disk erase failed could not unmount disk

This is the first 'Macintosh HD' in picture 1. The logical volume 'Macintosh HD' (967.8 GB) spans disk0s2 and disk1s2. The rest is reserved for EFIs, a Recovery HD (alltogether ~1.3 GB) and your old Windows partition - now probably free space (~152 GB). The larger parts of your SSD (disk0s2) and your HDD (disk1s2) are pooled to a CoreStorage LVG (Fusion Drive: disk3) with a size of 967.8 GB. Disk0 is your SSD with 121 GB and disk1 is your HDD with ~1 TB (~1.121 TB summed up). Theoretically everything is fine with your Fusion Drive. ATTENTION - UPDATING MASTER BOOT RECORD. Read-Only Volume: Not applicable (no file system)įdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory Volume Free Space: Not applicable (no file system) Volume Name: Not applicable (no file system) fdisk doesn't do anything.Īny ideas how to fix a disk that is this severely screwed? -bash-3.2# diskutil listġ: Apple_Boot Recovery HD 650.0 MB disk1s1Ģ: Apple_HFS Mac OS X Base System 1.3 GB disk2s2ĭevice / Media Name: Corsair Performance3 SSD Media

When I attempt to run fdisk to correct the MBR. I get an 'error 6988 couldn't unmount disk'.

Now in Disk Utility, sometimes I see the SSD drive and sometimes I boot and it's not there but I can never erase or partition it.

I erased the SSD drive in my MacBook and was reinstalling Lion when it failed about 75% through the install.

Disk erase failed could not unmount disk