Case:
Lenovo Computer can recognize the hard disk in BIOS, but cannot enter the system.After the customer discovered the problem, removed the hard disk from the laptop and scanned it with a software and found a large amount of red XX.Then send it directly during the data recovery.
Solution:
After the data recovery engineer received the disk sent by the customer, he communicated with the customer. There are many bad channels through professional testing hard disks, which is basically the same as the customer describes.The engineer hung the hard disk on the UDMA to set some parameters to read the bad tract with DE software and then start the image. The customer data was fully restored through more than 3 hours.