Recover data from internal hdd

[bhuwapavan]

I have Seagate HDD 500 Gb it detected by bios not seen in OS so how to recover data

 

[profkefah]

what is your operation system
and u connected the hdd as second hdd or primary hdd

 

[bhuwapavan]

I am using XP Operating system. check cable & connection its OK . when some free software show capacity of 3.92 gb.