Hi ! I want to recover data from my had disk I already download several recovery tools but the is most of the times hard disk doesn't detect and when detect then drive is not open and in DISK MANAGEMENT it shows blank in the field of file system nigther it shows FAT32 nor it shows NTFS what do I do to slove my problem?

For running any kind of recovery tool it must be detected and open first... hope I made my query clear :(

If you can't detect and open it then you WILL need a professional recovery service.
There are loads listed on the net.

Thanks for your quick reply... but don't know much about these things :'(