It is recommended by experts to back up the data before the partitioning of Mac drive is done. This is helpful in preparing the system preventing data loss, because of situations like power failure or the hard disk failure. There may be data loss because of the use of Professional software needed for partitioning of the Mac drive. There are many reasons for the partitioning of the hard drive. Partitions allow us to operate on multiple operating systems.
Data backup can always help to overcome such adverse conditions like hard disk failure and virus infection, leading to a data loss scenario. The formatting of the hard drive or the creation of a new partition always requires a backup. The Disk Utility feature of Mac OS X actually helps in the creation of a new Mac disk partition on the hard drive, which is existing. However, a full system backup needs to be taken before this new partition is created. A full system backup includes documents, videos, images, audios and more. This system backup is to ensure that nothing goes wrong. There is the Time Machine option for taking a complete backup of the system. This is the backup server included with the Mac OS since OS X 10.5, for the current backup of all the important data. We can proceed with the partitioning, once this task is finished.
The file system for a Mac OS X is HFS +, which stores different types of metadata and data. The various attributes of data that are stored by this file system are permission and ownership, creation date and the access control list. A locally attached HFS + formatted volume, if we want to back up the system files only. But this HFS+ formatted destination volume is not required when the data other than the system files are being considered. Just like the hard drives in Windows are preformatted with the FAT32 file system, in case of Mac the GUID Partition Table Scheme (GPT) is used for hard drives, for the purpose of the booting up of the system. The partition scheme shows the analysis of the volumes in the hard disk. There is only one partition scheme for a hard drive but more than one volume.
The need for the backup leads to the use of the hard disk partition software being used along with backup utilities. We need to have an additional software for backup, in case the backup utility is not present.
One may delete the operating system, while resizing the partition. We need the backup for this reason. Another reason for the backup is the creation of the bootable rescue CD. If the operating system fails to boot, then this required for the booting up. There are some partition manager software, which comes equipped with features to aid in the creation of the boot rescue CD.
The partitioning process actually alters the way the data is stored on the drive. Anything can happen like dog tripping over the power cord or the unplugging of the Mac. We need to be prepared for the worst scenario and backup the data, before starting with anything else.
Sometimes the user may encounter the following error:
Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
When we get this error, we try to repair the system, without the Time Machine or any appropriate backup system. With a proper backup in place, a good option is reinstallation. If there is no backup, then we need to repair/ recover by using a special software and then have at least a good backup.