I can help you in recovering whole data on 250GB drive, no need to worry its just corruption in partition table.
First of all dont try any repair/data recovery attempt on 250GB disk just leave as its and..
Download "Partition Table Doctor 3.5" here..
Partition Recovery Software: Partition Repair; Partition Undelete; Recover deleted or lost partition.
Now go to rebuild partition table

Select interactive mode for rebuilding partition table..

after completing search select known partition for rebuilding table.

Save and exit PTTD reboot system you did it man gone data is back
Whole process is 15 minute work.

been a linux user i recovered data many times by PTTD.