The Main Symptom of This Type of Hard Drive Failure

      Hard drive failure is usually caused from the four major symptoms, the symptoms of firmware corruption, mechanical failure, electronic failure and logical failure. this is caused by the hard drive itself or of the components in it and use the system, and harddiks period of life itself. are equally able to stimulate the bad sectors on our harddiks. 

Let's discuss each one of the main symptoms of the failure harddiks

1. Firmware.

      Firmware is actually a software code that is embedded in hardware devices such as hard drives, firmware serves as a storage controller. This code is often broken does not work so as to make the operating system (eg windows) can not communicate well to harddiks, so the data stored therein yag sesalu asking to be restored.  
      If this failure occurs gejalah firmware, harddiks will operate normally work as usual. but not for the BIOS of the computer. BIOS can detect this gejalah. because this sort of thing make it work fatherly successfully recover data from our hadrdiks aka firmware on the program back by a system of data on hard drives recovered. then be restored back to normal.  

2. Electronic failure

     such failure is more electronic in nature tends to harddiks. such as printed circuit board called a motherboard harddiks. This often occurs due to sudden surges of electricity that flows in the electronic circuits that cause damage to some of the chips mounted on a PCB board. this makes harddiks can not operate in full and would make the stored data will be damaged should be immediately restored. 

3. Mechanical failure

     This type of failure refers to the internal components of the disk becomes corrupted. This type of problem usually presents with unusual clicking or ticking sound coming from the drive. It is important for users not to take cover from the drive, do this not only void the warranty of any kind but more importantly allows the internal atmosphere of controlled and isolated to be contaminated by dust motes. Drive to be taken apart in a clean room. 
       Mechanical failure is most often presents challenges to data recovery specialists. If the arm carrying the    read-write heads (components that access the data and write new data to disk) crash into the platters, a lot of damage can be caused. This is known as a head crash. Usually though, a head crash is quite a rare occurrence and the drive will have some other kind of mechanical failure. Data can be recovered at between 50% and 80% of cases of mechanical failure.

4. Logical errors

      The term logical errors covers a spectrum of problems ranging from the very simple (eg. an invalid entry on the disk's file allocation table) to the extremely complex (eg. overwritten data caused by the incorrect usage of an imaging program). The success of data recovery procedures for this type of problem is dependent upon where the damaged or overwritten data is held on the platters, and how the incident occurred in the first place.
      The four types of hard disk failure present different challenges to data recovery technicians. Some data recovery companies will claim to recover 100% of data from any type of failure, but unfortunately this is a dishonest assertion. Potential customers also need to be wary of "no fix, no fee" offers made by some companies. Their technicians would naturally be unwilling to spend time attempting complex recoveries which may not result in revenue and will therefore often dismiss the more difficult, but entirely possible, jobs as "unrecoverable". It is always advisable to get a second opinion if you have been told that your data cannot be retrieved.