Phenomenon: Either the technique will not recognize the hard disk, or the system recognizes the hard disk, but the hard disk can not turn on the challenging disk light flashing, double-click to die, right-click to die.

Cause: data recovery software free download when reading information from the hard disk (mostly because of unprotected use)

Remedy: Run CMD in WINDOWS
Enter CHKDSK really hard drive letter / F for example: CHKDSKH: / F then press Enter. Immediately after free unlimited data recovery software although, it will be repaired automatically.
CHKDSK command description:
The CHKDSK command is extremely useful for difficult disks. The main uses are as follows:

CHKDSK [volume [[path] filename]]] [/ F] [/ V] [/ R] [/ X] [/ C] [/ L [: size]]
volume specifies the drive (followed by a colon), mount point, or volume name.

filename is only used for FAT / FAT32: specifies regardless of whether to verify whether there's a fragmented file.

/ F Repair errors around the disk. (CHKDSKH: / F)

/ V on FAT / FAT32: Displays the complete path and name of each and every file on the disk. On NTFS: If there is a clear message, show it. (CHKDSKH: / V)

/ R finds incorrect sectors and restores readable information and facts (implies / F). (CHKDSKH: / R)

/ L: size is only utilized for NTFS: modify the log file size to the specified number of KB. If no size is specified, the current size is displayed.

/ X If needed, force the volume to be unmounted 1st. All open handles to the volume will probably be invalid (implied / F).

/ I is only applied for NTFS: Execute a much less intense verify around the index things.

/ C is only used for NTFS: skip the loop verify of your folder structure.

The / I and / C command line switches skip certain checks around the volume, reducing the time needed to run Chkdsk.