Disk Images and another computer?

Hey everyone,
I recently created a disk image on an external hard drive with my MBP (so I could password-protect sensitive work data). I was wondering if anyone can confirm that if my MBP broke down, I could plug my external drive into ANOTHER Mac and could open the disk image with the same password I've used to protect it? I just want to make sure the disk image is not specific to my one MBP computer. Thanks.

Yes you can.
http://docs.info.apple.com/article.html?artnum=107332
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HT3787 If you accidentally eject that local file (plain white disk image) from another user, can you get it back?

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My website was saved on there. And I need it!!
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That's what I was hoping. I use Time Machine to back up the entire computer. But I'm assuming it was a disk image, and that wouldn't be saved on the backup? Or where could I find it?

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Dear members:
After a disk image is created and saved, how much storage space does one need to work with it ?
Let's say I create a 10 GB disk image that is saved in an encrypted form. Once I try to open it I have first to provide a password and then the drive corresponding to this image mounts to the desktop. Once the drive is mounted, since I have the disk image and the drive, does it mean that I actually have 20 GB added to my desktop folder or both files combined still take up only 10 GB of storage space ?
One other question:
I have saved a disk image to an external Firewire hard disk. When I click on this disk image the drive mounts on the desktop. Is there a way to open this disk image so that the drive is actually mounted on the same external disk where the image is or does it always mount on the desktop independent of where the image is ?
Thank you in advance for your help.
Best regards,
Joseph Chamberlain

Hi, Joseph.
1. You wrote: "In case I wanted to would it be possible to create a disk image on another drive and also mount the disk from this image on that same drive ? For instance, can I create a disk image on an external Firewire drive and then mount the disk from this image on this same external disk ?"I'm not quite sure what you're saying here. I thought I addressed this.
You can create a disk image and save it on an external drive. Double-clicking that disk image (saved on an external drive) will mount it, with the mount point being in /Volumes, same as every other mounted volume on your computer, as discussed in my prior post.
2. You wrote: "On another discussion I initiated one poster said that when creating a bootable external drive it is important to uncheck the square for "Ignore Ownership". I just installed OS X 10.4 on a LaCie 120 GB external Firewire drive and after the installation process noticed that the "Get Info" panel shows the box "Ignore Ownership" checked. Is there a problem ?"You do not want "Ignore Ownership" checked on a bootable volume, i.e. a volume on which you installed Mac OS X. That installation may not work properly.
3. You wrote: "In case there is, shouldn't OS X have unchecked this option as it installed itself on this particular drive ?"I don't know. I've never tried installing Mac OS X on an external volume that had "Ignore Ownership" checked before installation.
4. You wrote: "What does the option "Ignore Ownership" mean and why/when should I use it ?"See "Mac OS X 10.4 Help: I don't have permission to use a disk. The only time I would use this feature is if I had a volume on an external drive, e.g. FireWire drive, that needed to be accessed and written-to by multiple users of the computer to which that external drive was connected. The volume in question should contain only data — not a bootable volume, i.e. one with Mac OS X installed — and one should also be prepared that anyone could add, delete, or modify files on that volume since permissions are ignored when "Ignore Ownership" is enabled.
FYI: When asking multiple questions, numbering them individually is helpful. Then someone can respond by number to link the answer to the question, vs. quoting the text as above.
Good luck!
Dr. Smoke
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Disk Images and External Drives - PLEASE HELP

Hi all,
I've got to a point where i can't afford to keep buying expensive drives to work form with Final Cut Pro X so decided to just work from several high spec drives and then back them up on other cheaper drives, reformat the high spec ones and start again.
Not really understanding how disk imaging works I hoped I could carbon copy mountable and read and writeable drives (in this case a thunderbolt lace SSD) on to a cheaper mass storage, wipe it and start again. I hoped it would then appear on the drives top level just as the drive appears on my desktop, and that I could access it if needed or port it back to a single drive at a later date? Is this possible? Can anyone help? So far everything I've tried has failed.
One thought I did have was to create several partitions on the cheaper mass drive and duplicate it on to there? But I can't find any help or instruction for this online and need to make sure its write before I go deleting old projects.
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None of the back up routines I am aware for for video and large media files use any compression or bundling systems like .dmg. I think your best bet is to make one-to-one copies of your files to your cheap drives. If you need the older projects, you copy them back to your working drives. That's pretty much how it's always been unless you are have a nice NAS RAID with mirroring to another rack of drives.
The problem with cheap mass storage is no that it's unreliable. It's just not QUITE as reliable as more expensive systems. Having a copy of your work on a disk that might or is likely to fail is almost the same as not having a backup at all. but there is a point of diminishing returns for all of us in this business. This trend toward 4k and 8k, and FCPX's inability to manage media efficiently, means we all must add TB of storage for every project. A friend of mine includes a couple of TB drives in his fees. The client pays for and gets the drives.

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To Jan, Greetings
Thank you for your message and for your suggestions.
Is WinZip a Mac application that makes compressed files that can be opened on a Windows computer? If so, then do you have any notion where I could find a version old enough to run on OS 9.2.2?
I noticed that DropStuff 6.0, which I use on my G3 Tower, has an option to make compressed files that are self-extracting on Windows. Do you know if that works? I suppose that I could make such a file and then find somebody with a Windows computer to test if for me.
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/hv

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 DALE

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If anyone else is having this problem, check out the totally awesome post by GNJ to my similar query on the MacFixIt forums:
Drives and Disk Images refuse to mount
http://www.macfixitforums.com/showflat.php?Cat=&Board=tiger&Number=791320&Forum= &Words=CharPatton&Match=Username&Searchpage=0&Limit=25&Old=6months&Main=791320&S earch=true#Post791320
His suggestion to run the 10.4.8 combined PPC update worked like a charm and solved the problem perfectly!
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Thank you!!!

slyfox4 wrote:
Is there anyway to be able to open both of my iPhoto libraries that are backed up on my hard drive with both my computers?
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Unable to delete a disk image and reclaim hard drive space.

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What error are you getting? Are you dragging and dropping on the trash can or right clicking and selecting "Move to Trash"?
Right click on the image file and select get info. What are the permissions set to.
Can you move or copy it to another folder or a external drive and if you can copy it can you delete the copy?

Using a clone image on another computer

I made a clone of my MBP Tiger system using superduper to an external drive before upgrading to Leopard on the MBP.
I also have a Mac Pro running Leopard.
I would like to transfer just my emails in Mail from the MBP clone image to my Mail inbox and sent folders on my Mac Pro.
The rest of the clone doesn't interest me and I plan to wipe it out and create a new clone of the MBP after it is all set up running Leopard.
Migration assistant didn't seem to allow me to do just this so I didn't use it.
Can I connect the external drive with the MBP clone image to my Mac Pro and boot from that without creating problems because it is another computer with different hardware?
Can I then just export those Mail folders and then import them into my Mac Pro's Mail folders?
If doing it on the Mac Pro is impossible, can I boot from the clone with my MBP now that it is running Leopard and export the Mail folders there then just transfer them to the Mac Pro?
Thanks for any advice.

Luis Ortega wrote:
Can I connect the external drive with the MBP clone image to my Mac Pro and boot from that without creating problems because it is another computer with different hardware?
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Disk Images and another computer?

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