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POSIX error when formatting a DDE on Mac

Ocelot866 -  
 Anonymous user -
Hello,

I have just acquired a Gold Digital external hard drive, it is not recognized by my Mac except in Disk Utility.
When I try to format it, I always get the same error:

Unmounting the disk
Creating the partition map
POSIX reports: The operation could not be completed. Resource busy
The operation failed ...

If anyone has a solution?

Thank you in advance.

Configuration: Mac OS X (10.11.3) / Safari 9.0.3

3 answers

  1.
    dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370
     
    Hello,

    You don’t mention how you format your external hard drive, read this document to properly use the Disk Utility under your OS (El Capitan OS X 10.11)

    https://www.commentcamarche.net/faq/45227-utilitaire-de-disque-sous-os-x-10-11-et-versions-ulterieures

    To format

    When it’s urgent, it’s already too late (Talleyrand)
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  2. Ocelot866
     
    I use the "erase" button because the other buttons are grayed out. I am indeed using the Disk Utility on the Mac.
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    1. dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370
       
      Click on "to format" from my previous message, which I added afterward.
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    2. Ocelot866
       
      I'm doing that, and I keep getting the same error...
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    3. dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370 > Ocelot866
       
      So, from the Disk Utility, you select your external drive, the first line, then from the SOS menu you start a repair of this disk, to see if it's good, you follow the formatting procedure described in the help.
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    4. Ocelot866
       
      He doesn't detect any errors for me..
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    5. dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370 > Ocelot866
       
      Which USB port do you plug it into? It's a USB 3.0 drive with no external power supply, just the USB connection?
      And, which Mac are you connecting it to? You're not providing your configuration; that's a shame!
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  3. Anonymous user
     
    Hello,

    hi dede :),

    The partition scheme may be corrupted. Normally, under OS X 10.11, the SOS button, used after selecting the physically connected disks, should be able to fix the issue. But...

    Otherwise, check KJK555's response here:

    https://discussions.apple.com/thread/2775040?tstart=0

    good luck...

    Have a nice day :-) - Francis
    Always indicate your exact system configuration and read the entire response given.
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    1. dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370
       
      Hi Francis,

      I did tell him to go through SOS, but it seems that it didn't work.
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    2. Anonymous user
       
      Yes, I saw that, that's why I gave the link.

      Since OS X 10.11, there are 2 options to use SOS.

      - After selecting the physical disk

      - After selecting the disk partition. (or one of the partitions).

      When selecting the physical disk to use SOS, it should verify the partition system and its scheme used. But it may fail, especially if the disk is under MBR scheme. This is where the link provides assistance... :)
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    3. dede74000 Posted messages 26996 Registration date   Status Contributor Last intervention   5 370 > Anonymous user
       
      Yes, by going through the terminal, thanks for the info ;)
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    4. Ocelot866
       
      Hello Francis,

      I just followed the steps written by KJK555 and ... It's still not working:
      Started erase on disk2
      Error: -69759: Securely erasing data to prevent recovery failed
      Underlying error: 16: POSIX reports: Resource busy

      I want to clarify that in the Disk Utility, I only see the physical disk; there are no partitions displayed below as there are with the internal disk.

      Thank you nonetheless for your help.
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    5. Anonymous user
       
      Here, I suspect a material defect. A communication issue between the Mac and the disk itself in its enclosure. It could be the electronic component specific to the external disk enclosure itself. Just to be sure: have you tested it with another cable?
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