Mac OS X: external hard drive repair
If your external hard drive first makes a reading error, it is time for a Scan. Before that, you should back up the faulty hard drive but, otherwise data may be lost. For this you will need another hard drive that is equal to or greater.
- Open the disk utility. You can find it under "applications - utilities". Your bad hard drive you should corners now once.
- Plug in your Backup hard drive. They must be formatted in the HFS+ file system, also known as "Mac OS Extended (Journaled)".
- Now select the left of your broken hard drive and go right to the tab "restore". There, you back up the contents of the failed disk on the Backup plate. The source is of course your broken hard drive. As the target media specify your Backup disk.
- When the backup is complete, go back to the tab "First aid". There you will find the Buttons for "verify disk" and "repair disk".
- If it is selected, you can directly use the "repair Volume". Disk utility scans your hard disk and returns you a message. However, if your system disk is the Problem, you need to run the repair in case of a restart.
- The utility reports them irreparable error, then only the Delete and Overwrite with zeros helps. This is in disk utility, under the tab "Delete". Then under "security options" to Overwrite with zeros. Thus, defective sectors are detected and eliminated.
- This is done, you can play your data back. This also goes under "restore", however, you exchange this time, the source and the target medium.
First of all back up data
System hard disk drive failure: Mac OS X does not start
If your system disk has errors, can't you fix this in the current operation. Perform the backup of your hard disk as described above, then it goes on with a reboot.
- Restart your Mac and you are ready to press before the startup sound, press the key combination "Command (⌘) + R".
- Your Mac will now start in recovery mode and displays a menu. Select the disk utility.
- Here, you can now carry out the repair of your hard drive. Use them to repair the "Volume"Option under "First aid".
- Also, here are irreversible errors can be present. Then follow the same process as described above: you will Overwrite the system hard disk with zeros and then back to play the backup copy.
- After such an incident you should consider in a timely manner a new system disk in to consideration the loss of data due to a Defect in the future.
Repair in recovery mode
If you prefer everything from the ground up, read in a different practical tip, as you Mac OS X re-install.
