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By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up. Time Machine app recognizes the disk and all the partitions but when it attempts to erase the partition a popup message appears saying "MediaKit reports not enough space on device for requested operation".

Whilst nuking the drive using dd will work, it is the nuclear option that doesn't address the problem. I used a Windows 10 installation usb stick to boot my MBP. If u follow the installation proces, there is a point where it ask you to create a clean install. Choose the clean install option. At this point you can delete al partitions on the drive.

That is what I did. I deleted al partitions and did not make a new one. Sorry for my bad English, but I hope it can help someone as it did helped me. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Aug 26, AM in response to asarmiento In response to asarmiento. I read recently that a time machine backup should have its own physical hard disk, not a separate partition on an otherwise-used disk.

I wish I'd known that in advance of buying the external drive, as I would not have invested in a 3TB one if I had known I could only use it for Time Machine alone.

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Dianeoforegon does make a fair point, though, in saying that all backups in one place is asking for problems down the line. Incidentally, this Time Machine problem first started occurring when I upgraded to Mavericks. This definitely hadn't been happening at all before Mavericks.


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That same upgrade also killed off my entire Boot Camp partition, which caused me major headaches and I eventually had to simply reformat that partition and start again. Aug 26, AM. Feb 28, PM. Nov 30, AM in response to johnnymac69 In response to johnnymac You might want to consider starting a new discussion. Since this one is a couple of years old, less people are likely to look at it. A new post would be much more visible. You can link to this one. Nov 30, AM.

This solved the problem.

Fix error - Mediakit reports not enough space on device for requested operation

Segate ships disk with windows and osx installation options for their data protection software, which is not as good as TimeMachine ;-. You cannot delete files using finder. Dumping a bunch of zeros - disk block size x blocks , using dd blows away the first megabyte on the drive resolves the issue. Jun 20, AM. Jun 21, AM in response to asarmiento In response to asarmiento.

[Guide] Solving Media Kit reports not enough space on device for requested operation error!

Jun 21, AM. Just for the record, I have Sierra I then followed the steps shown in the reddit link and it worked like a charm. I have another disk on the way and will try to format it using the steps outlined by samwize7 further down the thread to see if that works too, which is basically.

Aug 24, AM. Nov 15, PM in response to asarmiento In response to asarmiento.

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Nov 15, PM. Nov 18, PM in response to lafalot15 In response to lafalot Nov 18, PM. Dec 5, PM. Dec 14, AM. Communities Contact Support. Sign in Sign in Sign in corporate. Browse Search. Ask a question. User profile for user: asarmiento asarmiento.


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  5. Question: Q: Question: Q: Volume erase failed: Media kit reports not enough space on device I was having problems with the external drive where I store my Time Machine backups, so I tried plugging and unplugging the drive per earlier advice, and something that had worked in the past , but could not mount the drive. More Less. Helpful answers Drop Down menu.

    View answer in context. Mac OS X Speciality level out of ten: 0. Now the free space is 0 and the drive is bricked. Loading page content. User profile for user: dianeoforegon dianeoforegon.