My hard drive died in my macbook and it no longer will start up. It will not mount in an external enclosure but disk utility is still reading that the hard drive is there, and I tried to repair disk and I am getting this 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.) So my question is how do I backup my files if the hard drive won't mount? The only way that I have been able to see the hard drive is through disk utility. I just want to be clear that I am using mac os x snow leapard.
You could try following this hint from Macworld. It makes use of the Terminal (0$) to execute the UNIX command
dd to copy everything bit-by-bit from your harddrive to another location.
1. Determine UNIX id. of dead drive
If you decide to use this method you would first have to determine what the UNIX identifier of the attached disk is. Open up Terminal (Applications --> Utilities) and type the following:
This will give you a list of all connected drives and their partitions and it should look like shown here.
Probably your boot drive is under
/dev/disk0 and the drive in the external enclosure is under
/dev/disk1. This could be different, look this up by finding the name of the dead partition in the list. Let's assume for the rest of this answer that the dead drive is under
Now if you can not find the name of the dead drive in that list,
diskutil can not find your drive and the Macworld hint will not work for you. If you see it in the list, move on to the next step.
2. Define destination
This method copies the whole disk byte-by-byte. If it encounters an error it will skip it and write zeros to the destination (read the hint for full details). So, the destination should have enough hard drive space to accomodate the whole hard drive you're recovering. So if you've got a 320GB hard drive, you'll need 320GB of destination space. If you have 320GB to spare on your bootdrive proceed to step 3. Otherwise get another external drive with at least 320GB of space and then proceed to step 3.
The command given in the hint is:
dd bs=512 if=/dev/rXX# of=/some_dir/foo.dmg conv=noerror,sync
You should replace
/dev/rdisk1 (according to our earlier assumption) and
/some_dir/foo.dmg differs depending on your destination. If you choose your bootdrive you could change that line to:
If you choose an external disk you should write
/Volumes/**Volumenamehere** instead of
To summarise, your Terminal command would look as follows if you choose your boot drive as destination:
dd bs=512 if=/dev/rdisk1 of=/Users/yourusernamehere/Desktop/recover.dmg conv=noerror,sync
Or if you choose an external disk:
dd bs=512 if=/dev/rdisk1 of=/Volumes/Volumenamehere conv=noerror,sync
That requires opening the MacBook, unplug the harddrive, move the drive to a PC and attach it to a SATA connector on the PC motherboard.
Then start the PC using a Spinrite created bootable CD-ROM/floppy/USB stick.
When Spinrite its default level 4 (data recovery) fails, start at level 1, then run the next round on level 2, 3 and finally run spinrite at level 4.
Hard Disk Recovery or Hard Drive Recovery must be done by professional only.There are a variety of issues that can arise that can cause or lead to the malfunction of your hard drive. These problems are such that they can manifest themselves over a period of time or can happen suddenly, rendering your hard drive completely inaccessible.
You must log in to answer this question.
protected by Community♦ Dec 26 '14 at 11:12
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?