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Somehow my harddrive seems to fail, I am not able to startup anymore. When I started in verbose mode, I noticed that the harddrive return I/O Errors and the B-Node-Tree seems to be corrupted.

I was able to use the single-user mode to backup files to an external harddrive, but when I tried to repartition the harddrive from the recovery mode, after failing to repair the partitions in single-user mode, I get an error, that he is unable to unmount the drive.

(DiskWarrior 4.4 doesn't even recognize the Macintosh HD and the S.M.A.R.T Test results are alright)

I first thought maybe something is actually used on that drive, but even after trying to repartition from the Disk Utility on a Mac OSX Lion Installer DVD, he keeps telling me, that he is unable to unmount the drive.

(I had a bootcamp partition on the harddrive as well, that is still highlighted, so that seems to be the issue)

The system is an early 2011 MBP.

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1 Answer 1

Open Terminal and try entering following:

df

which will give a listing of your mounted volumes similar to:

Filesystem    512-blocks       Used  Available Capacity  Mounted on
/dev/disk0s2  1951845952 1655141456  296192496    85%    /
devfs                477        477          0   100%    /dev
map -hosts             0          0          0   100%    /net
map auto_home          0          0          0   100%    /home
/dev/disk1s2  1952853344  754604936 1198248408    39%    /Volumes/Backup

depending on which drive you need to unmount you can then try:

sudo hdiutil eject -force /dev/disk1s2

which would force /Volumes/Backup to be unmounted.

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