Are you worried how you can recover data from crashed hfs+ partition ? The Mac system that you are using has the hfs+ file system that is considered to be the most advance. But there will be certain circumstances under which the partition will get damaged and you will lose the access of the files that is stored in it. The corruption can easily be caused if the user has performed a wrong step in creating or merging the partition or user the tool other than the disk utility. When the process is interrupted by any means then also the partition gets damaged and you will have to recover data from crashed hfs+ partition. First of all you should try to repair it with the help of disk utility and if that does not happen then you need to format the drive and make the recovery after that. You can recover the files from the time machine backup that is provided in the Mac system but if that does not work then try using Mac data recovery software. You can easily recover data from crashed hfs+ partition, the software does the full scan of the drive to get the list of lost files that is show in the preview. The selected files are then restored in the drive and recovery is done. So you should download the software now.