How to repair inaccessible hard disk partition

trixxta

Honorable
Nov 27, 2012
1
0
10,510
hi i use a seagate desktop external harddrive.i use windows 7 ultimate OS but my external harddrive is now inaccessible.it gives a drive letter in the my computer console and gives a dialog box saying "you need to format this partition first to use it".i have 4 partitions on the harddrive and all of them are inaccessible.can my drive be repaired or its now jus a matter of recovering my data.have tried all sorts of tricks.have gone to disk mgnt to try to change permissions and ownership bt it gives an error.have tried converting file system from raw to ntfs through command prompt but it says option not available for raw file systems.have tried chkdsk in cmd prompt and it says access denied.help plizz