Camarillo Brillo
Level 1 (50 points)

Q: Is it possible to do a 'force formatting'?

I decided to erase the external USB HD I was using for Time Machine. I used TM with a password.

 

Well, when I opened Disk Utility, it asked me for a password twice.

After I gave the password and clicked ERASE, I wasn't able to acess my external USB HD anymore.

 

Disk Utility recognizes the external HD, however, it will not mount an icon on my Finder.

 

I am able to Verify and even Repair my external USB HD, but I don't see the erase tab anymore.

 

The USB HD is working perfectly well, I hear the spinning sound and the little blue light lights up.

 

I tried diferent ports and switching cables. No go.

 

Thanks in advance for your help

MacBook Pro 17, Mac OS X (10.7.1)

Posted on Sep 16, 2012 8:03 PM

by Camarillo Brillo,Solvedanswer
Camarillo Brillo Camarillo Brillo
Level 1 (50 points)
A:

Wow, this seems to be the solution indeed! I'll try it tomorrow and let you know what happend.

Thanks buddy

Posted on Sep 16, 2012 10:27 PM

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Camarillo Brillo

Q: Is it possible to do a 'force formatting'?

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  • by zenjosso,

    zenjosso zenjosso Aug 1, 2014 11:18 AM in response to LousyFool
    Level 1 (0 points)
    Aug 1, 2014 11:18 AM in response to LousyFool

    Hi, I used this technique and got the following

     

    Started erase on disk1

    Unmounting disk

    Error: -69877: Couldn't open device

     

    Have you seen this before and could you help?  You seem very knowledgeable

  • by acalle,

    acalle acalle Sep 4, 2014 11:11 AM in response to den.thed
    Level 1 (0 points)
    Sep 4, 2014 11:11 AM in response to den.thed

    PLAASEEEEE HELPPPP


    I cant reinstall my macbook air.


    I got it from my mother and she had erased all. Don´t know hoe though.... Now , when Mac os x Utilities opens, a Reinstall os x  showing lion icon, I try to do so and when asking to connect to my apple id account says temporarily unavailable. I suppose because Lion is not longer available at app store...


    Now, I have Mountain lion installation disks, can I use them? When I try to use them the computer doesn´t recognized them when asked from where to install....

  • by Christendean,

    Christendean Christendean Jan 31, 2016 9:51 PM in response to LousyFool
    Level 1 (12 points)
    iCloud
    Jan 31, 2016 9:51 PM in response to LousyFool

    Hi  LF, 

     

    I've tried to follow your  instructions,  as I'm having the same problem with  my  WD Elements 1042 Media  external.
    I'm using  a  late  2011 model MacBook Pro  on  EL  Capitan

     

    The result i get when  attempting to erase from terminal is:  Error: -69877: Couldn't open device.

    Do you have any advice or solution?

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