Disk Utility formats questions

Brooklynguy · Brooklynguy #1 (**permalink**)

05-27-2013, 12:50 PM

I have some personal dvd's that i saved off onto our iMac using the DVD/CD Master (.cdr) format for each disk.
Now I want to put all the .cdr's into a compressed disk on the iMac HD. This will have other .cdr's added to it time to time, so it must be expandable.
Which might be the best format to use? I was considering the Sparse Bundle Disk Image but not sure if this actually compresses and expands or decreases in size depending on content. What about .dmg or .zip? All ideas would be appreciated.

mrplow · mrplow #2 (**permalink**)

05-27-2013, 05:39 PM

Your disk images aren't going to compress much more than they are already, so I doubt there's much mileage in compressing them further. You can test this by zipping a cdr and comparing the cdr file size with the zip.

Is there any particular reason you want to put them in another container?

Raz0rEdge · Raz0rEdge #3 (**permalink**)

05-27-2013, 06:02 PM

Compressing a compressed file usually results in a larger file than the source. You can indeed use something like a ZIP to just keep all of your CDR together, but expect that ZIP file to take up more room. You're better of keeping a folder structure that you can use to organize your CDRs..

Brooklynguy · Brooklynguy #4 (**permalink**)

05-28-2013, 11:44 PM

Thank you both for your advice.

Quote:

Originally Posted by mrplow

Your disk images aren't going to compress much more than they are already, so I doubt there's much mileage in compressing them further. You can test this by zipping a cdr and comparing the cdr file size with the zip.

Is there any particular reason you want to put them in another container?

First I was considering using the Time Machine to backup the CDRs onto my external disk drive. But that means I'd have to reconfigure the "Exceptions" each time I wanted to run one disk or the other. (Time Machine does its backups onto my Time Capsule disk. The CDRs will be on an external LaCie disk drive I have.

The reason for thinking of a compressed container for the CDRs was to save further disk space as the CDRs can be quite large in byte size. But, since it will not be to any advantage, I will just use a folder structure, possibly by author_name/audiobook_name. Thanks again for getting back to me on this.

Brooklynguy · Brooklynguy #5 (**permalink**)

05-30-2013, 08:33 AM

I hereby state that this thread should be closed.

BG

mrplow #2 (permalink)
Member Since: Oct 01, 2007 Location: UK Posts: 6,758 Mac Specs: 27" iMac i7 (2011) 10.10, iPhone6, iPad Air 2, AppleTV2	05-27-2013, 05:39 PM Your disk images aren't going to compress much more than they are already, so I doubt there's much mileage in compressing them further. You can test this by zipping a cdr and comparing the cdr file size with the zip. Is there any particular reason you want to put them in another container? External hard disk acquisition addict - but admitting the problem is the first step to a robust backup Please use the reputation system if you think you've been helped - top right of this post
	QUOTE Thanks

Brooklynguy #5 (permalink)
Member Since: Oct 17, 2011 Location: Born in Brooklyn, bred in Manhattan, living in Vermont Posts: 75 Mac Specs: iMac, 27-inch, Mid 2011, 2.7GHz Intel Core i5, 4GB 1333MHz DDR3, AMD Radeon HD 6770M 512MB, OS10.10.	05-30-2013, 08:33 AM I hereby state that this thread should be closed. BG 2007 Ford Mustang GT/CS black convertible, 5 on-the-floor, 300-horsepower 3-valve 4.6-liter V-8.
	QUOTE Thanks

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Brooklynguy #1 (permalink)
Member Since: Oct 17, 2011 Location: Born in Brooklyn, bred in Manhattan, living in Vermont Posts: 75 Mac Specs: iMac, 27-inch, Mid 2011, 2.7GHz Intel Core i5, 4GB 1333MHz DDR3, AMD Radeon HD 6770M 512MB, OS10.10.	05-27-2013, 12:50 PM I have some personal dvd's that i saved off onto our iMac using the DVD/CD Master (.cdr) format for each disk. Now I want to put all the .cdr's into a compressed disk on the iMac HD. This will have other .cdr's added to it time to time, so it must be expandable. Which might be the best format to use? I was considering the Sparse Bundle Disk Image but not sure if this actually compresses and expands or decreases in size depending on content. What about .dmg or .zip? All ideas would be appreciated.
	QUOTE Thanks

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