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Wherever you are in the UK, EADR can assist in data recovery for you. EADR has worked with, and provided data recovery for clients from all areas of the UK (and into Europe, too!) We are pleased to work with personal customers, small businesses as well as blue chip companies, who have entrusted us to carry out data recovery from their hard disk drives and other media.
EADR Ltd is totally 100% dedicated to recovering and reuniting you with your lost data. You have our strict assurance that we will handle your data with total care and absolute confidentiality. For those which require it, we are happy to sign a non-disclosure agreement for your peace of mind. All aspects of clean room device repair and eventual data recovery are processed in-house, we do not and will not pass any portion of your case to a third party − we have no need to, at any level. We are also delighted to partner up with computer shops, IT professionals and other technology personnel who would like to work with a professional company to offer a specialist data recovery service.
Hard disk drives are data storage devices used for the storage and retrieval of digitally encoded data, typically using one or more rapidly rotating disks or ‘platters’ that are treated with magnetic coating or material. The disk platters are read with heads that are positioned on an actuator or arm. These read / write heads read and write data to the platter surfaces. Data is typically accessed in what is known as a random access manner, which means that individual data blocks can be stored or retrieved in any order rather than in sequence. Hard disk drives are termed as permanent storage, as the data is retained even when power is removed completely from the drive. The two most common types or ‘Form Factors’ that are in use for modern computers and Laptops are the 3.5” Form Factor for desktop computers, and the 2.5” Form Factor which are typically found in smaller devices such as laptop and other portable computers where size is a limiting factor. All of these hard disk drives are connected to their host systems by one of a number of standard interfaces such as PATA (Parallel ATA) SATA (Serial ATA), SCSI (Small computer Systems Interface) or SAS (Serial Attached SCSI).
These type of failures are typically, but not exclusively, down to bad sectors and drive media degradation. This is where the coating on the platters of the hard disk drive either becomes physically damaged or unstable. This can be due to either the physical damage from a head crash / contamination, or indeed just old age, and the ‘sectors’ associated with this damage or degradation become unreliable when storing the portion of data assigned to them. This at best can cause simple read errors resulting in your PC hanging, or ‘Blue Screening’ or at worst, stop it from operating (booting) completely. Typically, data recovery from these damaged sectors can be difficult, as most common software based data extraction techniques, will either stop extraction completely when encountering a read verification or ‘I/O error’ from a bad sector, or skip it completely leaving ‘holes’ in your recovered data. At EADR, we have the ability to look into these ‘bad sectors’ and recover as much data as possible from them, thus filling these holes in your data as completely as possible.
Electrical repairs are generally located to the main PCB (Printed Circuit Board) of the device. Although actual motor failures are uncommon, we have seen some hard drives that have had damage to the main feeds to the windings, rendering the drive inoperable. Most common electrical failures are due to the main PCB being supplied with too much power, in the case of most external drives it’s the incorrect power adapter being used, With internal hard drives it’s generally a spike from the mains electricity or indeed any other failed components within your computer than can supply transient voltage to your hard disk drive. These failures can at times be problematic and require varying levels of time and expertise to solve. With some manufacturers hard disk drives it is a simple case of component removal and replacement, with others, it will require the transferral of unique ‘adaptive’ data and or physical components that contain this and other crucial data that is required by the device to function correctly. Simply replacing the defective PCB seldom works for many modern hard disk drives, and for successful data recovery, we will generally (but not always) require the original PCB to enable us to process the recovery completely and successfully.
Any possible recovery from a mechanically failed hard disk drive will typically rely on the amount of damage that has been caused to the platters (where the actual data is stored). If this damage is too great, or indeed concentrated in the wrong area of the surface, then recovery will be impossible by any means. A typical mechanical repair to a hard disk drive will involve the replacement of the drives read / write heads in a Class 100 Clean chamber to keep the risk of any internal contamination to an absolute minimum, but very occasionally we will need to go deeper and replace the spindle motor bearings or indeed perform a full platter swap, but this procedure is a last resort. The Heads and other internal workings of the hard disk drive need to be matched completely or as closely as possible to provide the highest chance of success, but this is not always guaranteed as there are many factors not in our control that will come into play during the repair and recovery procedure. EADR has also developed and had manufactured several ‘bespoke’ tools for performing some of these more intricate procedures and can boast high success rates with our mechanical hard drive repairs.
Firmware repairs are by far the most common repair we undertake here at EADR. The firmware on your hard disk drive is stored in negative data sectors on the platters themselves, and this ‘Service Area’ is accessed exclusively by the hard disk drive itself when powering up and becoming ready to be used by your computer. These firmware modules are also used to store totally unique sector remapping information and lists of growing defects that occur to all hard disk drives during manufacture and indeed throughout their lifetime. Sometimes these crucial firmware modules become damaged, or indeed the sectors they are located in become unstable and corrupt the module itself, and we need to both repair these affected modules and relocate them to other sectors within the Service Area on the hard disk drive. Whilst sometimes very tricky, these repairs are not impossible, and due to their frequency, are very commonplace within the Data Recovery Industry. Whilst tools are readily available to access the firmware modules of all common hard disk drives, the repair techniques and procedures are not, and generally extensive research and development has to be undertaken to work around new errors and faults that we come across on an almost daily basis. EADR have extensive experience in these sort of hard disk drive repairs and access to a wealth of in-depth repair techniques that can be used alongside our hardware based tooling.