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4. Run Disk Utility (in /Applications/Utilities ). Select your internal
disk in the list on the left. In the First Aid view, click Repair Disk.
Disk Utility attempts to fix the disk. If it succeeds, you can restart
your computer right away, and you'll automatically go back to using
your internal disk. If Disk Utility is unable to repair the disk, you
have three options:
Try a third-party disk repair utility, such as Alsoft's DiskWarrior
Erase the internal disk and then reverse the duplication process.
Restore your entire disk using Time Machine (or another backup
program, if you created a versioned backup of your entire disk).
If you decide to take the second route—restoring your disk from
a bootable duplicate—read on for instructions. For help restoring
an entire disk from a Time Machine backup, refer back to Restore a
Disk Using Time Machine .
Restore a Disk from a Bootable Duplicate
If your internal hard drive has become so badly damaged that it
can't be repaired by disk utilities—or if your hard drive, or your entire
Mac, had to be replaced—your best bet is to erase the drive and then
restore its entire contents. Although you can restore your disk from
a Time Machine backup, the process usually takes a very long time—
and of course it won't include any files you excluded from Time
Machine. A better bet, assuming you have a functioning and up-to-
date bootable duplicate, is to restore your disk from the duplicate.
To restore the contents of your bootable duplicate to your internal
disk, follow these steps:
1. Follow Steps 1-3 under Use Your Bootable Duplicate (earlier in this
chapter) to start up from the duplicate.
2. Open Disk Utility (in /Applications/Utilities ).
3. Select your computer's internal disk in the list on the left.
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