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10.4: Recover a dead hard drive using GNU ddrescue
The publisher of Diskwarrior, Alsoft, claims that Diskwarrior's directory replacement process won't wipe the old directory until it's successfully written the replacement directory (unless there isn't enough free space for the replacement directory, in which case Diskwarrior will write over the old directory, which can be unsafe if there's a power outage, a crash, etc.), but sometimes, especially on drives that have bad blocks, this guarantee doesn't hold up. Whenever you see Diskwarrior report "Speed inhibited by disk malfunction", it means the drive has bad blocks, and you shouldn't let Diskwarrior try to replace the directory--as mathias01 says, use Diskwarrior's Preview option to Finder-mount the results of Diskwarrior's scan, and copy your files from that preview volume to a backup drive. |
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