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  1. #1
    Need to reformat backup drive
    I need to reformat my backup drive. Can anyone tell me where I can find out what type format to use? Any help appreciated...

  2. #2
    Need to reformat backup drive
    IWT's Avatar
    Member Since
    Jan 23, 2009
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    Your Mac's Specs
    Late 2015 5K 27-inch Retina iMac, 4GHz i7, 32GB RAM, 1TB Flash Drive, macOS High Sierra 10.13.6
    Welcome.

    Assuming that your Backup (BU) drive is to be solely used for the Mac, the format is OS X Extended (Journaled).

    This also applies if your are using it for Time Machine - in fact, at least for the moment, all Time Machine BUs must be made on to an External Hard Drive (EHD) formatted OS X Extended (Journaled) irrespective of whether your Mac is similarly formatted or formatted as APFS.

    That, I think answers your question. If you need help doing this, just ask.

    As background information, it would be nice to know what Mac you have and what Operating System it has.

    Ian
    Ian

  3. #3
    Hi Ian:
    Thank you so much for the information. I use an iMac desktop with Mojave 10.14.3. When I run a backup I get the message Time Machine couldn't backup to My Passport for Mac because it is a read-only?

  4. #4
    Need to reformat backup drive
    IWT's Avatar
    Member Since
    Jan 23, 2009
    Location
    Born in Scotland, Worked in Scotland then England, Now live in Wales
    Posts
    5,447
    Your Mac's Specs
    Late 2015 5K 27-inch Retina iMac, 4GHz i7, 32GB RAM, 1TB Flash Drive, macOS High Sierra 10.13.6
    Hi again.

    One thing you can do is Right Click on "My Passport for Mac" and choose "Get Info".

    You will see something like this:

    S2.jpg

    Click on the Padlock - Red arrow - it will ask for your Admin Password.

    Then look at the first name (I've obscured it) with "(Me)" beside it. That's your name. Against your name, make sure it says "Read and Write" If not, click on it and change it to "Read and Write".

    Then look at where the Yellow arrow is. Click "Ignore Ownership of this Volume"

    Then Save and click on the padlock to secure the changes.

    That should do it.

    If that doesn't work, you may have to consider reformatting the Drive, losing whatever is already on it. Last resort.

    Please come back if not successful or happy.

    Ian
    Ian

  5. #5
    Need to reformat backup drive
    pm-r's Avatar
    Member Since
    Oct 16, 2010
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    Brentwood Bay, BC, Canada
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    11,262
    One thing you can do is Right Click on "My Passport for Mac" and choose "Get Info". ...

    Which begs the question, what were the permissions when presumably it was working as a backup previously:
    I need to reformat my backup drive.
    Hmmm...??? Or maybe it's a brand new drive eh??



    - Patrick
    ======

  6. #6
    Need to reformat backup drive
    Randy B. Singer's Avatar
    Member Since
    Feb 01, 2011
    Location
    Sacramento, California
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    1,518
    Quote Originally Posted by Shelbyw7 View Post
    I need to reformat my backup drive. Can anyone tell me where I can find out what type format to use? Any help appreciated...
    There is a very detailed (and illustrated) set of instructions on the Bombich (makers of Carbon Copy Cloner) site:

    Preparing your backup disk for a backup of macOS | Carbon Copy Cloner | Bombich Software
    Randy B. Singer
    Co-author of The Macintosh Bible (4th, 5th, and 6th editions)
    Mac OS X Routine Maintenance http://www.macattorney.com/ts.html

  7. #7
    Many thanks to you all. I did reformat the drive, and did a backup last night. Everything seems to be working fine now. I will be ordering a new backup drive. Thank you again so much!

  8. #8
    Need to reformat backup drive
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
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    Quote Originally Posted by Shelbyw7 View Post
    Many thanks to you all. I did reformat the drive, and did a backup last night. Everything seems to be working fine now. I will be ordering a new backup drive. Thank you again so much!

    I'm not denying the importance of sometimes having a second Backup Drive, but is this the reason you are ordering a second new backup Drive?

    Just curious.



    - Patrick
    ======

  9. #9
    Hi Patrick:
    Yes, that is the reason. But I will probably find other uses for it also.

  10. #10
    Need to reformat backup drive
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
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    11,262
    Quote Originally Posted by Shelbyw7 View Post
    Hi Patrick:
    Yes, that is the reason. But I will probably find other uses for it also.

    I'm sure you will Shelby, and excellent planning and data loss prevention on your behalf.


    - Patrick
    ======

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