What to do if your computer hard drive is not recognized

People who use laptops may have encountered unreadable data and failed to identify hard drive failures such as hard drives. So what are the causes of these failures? How to solve it after the appearance? How to recover data loss caused by hard disk damage? After consulting professional data recovery personnel, I consulted the relevant knowledge to summarize the answers as follows:
1. The hard drive does not respond after power-on
When the power is switched on, the laptop is activated and the hard drive is not found in the BIOS (network cabling). If this happens, most of it is caused by a problem with the hard drive motor. At this time, should find the Shanghai Day Shield Data Recovery Center of Professional maintenance personnel for maintenance.
2. The hard drive makes the "Da Da" sound
When the hard drive of the laptop makes a "da" sound or other abnormal sound, it indicates a problem with the head. At this time, the laptop should be closed immediately, the laptop to the Shanghai Day Shield Data Recovery Center Repair site repair. Otherwise, your precious data will be gone.
3. Unable to access data and cannot replicate data
When you enter the operating system, you can see the data on the hard disk, but you cannot access the data, and you cannot copy and paste the data. In this case, you can basically determine that there is a bad path on the hard disk, or there may be a problem with the hard drive firmware. You can use the software to check the bad road to test whether the hard drive has a bad path.
4. The hard drive is running normally and the BIOS cannot detect
When the laptop is started, the hard drive is not detected in the BIOS, but the hard drive is working (computer maintenance). This situation is basically caused by a firmware problem, or it may be the loss of hard disk initialization information. If this is the case, the data is basically unable to "save" itself.
5. Hard Drive Error identification
When using a laptop, it is found that the laptop hard drive detected in the BIOS is different from the actual hard drive. This situation is due to the drive head offset, there may be a problem with the hard drive firmware, causing the hard drive to be mistaken.
The hardware damage of these hard disks, generally cannot recover data by software, I suggest to encounter the above problems when the laptop closed to professional data Recovery Center. It is best to check the recovery mechanism in advance, need to have their own recovery characteristics, recovery efficiency, there must be a professional dust-free studio and advanced data Recovery technician. Like Shanghai Day Shield Data Recovery Center Such a more professional recovery center repair hard disk recovery data success rate is higher.

What to do if your computer hard drive is not recognized