When a hard drive fails it can happen for several different reasons. The hard drive might have a software fault such as bad sectors on disk platters, firmware issues that operate the hard drive, operating system faults and file read errors caused by sector problems or viruses or malware. Hard drives have moving parts and also can suffer from mechanical or physical damage such as read/write head damage, motor damage and damage to the disk platters. We have been recovering data in London from hard drives for 14 years. We recover data from all the leading manufacturers. It is important you get your data diagnosed by a Professional Data Recovery Company. Below is a list of some of the common faults we receive in for recovery. Hard Drive Recovery Service: External hard drive fail from all the leading manufacturers for different reasons. External hard drives are basically internal hard drives in an external case. Most of the external drives today are Sata or SSD drives. In the past these drives would have had IDE connections. The large manufacturers these days for external drives are Seagate, Western Digital, Toshiba, Lacie, Buffalo etc. External drives fail and have the same problems as failed internal drives. Examples of software faults on external drives are bad sectors, firmware issues, malware, viruses etc. Examples of mechanical or physical faults on external drives are faulty or seized motor, faulty read/write head assembly, disk platter damage etc. We are the leading London Data Recovery Company with 14 years experience. Below is a list of common external drive faults we receive in for recovery. Raid Data Recovery London: A Raid 5, Raid 1 or Raid 0 server or rack system can fail for a different number of reasons. Common Raid failures include power surges that damage the raid controller card or the hard drives, Raid rebuilds that have gone wrong, Hard disk failure to one or more disks in the Raid Array, system upgrade that has gone wrong, corrupted data on Raid Array, Firmware upgrade that has gone wrong etc. If you experience any of these problems we have 14 years experience of recovering data from failed Raid Systems including Dell PowerEdge Servers, HP Proliant, IBM ServerRaid, Qnap NAS etc. Give us a call for free professional advice. We can normally diagnose a Raid system over the phone. Apple Mac hard drives can fail like any other manufacturer. Most of the hard drives inside Mac laptops today or 2.5″ and 1.8″ SATA, SSD, ZIF drives in laptop systems and 3.5″ SAAT drives inside their iMac Desktop system. In the past the drives would have had standard IDE connections. There are signs your Mac may be experience software type problems such as question mark on booting up Mac, won't let you log on, will not get past the boot up screen