![]() In my case, I’d booted from disk1 and the SpinRite target disk was disk0.ĭetermine the correct disk identifiers with: It is critical that you identify the BSD device name for the whole disk that you want to operate on. It’s certainly not an ideal situation to have to pull the plug on the computer while that VM has raw access to your target disk! Identify the Target Disk ![]() Turn off screen savers, sleep timers and screen lock, just in case the VM has taken keyboard input away from you and you are unable to unlock the Mac to check on SpinRite’s progress. ![]() Make sure you have VirtualBox installed, with the optional Command Line Tools. I use SuperDuper to make bootable backups, and these work great for this purpose too. You’ll need a working MacOS install on another disk that you can boot from, as we need to unmount all the volumes on the disk to be scanned in order to gain raw access to the disk. All contractors must report to the site office. Hard hats must be worn beyond this point. Obviously, I do not accept any responsibility and cannot help if you break things by using these notes. Performing the wrong operations when you have raw access to the disk, a technique this process uses, can cause you to lose data.
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