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Recover a dead hard drive using dd
This is a great hint and I'm preparing to rescue a failed PowerBook drive like this, but how do you get the drive connected to a Mac in the first place? I've put my dead drive in an external USB enclosure, but when I plug it into the Mac, OS X insists on trying to mount the drive. Since the disk seems to have errors in the volume definition areas, this fails and eventually the drive just spins without reading. OS X never mounts it and I can't do anything with it.
Recover a dead hard drive using dd
I put mine in FW enclosure. It never mounts. Depending on the phase of the moon, the fire wire bridge chip will reported it as a unformatted drive or will refuse to work with the disk at all. In the latter there is no way you can use this scheme in ext. enclosures at least. Put it back in the original machine, boot it up from external and try again.
How long will it take?!
And with "forever" you mean?
How long will it take?!
Depending on the number and severity of errors on your disk, absolutely. 30 days might even be optimistic. In reality portions of your disk are probably still good and will read very quickly, but the errors slow the whole process down.
How long will it take?! / Done, but it won't mount!
Just as you said, it was only certain parts of the drive that took that long, the rest went much quicker. It's ready now.
Recover a dead hard drive using dd
btw, the terminal command df -k will list the UNIX device name along side the actual mount point (aka. the "real name" for us human beings). Of course the Root drive doesn't have a real name, it's just /
eg.
[me@mycomputer:[~]$] df -k
Recover a dead hard drive using dd
If you are running 10.3.x you can disable the diskarbitration daemon to prevent devices from being mounted. Simply rename disarbitrationd to something easy to remember and reboot. Just change things back when you are done. |
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