Hi guys, recently i switched off my laptop-windows 7 premium 32bit,2gb ram,duo core processor-whilst my samsung external harddrive was still connected to it. I rebooted the comp but this time the external harddrive didnt show up under "My Computer' but it still runs in the background. I have tried using the cmd prompts like 'chkdsk' 'changing drive letter from f to g/h' etc but nothing happens.Please help!!!!!

SOURCE: Computer doesn't recognize drive anymore

Advice,

Sounds like you are swapping this external drive between two PC's. Why don't you do this! Get it connected to one of your PC's preferrably your desktop. Once you get it connected and it is able to be read and you can read files or acces it! Share it out, under Windows XP you can share out drives, files, printers etc.

Once you do this both PC's can share this device without you having to swap between PC's manually!
I can walk you through this if you need further help, but if this persists, it sounds like your files are corrupt on this drive you may need to reformat the drive.

SOURCE: External Drive not recognized

You need to format your disk followint the solution by RobJ

SOURCE: Ext WD500GB drive not being recognised by my computer,but seen in device manager

try downloading this and and scan may be it might locate yr drive since windows can still see it in device manager. and with these u can recover even deleted and formated files. try it
http://services.seagate.com its trial version so u can get a full version n pay little or find similar software but i know yr drive can still work fine its just that we r missing something here.
thank u

SOURCE: a disk read error has occured press CTRL-ALT-DELETE to restart.

check power chord or port of hard drive if u dont find any prob. pleace re insert power cord with card board packing. definetly u solve the problem.

SOURCE: Simple tech 500gb usb hard drive

Youve damadged the harddrive, is the harddrive spinning or making any noise?