I have this old 1TB HDD from a previous device, and it has some partitions that I want to get rid of. I'm trying to wipe the drive completely clean, but my MacBook keeps throwing errors every time I attempt to erase or partition it. I've tried using both the terminal and recovery mode, but nothing seems to work. Here are some of the errors I've encountered:
1. When running First Aid in recovery mode: "Problems were found with the partition map which might prevent booting."
2. "The partition map needs to be repaired because there's a problem with the EFI system partition's file system. (-69766)"
3. Unmounting disk errors, including "Couldn't open device. (-69877)" and volume errors indicating it couldn't be unmounted due to being in use by a process.
2 Answers
It sounds like the HDD might be failing, or there could be an issue with the cable connecting it to your MacBook. Try force unmounting the disk; run `diskutil unmountDisk force /dev/disk2` in the terminal. After that, see if you can erase it again.
I faced a similar situation, and sometimes it can be due to a bad partition map. If force unmounting doesn't work, you might need to consider using a different tool or software to reformat the drive entirely. Tools like GParted can be really effective for this kind of issue!
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