Inconsistency between Disk Utility and Info page

Discussion in 'Apple' started by carlos, Jan 11, 2012.

  1. carlos

    carlos Guest

    On a Mac Pro running under 10.6.8, inserted a
    USB formatted with Mac Standard under Mac OS9 on
    an older titanium Mac Book G4.

    Disk Utility says Write Status: Read/Write.

    But the Info page displayed by control-I says

    Sharing and permissions: you can read only
    and that cannot be changed

    Why the disconnect?
    carlos, Jan 11, 2012
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  2. carlos

    JF Mezei Guest

    This is at the hardware level. The disk doesn't have a write-disable
    jumper set. (or in the case of non rewritable CD/DVDs, those would be
    read-only by nature).

    This deals with file system security. Which users have access to which
    files. Normally, you should be able to click on the "lock" symbol, it
    will prompt you for your administrator password, after which you can
    change the file security to grant you access.
    JF Mezei, Jan 11, 2012
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  3. Disk Utility is telling you that the drive is writeable, but Finder is
    telling you that file permissions are set up to stop you doing so.
    Meaning that Disk Utility could reformat the drive if you wanted, but
    that until then Finder isn't going to touch it unless you can change the
    permissions on it.
    Tom Harrington, Jan 11, 2012
  4. carlos

    Guest Guest

    that won't help at all.

    he said it was formatted as mac os standard (hfs) as opposed to mac os
    extended (hfs+). standard hfs is read-only.

    the only solution is to copy the data, reformat it as hfs+ and then
    restore the data, unless he doesn't mind being restricted to older
    Guest, Jan 11, 2012
  5. carlos

    carlos Guest

    Actually I solved the problem by trial and error. On the old
    PowerBook G4
    I erased the USB with Disk First Aid (after turning off File Sharing).
    OS X is happy: the triangle was back and I could reset the

    Note that reformatting with HFS+ is a mistake: the PowerBook would
    say that the USB is unreadable. Formatting with DOS also works on both
    systems but contaminates disks with invisible files like .DStore
    carlos, Jan 11, 2012
  6. carlos

    Guest Guest

    what system is the powerbook running?

    macos 8.1 or later supports hfs+ and should be able to read the usb
    stick. earlier macos versions will only see the hfs wrapper volume
    which contains a text file that explains why you can't see any files.
    it will probably work best if you format it hfs+ on the earliest system
    you have.

    you can format the stick for fat32 on either a mac or windows system,
    but you will be limited to a maximum file size of 4 gig.
    Guest, Jan 12, 2012
  7. carlos

    carlos Guest


    refuses to read any stick formatted by OS X Disk Utility, except DOS/
    "disk is unreadable"
    carlos, Jan 12, 2012
  8. carlos

    Guest Guest

    did you format hfs on the 9.2.2 machine or in osx?
    Guest, Jan 12, 2012
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