Solved Hitachi Drive wont appear in my computer and not accessible.

[Hineshptl]

my internal Hitachi HDD was working yesterday till i removed and attached it to another pc. when it didn't appear on that computer i put it back in its original place. where it did not work.
it is detected by the BIOS it appears in computer management but in 4 partition(i originally only had one)
and i cant assign a drive letter to it. it is healthy but wont appear in my computer and i cannot access the data on it.
i have the same problem with my external buffalo HDD which i removed at the same time as the Hitachi

 

[neo101]

pull all yer usb leads/dongles out except mouse/keyboard

Then go to device manager scroll down to usb section and delete as many of the hubs and controllers as you can before mouse is cut off

restart pc will 'rediscover' all hubs/controllers and load fresh drivers

start plugging back your usb peripherals one by one as they are rediscovered

might do the trick

 

[Hineshptl]

It isn't a USB problem when I attach the buffalo to the USB it does the same thing as when I plug it into the sata port

 

[neo101]

It isn't a USB problem when I attach the buffalo to the USB it does the same thing as when I plug it into the sata port

Well does hitachi run your operating system or just has data backups/storage on it?

 

[Hineshptl]

no just data
i eventually had a buy a recovery software to get at my data after trying nearly everything