Mac os x fdisk permission denied


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Had issues reformatting the USB to restart the process. I would get the same message: sh I had hard disk errors so i ordered a new one. I read about your solution above, but wondering if it would work on the internal SATA hard drive. I also tried to create a new partition, but it fails too. What model and vintage Mac are you working with? Since you can boot from a thumb drive, your computer will apparently work from an external drive.

I use one from time to time for testing drives. If you are going to end up getting a new computer, the USB 3 model will be sufficient. If your computer is failing no replacement drive is likely to work. You can use any of the drive adaptors for this, though an external drive in a case is probably a better way to go if you intend to continue using the computer for any length of time. Thank you for writing this article.

Recently I upgraded to Yosemite. After few successful back-ups, I decided to encrypt back up. Encryption was going on fine, when suddenly on 3rd day, my MCB mid started ejecting My Book after few minutes.

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After this I tried many things and I think I ended up making it worse. Resource busy This error came during partition after following the steps or Unable to write to the last block of the device. Thank you!

This has helped keep my mental sanity on numerous occasions with corrupted drives. Hi and good day, im having a similar issue with my pendrive. Password: sh Brilliant solution! Running the script, rebooting and then formatting the external hard drive worked for me. Just wanted to say thank you dude! I sure would appreciate any help someone may have. Thank you.

How to fix deep formatting problems with OS X drives | MacIssues

Hi Brad. Have you restarted your Mac with the drive connected? Often when the system sees a drive it cannot recognize it will offer to format it. Does Disk Utility recognize the disk? If so, will it mount when you click the Mount button in the toolbar? Disk utility does recognize but will not allow mount.

I tried to mount it in terminal. It said it mounded but did not show that in diskutil. After doing some research on line I found that the USB flash drive I had purchased was a counterfeit drive. When plugged in it read in disk utility 1TB but would not support the data. It would load the initial folders and the first few would be good, but the rest would be empty. Why does disk utility show an incorrect amount of storage and is there a way to ascertain the correct storage other then just dropping data on it?

Worked the first time and I found this article at the last minute before giving up. Thank you again! As others have said, thanks for all your guidance and congratulations to those who have used it successfully.

Unfortunately, in my case, after following all possible avenues covered in the multitude of ideas here, my situation remains that I have an external Seagate HDD, 1TB FreeAgent GoFlex that no longer works. The current situation is thus:. On the right hand side, First Aid is all grayed out, but Erase is operational. So, I try to erase with the default options, i. I guess that gives me another path to investigate but if you have any new advice to offer, I would be very grateful. Larry, rather than trying to erase the drive, reformat it instead.

Let us know if this works. Hi, Jefferson, this is something I have tried, multiple times. Trying again, this is what happens:. I connected the USB drive to my MacBook Pro, the activity light came on and, after some seconds, started blinking indicating at least communication with the Mac. When I selected Initialize, that window disappeared, the activity light dimmed a bit, the drive disappeared from the DU left hand pane for quite some time but eventually reappeared but still only one line, the name 1 TB SeagateUSB 3. Nothing worked, hence my request for assistance.

I know the easiest thing to do is to simply trash the drive but I hate to do that if there is any chance at all of retrieving it. If it were a smaller drive I might relent but 1 TB is too big to not at least try everything possible before admitting defeat which is something I hate to do. Hi Larry.

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One more thing to try: Before partitioning the drive, try using Disk Utility to unmount it not eject. If this works it should solve the disk is busy problem. DU will try to unmount it in any case in order to partition it. Another possibility: Boot in recovery mode and see if Disk Utility can handle the drive from there. If DU can see the disk, it will still be unmounted and should not be seen as busy. Trying to select anything other than Current in the Partition Layout is impossible. Checking the Erase tab shows everything all grayed out. You did find some interesting facts, however.

Two, that the drive is supposedly almost full. And three, that it appears to contain an OS X base system, which is usually just an invisible boot partition or in some cases can refer to an OS X recovery HD partition. Still, obviously, the drive in non-functional. Do you have access to DiskWarrior? Thanks for all your help.

I thought you might have a friend who has it if you do not, in which case you could check the drive without cost.

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The other reason you might want to get DW is if the data on the drive is important enough to justify the expense. However, from you previous posts the drive does seem to be hosed. I was able to run. Hot damn! It worked! I followed your thorough instructions and bam, they worked! Eventually Terminal showed binary garbage. I was able to run first-aid is disk utility and then format the sd card. That was a nightmare. You can delete the partitions on the drive there very quickly, and then reconnect it to your Mac for reformatting there.

This post has got to be one of the dumbest tech suggestions I have ever read. Why not just wave a rubber chicken over the flash drive too. Perhaps typing insults is the limit of your skill set and actually using a complex process like this one is beyond even your imagination.

In any case, you never get a second chance to make a good first impression—which is to say, you blew it.

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Did that, and a couple of seconds into it the device was unreadable and unusable. Took me a considerable amount of time and searching to figure out how to get it back to a state where I could even try to reformat it, and this particular post actually worked although trust me, the Windows way is MUCH faster and easier. But it certainly had sufficient detail to get my drive working again, without having to incur the cost of an RMA. If you have a better way, or constructive solution of your own, by all means please share it so others can benefit.

So when you tried to encrypt it on the Mac the encryption failed and hosed the drive. If you used Western Digital software to try to encrypt the drive, it too should have warned you.

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If you got no such warning then perhaps I am mistaken about the origin of the problem. If you want or need to use a drive on multiple platforms, the Mac as well as Windows can read and write to a FAT32 drive, which is sufficient for all but the largest thumb drives. Of course, a FAT32 drive will not hold a bootable Mac system. But for data transfer purposes, it works just fine. A nightmare. Too much of their own garbage. A reboot froze half-way through. When I finally was able to boot, the WD drive had disappeared.


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Along with all of the icons for the apps in the dock, and half of them failed to appear.

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