Each recovery case begins with a Toshiba hard drive data recovery to determine the potential for recovery and to provide an quote for your review. The initial diagnosis determines whether data recovery is possible at all and if so, how much it will cost and how long it will take to be done. Recovery of data from crashed hard disks often involves replacing failed or damaged components in a clean environment (Clean room class 100) and using specialised hardware and software tools to create the raw image. Failed components typically include electronics, read/write heads, head assemblies, magnets & drive motors. Logical data recovery uses the raw image by examining the low-level data sectors and determining what steps need to be taken in order to get access to the important data. This way, a logical data recovery analysis can determine the nature of the data loss and what methods need to be used to recover data and achieve best results. If the media is inaccessible our lab will test the components and closely examine its internal health to determine the extent of physical damage. Once a recovery has been successfully completed, file lists are created and data validity and integrity is checked. In addition to the specially in-house designed data recovery tools, we also use the highest quality and the most advanced data recovery technologies available to the data recovery industry. The hard drive has a corrupt or damaged partition table. The primary or secondary hard disk has failed and the system BIOS displays the message primary hard disk failure or secondary hard disk failure. There is one more problem that is typical for all hard drives: bad sectors. After some period of time magnetic surface starts to degrade and magnetic domains can't be turned in a desired direction by writing element of the head. This is how bad sectors appear. When the drive starts reading data from such unreadable bad sector it could start freezing, scratching and sometimes even clicking. This leads to further damage to the surface, heads and causes more data loss. As soon as you start experiencing such symptoms while reading important files stop the drive immediately and send it to our data recovery lab. Any further attempts would just add up to the problems. In our lab we use special imaging hardware tools that are capable of reading raw sector data ignoring checksum check. That's usually the only way to get as much data as possible from these sectors.