • Serial ATA (SATA)
  • SCSI
  • USB
  • Firewire

Areal density

The Areal density is the calculation of the quantity of data and the surface used to store it. The manufacturers (generally american brands) call it : Max Areal Density(Gbits / sq inch).

The relation between density per platter and Max Areal Density :

  • Dp = Density per platter
  • Ad = Max Areal Density
  • A = Area of a platter's surface

The formula to calculate the Areal Density of a HDD is the following : Ad = (( Dp / 2) / A) * 8


A is roughly worth 5,45 (sq inch) for a 3,5" hard disk. Dp is denominated in bytes, so we must multiply it by 8 to obtain bits.

Areal density calculus for a IBM HDD GXP75 series :
Every hard disk from this serie have a platter density of 15 Go, so the areal density is worth :

Ad = (( 15 / 2) / 5,45) * 8 = 11 (Gbits / sq inch).