Why do disk image?

I just burned a DVD made up from iMovie. Why would I want to make a disk image now? I can just do it anytime, right?
And if I want to do a little bit of changing--From archived posting I will be able to read the DVD with
"get for 20$ the Apple mpeg2 plugin
and for free the tool Streamclip
http://danslagle.com/mac/iMovie/tips_tricks/6010.shtml
http://danslagle.com/mac/iMovie/tips_tricks/6018.shtml"
iMac G5 Mac OS X (10.4.7) 160 GB internal, 320 GB and 1TB external hard drives

Hello RiverLover,
lyn Fairlie pointed you in the right direction as to why you should create a disk image. To add to this, in iDVD it is not possible to control the burn speed, which is crucial to successful burning.
And if I want to do a little bit of changing--From archived posting I will be able to read the DVD with "get for 20$ the Apple mpeg2 plugin and for free the tool Streamclip"
You can extract video files from a DVD using MPEG Streamclip, but it's not really an advisable technique for making changes to your (already burned) DVD.
Extracting video from DVD means converting from MPEG-2 to DV, then back to MPEG-2 for DVD burning, which means loss of quality - and the structure of the actual DVD is not being preserved. If you want to make changes to an iDVD project, it's better you do so in iDVD (before deleting that project - and the original footage).
hope this helps
mish

Similar Messages

HT1198 why a disk image on user/shared, rather than just a folder in that location called iPhoto?

surely if iPhoto is a regular shared folder in user/shared then there wont be time machine backup issues as with a disk image?

Because the disk image's permissions can easily be turned off and kept that way. Doing that with a regular shared folder would require that they be reset each time a different user accesses it.
(76621)

How do I mount a disk image that won't open?

I have an external drive Samsung 500 GB that was failing. I think my MacBook Air (10.6.8) caused it to fail because it wouldn't allow me to eject the disk even though I forced quit all programs. I eventually had to just unplug the drive and this caused the external disk to fail as it had not been ejected properly. Not my fault. It's the MBA's fault for not letting me eject the disk. Now the Samsung disk won't mount properly and I get a message that the drive is failing and I should save the data.
Anyhow, I used the free version of Data Rescue 3 to try and save the data on the failing Samsung 500 GB drive and move it onto a brand new Toshiba 1 TB drive.
I was unable to use the normal scanning function of Data Rescue 3 as the hardware of the drive was too damaged, and so I used the clone function on Data Rescue 3 to clone the data onto a non-failing hard drive, with the intent of restoring the data later.
I am not sure if I was successful in making the disk image. It hung up at the 99.6% point for about 12 hours when I decided to give up on it, and I shut down Data Rescue so I could eject the hard disks.
However, it would not let me do it. I tried force ejecting but still I could not eject the disks.
I ended up just unplugging the drives. I think the Samsung drive died almost completely then because it made a whole lot of clicking noises after that (it was only making a few clicking noises before that).
Anyhow, I plugged the Toshiba 1 TB drive into the computer again and used Data Rescue to scan the drive with the disk image on it to see if I could detect files on that drive.
It opened up the structure and I was able to see that most or all of the files were there (abbout 450GB of data) just from seeing the information about the files in the structure tree - the labels of the files (file type labels such as jpg, mp4 etc) and the size of the files, although I could not open up the files to check all of them.
I tested out the restore function of Data Rescue by downloading one file (<10MB) file. I am using the free version and can download one file for free to test things out.
It worked and I was able to save that file onto a second external drive (Western Digital 500 GB) I had plugged in. I had bought this drive just to do the data rescue.
So I think the files are salvageable and the disk image is OK.
However, when I tried to open the disk image in Disk Utility, by opening it as the source and choosing the WD drive as the destination I could not open it. I got an error message. I can't remember what the message was.
I tried just opening the disk image in Finder by just clicking on the disk image but it won't mount.
Is that because my hard drive doesn't have enough space? My Desktop on the MBA only has 12 GB free and the WD drive has only 500 GB on it even though the disk image is about 501 GB.
I don't know why the disk image is that size when the failing Samsung drive only had 450 GB of data on it.
Anyway, what should I do to mount the disk image?
I want to mount the disk image so that I can copy or move the files from it to another external drive so that I can save those files.
Is it because the WD is only 500 GB or does it mean there's a problem with the disk image I made?
Should I try Carbon Clone Copy? I use that to make backups of my MBA internal HDD though I have never used it for opening or making disk images.
I have never dealt with disk images before except for dmg files of applications downloaded from the internet.
I am trying to avoid using Data Rescue 3 as I have to pay for it and if there is a free option, such as Disk Utility, CCC or other, I want to try it to restore the data in the disk image.
Sadly, I think the Samsung drive is ruined beyong repair as it's making a lot of clicking sounds and doesn't mount properly in Disk Image and I get a message that it's beyond repair or something like that in Disk Utility.
So I am relying on the disk image I made on the Toshiba drive to restore my files.
(I think it was the last movie file that caused the problem because it was when I was trying to copy it onto the Samsung external drive, all the problems began - hanging up when copying it, not being able to eject the Samsung disk, causing hardware issues on Samsung disk and getting warning messages on Disk Utility.)
BTW, I learned how to eject a drive when it won't eject the normal way, I have to use command window and type in commands, but that's another post ....
Any advice?
I am thinking of going out and buying a second 1 TB external drive so that I have a disk with enough space to open the 501GB disk image on it, just in case that was the sole problem.
However, I am not sure that is the case, and I think there may be a problem with the disk image or I am not going the right way about opening it.
Thanks for any advice.

I think I've found the solution to this problem.
http://superuser.com/questions/19426/im-unable-to-mount-a-dmg-getting-a-no-mount able-filesystems-error
I am following the instructions here:
I ran into a similar situation. I did what simonair suggested and I received a message in Terminal that Volume mounted successfully. However It did not help me access the mounted Volume neither was I able to confirm the mounted Volume. Nor was I able to mount the image using Disk Drill or even scan through. Nothing succeeded.
Here is what I did to solve my problem. I see that in this post some suggested that we should convert name.dmg to writable file. I used the command from Terminal to convert but was not successful. INSTEAD alternatively, I used Disk Utility, attached the Volume (yes I got the same message again, ''no mountable system files'' however, Disk Utility nevertheless attached the image, which I was able to do before anyways. This time, I selected it and then clicked New image, and then selected image format read/write, not the compressed option. I created a new image. This time this image was writable however, it still would not mount using Simonair's solution. However, this time I was able to scan it with Disk Drill with exact file locations and folder hierarchy as I had. Recovering all from thereon was a breeze. Just remember: when you create new image of an attached volume and chose not compressed but read/write, you need to have a disk with exact amount of space that totals the total space allocated within that name.dmg file (not the amount of space the data takes). Mine was huge, and luckily I had an external disk with enough space to do that and it took about 5 hours for about 400GB of disk allocation. Good luck.
And so far it seems to be working. Even though the volume is grayed out on the left side of Disk Utility, I am still able to select it as the source for making a new disk image. I chose Read and Write and no compression.
The only thing I might be doing differently is that instead of choosing the disk image as the source, I chose the volume as the source. The volume is grayed out, but the disk image is not.
It seems to be working all right. Keep my fingers crossed.
If this doesn't work, I will use Data Recovery 3 as a last resort.

Disk Image Setup on Time Capsule

I currently use my 2TB Time Capsule as a backup for one laptop and for my iTunes media files (which I periodically back up to an external hard drive manually). I'm planning on adding my wife's laptop's backups to the mix and would like to reserve room for the growing folder of music plus other data files. After some research, it appears that the best way to keep Time Machine from filling all available space with backups from our computers would be to use disk images. I'm considering two different tactics:
1. Create a disk image with a capacity of, say, 1TB to which I'd move the library (I'm assuming that Time Machine will respect the capacity even if the image isn't full, right?). The issue I have with this is that I don't want it to affect how iTunes accesses the files wirelessly. Is there a particular way I should create the disk image so that iTunes simply access the files as it does now (i.e., no encryptions, passwords, turning into sparsebundle files, etc.), but also maintains the capacity in such a way that the backups won't encroach?
2. Keep the library in its existing folder on the Time Capsule, but create a bunch of empty disk images that will keep the sparsebundle backups from encroaching. I could then delete the empty disk images as the need for room increases in the library.
Any thoughts on the best way to do this, or on showstoppers I haven't thought of? Assuming either approach works, I'm also looking for advice on format, partition, and image format specifications for setting up the disk image(s) in Disk Utility. I'm assuming I can avoid the encryption/password problems by simply leaving encryption marked "none."

daveb74 wrote:
if I were going to use one of these drives as my primary iTunes media location, I'd either have to leave it plugged into the TC all the time or manually attach it every time I wanted to access those files. The former seems like a bad idea
Not really. Running constantly is one of the least-stressful things that a disk drive can do, much easier on it than regular starting and stopping.
Do you know of any reason why the disk image idea wouldn't work, specifically?
I wouldn't put your iTunes files into a disk image unless you were sure you were only going to mount that disk image from one Mac at a time. I'd expect the mounting of a read-write disk image on multiple Macs to cause trouble.
Putting empty disk image files on the Time Capsule disk would accomplish what you're trying to do (reserve space so that Time Machine doesn't consume it all), but that requires a fair amount of management on your part to monitor the space usage.
If you decide to go with disk images, be sure that you don't use a "sparse" variety. You want the type that initially reserves the entire amount of requested disk space.

HT3275 Hi, I have backed up 2 IMACs and one Mac Book Pro but for some reason, the 3rd IMAC come up with this problem: The backup disk image "/Volumes/Data/Anthony's iMac.sparsebundle" could not be accessed (error -1). Why? They computer system is up to da

Hi, I have backed up 2 IMACs and one Mac Book Pro but for some reason, the 3rd IMAC come up with this problem: The backup disk image “/Volumes/Data/Anthony’s iMac.sparsebundle” could not be accessed (error -1). Why? The computer system is up to date and I have had no issue with the other computers, just this one.
Many thanks
Anthony

Try this Discussion...
https://discussions.apple.com/message/18783684#18783684

Why archive AVCHD as disk images, versus .MOV or .MP4?

I get an interesting array of responses to this everywhere I ask...but most of all I'm curious about the opinions of folks who specifically use FCPX for editing, so I'd greatly value your feedback.
Like many folks who have been shooting AVCHD for a while, I now have many years worth of footage from a variety of cameras stuffed into my backup/archive workflow. For all those years, I've been keeping perfect disk images (generally non-compressed, read-only .dmg files created in Disk Utility right off cards and cameras) of every single one of those AVCHD shoots. In the early days of the format, when support was far, far more twitchy and frustrating than it is today, I felt it made sense to have a little "healthy" paranoia.
These days, however, I wonder if this isn't a colossal waste of time and storage space?
Here's the thing about this method...nothing ever gets deleted. You end up sucking every little take, every borked shot, every mishap, into your diskspace, cloud storage, tape library, or whatever you use for archival, forever. When I stop to think objectively about this, it seems nuts. I mean, if I did this with photography, my photo library would be 2x to 3x its current size and full of garbage. It would also be hard to navigate, which come to think of it is a major annoyance with all my AVCHD disk images. I keep them well organized, but still, having to mount them to look through videos (and then having to climb down into the "STREAM" subfolder each and every time) feels like a hassle.
I wonder if I should just go back, bust open those old disk images, use something like ClipWrap or Media Converter to repackage all those .MTS clips in something more portable (like Quicktime or MP4 containers) and just keep around the ones I actually want? There's no quality loss in doing so, and the video/audio content would continue to be usable in both FCPX and pretty much any modern multimedia software, right?
My question is what, if any, good argument is there in 2012 for keeping complete disk images of AVCHD?

Hi Neil,
Sorry about all the frustration.
Why does GB output an iMovie generated video podcast as .mov and Final Cut export to iPod as .m4v?
I don't have the newest GarageBand, so can't really say. But I do know that Final Cut will export a movie in different formats. If you choose the default setting for the iPod, you will get a high quality file, but it will be HUGE! Takes a long time to download, and takes a lot of server space.
This isn't too much of a concern if you have just a few movies and they are short, but if you make many long movies, it's a big problem. We produce a movie every week that's about 40-45 minutes long, so we use the QuickTime .mov as well as the MP4 export from Final Cut Express and encode them as H.264 using settings we've refined to make the file size small. Last week's 38:33 minute talk was 61.1 MB for our large 480x360 .mov video, and 35.5 MB for our 320x240 .mp4 videocast.
The extension on a H.264 file could be .mov (our large video) or .mp4 (our videocast). .m4v can also be H.264 (the default iPod QT setting).
The encoding (like H.264) is the most important part - you want to make something that looks good, sounds good, and streams well.
Hope this is helpful.

Why can't I make a disk Image??

getting Leopard tomorrow. system working great. plan to do an "upgrade installation". backed up all my files (106GB) to an external HDD. so I think I'm ready....
question is - why can't I make a disk image of my "Macintish HD"?
it starts to create the image but Disk Utility comes back and says "Unable to create disk0s2.dmg. Resource busy."
I thought it might be a good idea to do a "complete system backup" just incase something goes wrong with the "upgrade installation".
Since it didn't let me, I just dragged-n-dropped the Users folder to the external HDD, so I got my files backed up.
curious why I can't make a disk image of my WHOLE HDD. can someone enlighten me....
thanks, chris

made changes in the iDVD, don't know what I did but it worked

IDVD not saving disk image...........why?

Hi there,
I'm using iDVD on a G4 733 / 896 Ram / OS 10.3.9.
I'm using an external Pioneer DVR-109 that is not recognized by iDVD. So i thought i'd save it as disk image and burn that with Toast.
Now i can't save as disk image from iDVD. Why?
Does it has to do with the external Bytecc firewire casing.
Thanks for your help my friends........
Martin

Matrin,
What error are you getting when you try to "save as disk image"? Tell us more about what happens....
Does it has to do with the external Bytecc firewire casing
I doubt it...
John B.

Why do I have to make disk image of AVCHD to import into iMovie?

iMovie imports AVCHD format file structure from the camera quite easily. (or so I hear, I have not done so myself yet). I have footage from the camera saved to an external hard disk which I want to import into iMovie08. I am a newbie to Apple/Mac things. From these fora I learned that I need to make a disk image of the AVCHD directory and mount it. I did that and it seems to work.
But this process is painful. For the 12Gig save I made on 27Jan08, the disk utility took forever to make a disk image. It failed once complaining lack of disk space. I thought the firewire external disk was overwhelmed by IO and copied the directory to the internal disk, and made a disk image. I thought it was hung after about 15 minutes killed the diskutility. I had a corrupted image file. Then left diskutility running overnight and seems to have finished the job. This morning iMovie looked at the disk image and is estimating it is going to take 3 hours to bring it in. May be it is transcoding to a more editable format like mpeg-4 or something.
Why do I have to jump through so many hoops to make iMovie recognize the AVCHD structure? Why can't I just drag a AVCHD directory into iMovie and make it read it? If I can reclaim the 24 gigs in the internal disk at the end of the process, I guess I can live with it. But, come on, copying 12 gigs over Firewire, another hour to make a disk image... I was expecting better user experience than this. (Did I mention I am newbie for Apple? Recent refugee from the vistaland)

AppleMan1958 wrote:
I would not recommend waiting until you have 12GB of AVCHD (which might import as 120GB of AIC). You could lose it all if your camera is dropped. I suggest you get in the habit of importing from your camera on a regular basis.
I agree, it is not a good idea to accumulate so much footage in the camera. But these were downloaded from the camera way back before I even bought the iMac. At that time, the only device that can deliver 1920x1080 video to my shiny 50inch TV in the living room was the camcorder! (and the OTA antenna). So I kept the clips in the camcorder, even after taking regular backups to the hard disk. That way I can show the clips to friends and family in full HD glory!
BTW 12 Gig is just 2 hours in HD. It is not much. I dread bringing my second backup 4 hours of our trip to Anguilla, St Marten etc. We all know HD requires ooodles and oodles of data and storage. I am not really complaining about the disk usage. My most important beef was: iMovie imports AVCHD from the camera easily. But it is unable to start from a AVCHD folder in the internal hard disk and start reading it. I can burn a DVD-ROM with AVCHD directory in the root and it reads it. I can copy AVCHD folder to the root of a thumbdrive and it reads it.
But put the very same AVCHD deeply nested in the external drive it barfs.
I am going to experiment after going home. I will create a symbolic link to the AVCHD folder from the root of the external disk. Heck, I am root here, I can even do an ln -s /nested/directory/deep/in/the/external/drive/AVCHD /AVCHD
and see if I can fool iMovie to import the files without creating a diskimage. If someone who has immediate access to iMac would do the experiment it would be very helpful

Why suddenly unable to create a disk image from a CD?

I successfully created a disk image from a CD only 5 days ago. Now when I try to create a disk image from a CD (with Disk Utility) the Superdrive rumbles along for sveral minutes, while the progress bar indicates that it has reached the end of its progress.
Only after all that does a dialog box indicate:
"Unable to create "___.dmg"-Invalid Argument. "
I haven't added software but did upgrade to iTunes 6. Doubtful that could affect my abilty to create a disk image.
Would someone kindly shed some light on why this may be happening?
Steve

Is it strange that this problem seems CD-specific?
Some CDs are copy-protected and some CDs are not copy-protected; so, no, it's not strange at all that you should be able to copy some CDs and not be able to copy others.
Tuttle
1682/8380

USB Flash Drive (with password protected Disk Image) copies files very slowly. Why?

I'm backing up some data onto a 32GB flash drive that I've put a password-protected Disk Image onto, and am copying this data into, but it is achingly slow. It's taking hours to copy just 500MB!
I have another 64MB flash drive that I have set up the same way, but this one copies files very quickly. I can't spot any difference between them in Disk Utility/System profiler.
For the record, the process I've used for bothe drives is reformatted to Mac OS Extended (Journaled), then created a new Disk Image onto each drive (just a bitsmaller than the maximum size of the drive to enable it to fit) with 128--bit encryption.
Does anyone have any idea why the 32GB drive would perform any differently? I am using the same USB port on my iMac for each drive, but am getting very different copying speeds. It's driving me nuts! Many thanks.

The drive seems to be working fine if I copy files onto it outside of the Disk Image file (there's about 200MB of free space left over after I added the DMG). So I can only deduce from that that it is something specifically to do with the DMG itself. Though, as mentioned, I compared the DMG on my (fast) 64GB stick and the DMG on this problematic (slow) 32GB stick in Disk Utility/System Profiler (and I originally set them up in an identical way, as far as I am aware), and they seem to be the same. But one is performing achingly slow. Even dropping a file into the mounted DMG takes a few minutes to even think about it. It's very odd.

HT1578 Why is my encrypted disk image now only read only in Mountain Lion? It was fine read/write in Lion.

Why is my encrypted disk image now only read only in Mountain Lion? It was fine read/write in Lion.
Sorry post did not give me a choice for the mountain lion community. Buggy support interface.
Thanks

Thanks! I haven't posted many questions (i guess that's a good thing).
I did however find an answer to my issue. It was caused by a third party utility called Totalfinder. Once uninstalled and my iMac rebooted, the disk image is behaving to its stated permissions.

IDVD will not burn a DVD - just disk image - why not?

I did a short iMovie project (just about 6 or 7 minutes of video); used a theme, added background music from my iTunes collection-- OK all fine; exported via "Share" to iDVD (all this is iLife'09 and Leopard 10.5.6 on a MacBook May 2006).
I did a DISK IMAGE but then also wanted to test to burn a real DVD. That got to to final step then hung- said one minute to go, then ejected the DVD - but nothing was on the DVD.
Later I used DISK UTILITY to burn the disk image to a DVD- and that DVD played fine on my Mac and even on my 7 year old DVD player.
OK so my MB DVD burner is working; the iDVD makes a valid Disk Image-- but why can't I go directly from iDVD to a DVD?
Thanks for any comments here -- I believe there has been a bit of discussion on this, but not sure if others are able to make a DISK IMAGE and then (if then) burn a DVD as I have. But I'm still not able to do this directly from iDVD.
Regards,
Steve Schulte
Monday 9 March 2009 at 10:50

Hi Beverly, I am using the imovie 09 version with iDVD 09. I didn't do any more editing after sharing the project to iDVD from within imovie. I get no error messages at all, that's the strange thing. It acts like it is encoding fine. But, when you watch the finished product, either a disc image or a burned dvd, it is garbled up from about halfway thru to the end. I even tried to have idvd save the project as a disc image and then used Toast 9 to burn it, and it is the same way, messed up. Just to be sure it wasn't the imovie 09 doing it, I took the same imovie 09 project, put it in Toast 9, and let Toast save it as a disc image, and it was fine. And I burned it with toast and the dvd played fine. I then tried to share the same project again, from imovie 09, to idvd 09, and save to disc image, and or burn it to dvd and again, it messes it up badly. This is a brand new imac bought from the apple store locally. I really can't understand why idvd 09 is this bad? It doesn't make any sense. I've eliminated imovie 09 as the problem. Like I said before, I have a lot of experience using the previous versions of imovie 6, and idvd 6 on a powerbook G4, without any problems? Oh, and I did get the menu sound to work, but not the method listed here. I tried all of those listed, without success. I found that if you keep dragging out the menu sound, and replace it with a new mp3, and drag it out, it finally works. I did this about 6 times. Then, all of a sudden it worked. Makes no sense at all. I never did see the little wave sound thing he talked about. It works now, but the wave isn't there? If there is a way to just remove idvd 09, and replace it with idvd 6.04, I'll do that. Is this possible?

Why is the itunes 11.1 disk image not recognized after download?

I downloaded the new iTunes and am getting an error message that the disk image is not recognized and cannot be opened. Any others having this issue?

go to:http://www.apple.com/itunes/ and download directly from the web 225.6 mb file. Then just install normally.

Why does time machine backup disk images?

I have Time Machine backing up my folders on my Time Capsule but when I look at the Time Capsule drive in the Finder it shows one Sparse Disk Image Bundle. If I lose a folder on my iMac, how can I easily get the folder off of the Time Capsule? Is there a reason Time Machine and Time Capsule is making this Disk Image and not simply dumping folders on there?

Welcome to Apple Support Communities
If you lose a folder, you just have to open Finder, go to the folder where that folder was and open the Time Machine application, so you will be able to navigate through your backups and restore the folder > http://support.apple.com/kb/HT1427
Time Machine always create sparsebundle disk images when you are backing up to a network drive

Why do disk image?

Similar Messages

Maybe you are looking for