I am using Acer Laptop one day before my Hard Disk is not detected in BIOS and not booting it's shows Insert Boot Disk and I am try another H.D.D it's boot perfectly in my Laptop but,I want detect and recover my data on not detected hard disk. I am not experience about Hard Disk please, can any one help me how to recover my data from not detected Hard Disk.
With the information given so far, the only answer with a high probability to work is to employ a commercial data recovery service. If the data is really valuable, consider doing this. In this case, trying to solve the problem yourself may do more harm than good.
There are many possible causes, drive's internal hardware, firmware, connector,... . Have you had a look at the Related questions on the right? For example, How do I recover data from my presumably dead hard disk.
Try connecting the drive to a computer that is running a different OS. For example, boot Linux from a disc.
You might get more focused help if you stated the exact model names of both drive and computer, and told us possible reasons why the drive failed to work (impact?).
I think you can use another device for recover your data. Its hard to connect to another computer that is running Windows. Note: your Hard Drive should be on Slave mode and the other one Hard Drive that the operating system is on it should be Master. Also, if your Hard Drive is not recognized in any way can not access your Data.