Skip to main content

Mac OS X: Sparse Bundles and backups

  1. Sparse bundles, like read/write disk images, can be encrypted
  2. Create a sparse bundle through the disk utility
  3. The sparse bundle's size on disk corresponds to its content size (which I like, but you may not like that it gives away some information about its insides)
  4. The change password function of Disk Utility (Images->Change Password) does not work through the GUI (the sparse bundle is greyed out and can not be selected). Use the command line instead:
    hdiutil chpass /path/to/Encrypted.sparsebundle/
  5. The sparse bundle is supposed to be easier on Time Machine and other backups, because it is not one monolithic structure.
  6. Resizing the sparse bundle needs to also be done through the command line (GUI greyed out) and is done using
    hdiutil resize -size 1.5g /path/to/bundle
    Where 1.5g is the new size. It will ask you for the password.
Labels:

Comments

Post a Comment

Popular posts from this blog

A note on Python's __exit__() and errors

Python's context managers are a very neat way of handling code that needs a teardown once you are done. Python objects have do have a destructor method ( __del__ ) called right before the last instance of the object is about to be destroyed. You can do a teardown there. However there is a lot of fine print to the __del__ method. A cleaner way of doing tear-downs is through Python's context manager , manifested as the with keyword. class CrushMe: def __init__(self): self.f = open('test.txt', 'w') def foo(self, a, b): self.f.write(str(a - b)) def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.f.close() return True with CrushMe() as c: c.foo(2, 3) One thing that is important, and that got me just now, is error handling. I made the mistake of ignoring all those 'junk' arguments ( exc_type, exc_val, exc_tb ). I just skimmed the docs and what popped out is that you need to return True or
Post a Comment
Read more

Using adminer on Mac OS X

adminer is a nice php based sqlite manager. I prefer the firefox plugin "sqlite manager" but it currently has a strange issue with FF5 that basically makes it unworkable, so I was looking for an alternative to tide me over. I really don't want apache running all the time on my computer and don't want people browsing to my computer, so what I needed to do was: Download the adminer php script into /Library/WebServer/Documents/ Change /etc/apache2/httpd.conf to allow running of php scripts (uncomment the line that begins: LoadModule php5_module Start the apache server: sudo apachectl -k start Operate the script by going to localhost Stop the server: sudo apachectl -k stop  
Post a Comment
Read more