Disk Utility burn error with dmg file

I'm using a Pioneer DVR 106D to burn a dmg file on to a blank DVD. I've done it many times before with the disk utility.
But now I'm getting this message when I try to burn the dmg or make a new image off the old DVD master:
"Device drained its buffer without burn underrun protection"
Can anyone please tell me how I can fix this problem?
Thanks
OS 10.3.9

I have encountered the same problem. I have a Mac Book Pro from 2007, and it has gone through 3 DVD writers so far, all of which have ruined DVD+R DL disks. I have occasionally been able to burn one, but usually during verify, I get this error message:
Communication to the disk drive failed: 0x8002022
And disk utility fails with a "Invalid B-tree node size" error
Oddly, when I try to burn a disk near capacity (6.5Gb or more) it is more likely to fail than if I burn a smaller disk.
I've been using Memorex DVD+R DL disks, but I have used other brands in the past but they have failed, too. Out of about 50 disks so far, I have had success with about 5.

Similar Messages

Disk Utility: Burn error: 0x80020022 The device failed to respond...

I've been working on archiving a ton of video to DVD. I'm using Dual-Layer discs to minimize the amount of physical storage space needed for the finished project. I burned several discs in iDVD in July and regularly received errors. Then the drive suddenly stopped loading any type of media. Anything I inserted would spin briefly and then eject. Repaired permissions and followed steps outlined here and here. Took the Mac back to the store where I bought it (sadly, not an Apple Store - nearest one is 12 hrs away) where naturally it performed flawlessly for the store rep.
So I took it home and resumed burning, now saving as a disc image (ignoring iDVD's warning about the performance of DVDs burned this way) and using Disk Utility, since iDVD didn't seem to be reliable. Burned about 25 discs, error-free, in this fashion, then three days ago, got the error: "Unable to burn “Disc 19.img”. (The device failed to respond properly, unable to recover or retry.)"
Retried the same image, and it worked. Then burned two more in the same fashion with no errors. Today I got the same error again. Logs are identical for each failed burn, except for the time span between certain lines.
Price of DL media being what it is, I'd hate to keep ruining discs if there's something I can do to avoid it. I suppose it could be bad media, but it seems odd that I'd get two bum discs that close together after burning so many without issue. Checked the site and the forums, and there doesn't seem to be any answers. Does anyone have any ideas? (Other than "try a different brand of media." I've got a buttload of these discs and it's too late to return them now.) Even if it just helps determine where the issue lies. Warranty will be up soon, so if it's hardware related, I need to get it taken care of quick.
Media: Philips DVD+R DL 8x
*Drive info:*
HL-DT-ST DVDRW GS21N:
Firmware Revision: SA15
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: Insert media and refresh to show available burn speeds
DiscUtility.log:
2009-10-03 08:54:01 -0600: Burning Image “Disc 22.img”
2009-10-03 08:55:15 -0600: Image name: “Disc 22.img”
2009-10-03 08:55:15 -0600: Burn disc in: “HL-DT-ST DVDRW GS21N”
2009-10-03 08:55:15 -0600: Erase disc before burning: No
2009-10-03 08:55:15 -0600: Leave disc appendable: No
2009-10-03 08:55:15 -0600: Verify burned data after burning: Yes
2009-10-03 08:55:15 -0600: Eject disc after burning
2009-10-03 08:55:15 -0600:
2009-10-03 08:55:15 -0600: Preparing data for burn
2009-10-03 08:56:30 -0600: Opening session
2009-10-03 08:56:35 -0600: Opening track
2009-10-03 08:56:35 -0600: Writing track
2009-10-03 09:01:37 -0600: Finishing burn
2009-10-03 09:02:37 -0600: Closing session
2009-10-03 09:02:38 -0600: Finishing burn
2009-10-03 09:38:37 -0600: Burn failed
2009-10-03 09:38:37 -0600: The device failed to respond properly, unable to recover or retry.
2009-10-03 09:38:37 -0600: Additional information can be found in the ~/Library/Logs/DiscRecording.log log file.
2009-10-03 09:38:37 -0600: Unable to burn “Disc 22.img”. (The device failed to respond properly, unable to recover or retry.)
DiscRecording.log:
Disk Utility: Burn started, Sat Oct 3 08:55:15 2009
Disk Utility: Burning to DVD+R DL (CMC MAG D03) media with DAO strategy in HL-DT-ST DVDRW GS21N SA15 via ATAPI.
Disk Utility: Requested burn speed was 47x, actual burn speed is 4x.
Disk Utility: Burn failed, Sat Oct 3 09:37:15 2009
Disk Utility: Burn sense: 4/44/90 Hardware Error,
Disk Utility: Burn error: 0x80020022 The device failed to respond properly, unable to recover or retry.
Message was edited by: Weasel42

I have encountered the same problem. I have a Mac Book Pro from 2007, and it has gone through 3 DVD writers so far, all of which have ruined DVD+R DL disks. I have occasionally been able to burn one, but usually during verify, I get this error message:
Communication to the disk drive failed: 0x8002022
And disk utility fails with a "Invalid B-tree node size" error
Oddly, when I try to burn a disk near capacity (6.5Gb or more) it is more likely to fail than if I burn a smaller disk.
I've been using Memorex DVD+R DL disks, but I have used other brands in the past but they have failed, too. Out of about 50 disks so far, I have had success with about 5.

Disk Utility - Burning DVD from desktop file created from camcorder

I am unable to burn a DVD from a file on my desktop. When trying to use the upper tray, the disk drive won't remain closed and I am unable to proceed.
When using the lower tray, it begins the burn process, then returns this message:
Unable to burn file. The device failed to respond properly, unable to recover or retry.
The upper tray is a HL-DT-ST RW/DVD GCC-4480B
The lower tray is a Sony DVD RW DRU-530A.

Thanks for answering ALL the questions, too many times I ask as many questions as possible to get as much info as possible and I get a one line response.
4GB file with Disk Utility should be fine.
4x speed should be fine too, but you may want to try 2x, just in case the ATA-33 bus is struggling. The ATA-33 bus is the original bus in the MDD for the optical drives, the hard disks were on an ATA-66 and ATA-100 bus. Unfortunately ATA-33 is very limited in the amount of data it can reliably send in a given time, and 4x DVD burning is the absolute limit.
Sony DVD-R should be fine, many here are wary of Memorex media, I use it for temporary copies of product / games discs, but never for backups.
How is the external DVD burner attached ? FireWire ?
It really should be working, you've already confirmed that both the drives successfully burn CDs, so we know they're recognised and operating. And you've said the 4GB camcorder file is on your desktop, ie. on the internal hard disk, so we know it's not a speed issue with the source file, like if it was on a flash drive - or is it ? Or is it still on the camcorder ? If so get it copied to the internal hard disk.
Can you confirm the ATA-33 bus and Disc Utility support for the drive by using Apple System Profiler, if you select ATA, it should appear on the ATA-3 bus. You'll also have an ATA-4 and ATA-6 bus.
If you click on "ATA-3 bus" you should find an entry "Disc Burning" and it should say "Apple Supported" or similar. If it doesn't then I don't think you can burn with Disk Utility. Generally, above OSX 10.4.6 (or 10.4.5, can't remember exact) all these drives are supported, for burning and booting from. I suspect you're fine as you've said you burn CDs with it fine.
One thing some people do is to buy an ATA-133 PCI card, and run the internal hard disks off that and the ATA-100 on the motherboard. Then use the motherboard ATA-66 slot to drive the optical drives. Don't spend any money yet, we'd have to confirm that the burn speed is the issue. Like said, try burning at 2x or 1x.
Apologies now if my Apple System Profiler instructions are not 100% accurate, my OSX 10.5.5 Mac is unavailable just now so I've based my instructions on OSX 10.3.9 ASP.

Cross Post:: Disk Utility Application - Errors with USB Drive

I have a 4200 2.5" 100GB Hard Drive in a "portable" configuration that I've used for some time. I had not plugged it into my MBP until today and it seemed to read the drive, but that's about it. I went to Disk Utility to do what I used to call in the PC world a "format" or "fdisk" to get all the stuff off of it and get it setup as a Backup drive for my MBP. Essentially, the drive is now kaput! Actually, what happens is, when I attempt any task in the Disk Utility app, it simply freezes up and no matter how long I wait (I've waited thirty minutes) nothing happens and I'm forced to "force end" to the app. Any ideas on this?
I am able to take the drive to my XP machine and reformat / repartion the drive, but it will not allow files to be copied over to it in the mac using the NTFS. This also seems odd to me. Any ideas on this one?
Thanks,
Bob

I posted a reply to that.
Explanation:
I posted originally in the other forum because it is a USB drive issue. I cross posted because it is an Application issue. I probably should have just posted in one or the other!
Thanks Jim,
Bob

Disk Util wont read my .dmg backup

Hello,
Because I changed my hard drive, I thought it was wise to partition the new one with Disk Utility so it would have two partitions so I could just make a .dmg from the Mac OS parition and the Bootcamp partition over to the new ones.
While it worked for the Mac OS one, it didnt for the Bootcamp one and I couldnt boot Windows XP anymore.
When I asked the Bootcamp Assistant to setup my system it said it wasn't happy with my partitions and need a GUID disk.
Since mine was in AFM, I had to erase everything on it and put it in GUID with a single partition.
Now, before doing this I had Disk Utility erase the second partition I did on the new drive, make the Mac OS partition the whole disk and used Disk Utility to make a .dmg backup of the drive.
Since I formatted in GUID with a single partition, Disk Utility decided it doesn't like my .dmg backup anymore.
I reinstalled OS X Leopard from scratch and tried to mount it but it says no valid filesystem inside.
I tried to raw copy it with dd in terminal on a USB disk but same thing, it won't mount the drive.
When I use the restore function in Disk Utility, it says error 254 cannot validate filesystem.
I used it once successfully to check it before erasing the master drive and now the backup won't work anymore.
I am very upset, this 90 gigs backup contains all my photos, music and files.
Thanks for your help!
Pierre

I had a 320Gb drive with OS X on one partition and XP on another.
I bought a 500Gb drive, I thought I could do the same 2 partitions and just copy over the OS X and XP partitions to have everything work like before.
But it didnt work so now I have a .dmg containing my original OS X partition that I would like to copy over to the new HDD but it wont work as the dmg has not filesystem in it according to Disk Utility and gives an error 254 when I try to use it with the restore function.
However, I used this very same dmg file once yesterday to restore the drive. It was fine except that the new drive wasnt set to be a GUID drive so it would only boot so far but won't get into Leopard, hanging one line before launching the login app (I have the boot sequence set as verbose so I could see where it hung).
And now the same dmg file isn't working anymore on the GUID formatted 500Gb drive.

Disk Utility internal error message

I am receiving an error message every time I try to repair permissions on my MB running OS X 10.4:
error:
Disk Utility Internal Error
Disk Utility has lost its connection with the Disk Management Tool and cannot continue. Please quit and re launch Disk Utility.
Tried that several times to no avail. After quittting Disk Utility, system becomes very sluggish and Finder stops responding.
I then booted from the installation CD and ran a Hard Disk integrity check. It checked Ok. Then I tried a permission repair and got the exact same error message quoted above.
Any help?

There was a problem with this a couple of years ago involving iTunes Library Receipt files. See [Mac OS X 10.3: Repair Disk Permissions 'Disk Utility has lost its connection with the Disk Management Tool.|http://docs.info.apple.com/article.html?artnum=303132].
It seems unlikely that would surface now, but the suggested fix is worth trying. The article also mentions looking at Console log. Console is in Applications/Utilities.
Also, see this recent thread in the Panther forum:
http://discussions.apple.com/thread.jspa?threadID=1585878

Disk utility burning issue

I'm trying to burn some DVD/DVD DL from disk images.....
I never got a success with *disk utility*..
after burning one with *disk utility*, checking disk always fails: an error on a sector (never the same)
in the other side, burning same image with toast works fine....
this doesn't come from the disk because first I burned with disk utility and then with toast (disks come from same cake)

Malcolm Rayfield wrote:
Are you running 10.6.3? That update made disk burning more reliable on my Mac Pro.
yes, installed *Mac OS X v10.6.3 v1.1* and *Security Update 2009-001*...
one thing has been improved: restoring an image to a pen drive or HD, now it works at first time.. ( with increased speed).
no matter the burning speed I select, ever with lowliest selected, burning always fails...
but only with disk utility !

Disk Utility Burning CDs and DVDs Windows Compatibility

I don't burn many CDs or DVDs. However, a friend of mine recently switched to Apple, and he burns quite a few movies and CDs. He asked me how to copy DVDs, burn Audio CDs, and save files to CDs and DVDs. The only thing I knew how to do was to burn files to CDs. I know that CDs that are burned in the Finder will work on Mac OS and Windows. My question is about Disk Utility. I've read that Disk Utility does not create Windows compatible disks, however Apple's instructions for making a copy of a movie DVD are to use Disk Utility and create a CD/DVD master image to burn to a DVD. Disk Utility uses the .cdr format, which supposedly does not work with Windows. So, if I wanted to copy a Windows application CD, could disk utility make an exact copy of it or not? It seems to me that it should since I am making an exact copy using CD/DVD master, but will it do it or not? Also, if I made a copy of a Movie DVD using CD/DVD master (.cdr) will it only play on Macs or will it play on Windows also? When it comes to Audio CDs, I realize one must use iTunes to make Audio CDs. I have searched all over the internet for answers to these questions and most people say use Roxio Toast or they just don't answer these questions very clearly.

If you have two optical drives connected to your computer, you can just clone the disc. However, I'd recommend Roxio Toast, as others have, because it'll handle all the compatibility issues for you. Dealing with Finder and Disk Utility guarantees compatibility with macs, but not necessarily Windows, or even standard DVD/CD players depending on how you burn it.
If you have audio files, use iTunes to burn an audio CD. If you have movie files, use iDVD or Toast to burn a standard DVD (not a data disc).

Internal Hard Drive Died - Now replaced - Disk Utility Internal Error

When using the original system disk to install OSX the new hard drive isn't recognised even though I have formatted it for an intel based mac (GUID Partition, Extended Journaled etc) using my imac . When launching Disk Utility from the system disk and trying to erase/partion the drive, I get the following error message "Disk Utility Internal Error - Disk Utility has lost its connection with the Disk Management Tool...". When connected to my imac using a converter it appears on my desktop. Any help would be greatly appreciated. The macbook in question is a 2006 (white). PLEASE HELP.....

Hi - Thanks for your reply. I have tried that but it still doesn't work. I have had a look around online for the past couple of hours and I found a post that said that newer hard drives can't be recognised by an original 10.4 osx system disk. I would need to find a copy of 10.5 to install OSX on a new hard drive. I dont know if that's true because I dont have a copy of 10.5. Any thoughts would be appreciated!

Will Disk Utility Burn a DL Disk Image to DVD?

Will Disk Utility burn a DL Disk Image created by iDVD to a DL DVD? I'd like to save myself the rendering time to find out that it won't, if that is the case.

JCC,
The last I knew there could be a problem with setting the proper break point when creating/working from the disk image of a double layer disc, but I may have missed something recent.

Upgrade Macbook from 10.4 to Lion with .dmg files

I have an old Macbook running OSX 10.4.11 that I would like to upgrade to OSX 10.7 (Lion).
Can I do this whole process (upgrade to 10.5, then 10.6, then 10.7) using .dmg files created from install CDs? I don't have a working CD drive, but I have a friend with .dmg files of all the retail install CDs.
Can I skip 10.5? I know I need 10.6 before I can go to 10.7.

well if your Mac meets the requirements, it's also possible, to install it from a USB stick directly wihtout the previous OS X versions...
I had Snow Leopard on my MBP and I deinstalled it completly and just installed Lion without installing Snow Leopard before and it works...
If you have the Lion installation app, you have to look for the InstallESD.dmg (folder SharedSupport)..
This dmg file you need for the USB stick or for a DVD...
Below is a link, which descirbes the procedure (in German):
http://www.netzwelt.de/news/87602-anleitung-bootfaehige-dvd-mac-os-x-lion-erstel len.html

Problems with Disk Utility backup & restore via DMG disk images

I attempted to backup and restore a 2TB external raid storage device using the recommended Disk Utility procedure for 10.6.6. One of the HDDs in the raid enclosure had started to fail.
First step was to create a new image from the 2TB device. I accepted the defaults of compressed image format and no encryption. The image took about 15 hours to create, and when complete, I was left with 2 files:
OWC2TB.dmg (1.1TB)
OWC2TB.002.dmgpart (486GB).
To check the DMG I ran the Disk Utility "Verify Disk" on the DMG, and got the message "The volume OWC2TB appears to be OK". The DMG is described in DU as:
Description: Apple UDIF read-only compressed (zlib)
Connection Bus: Disk Image
Total Capacity: 2 TB
Disk Write Status: Read Only
Partition Map Scheme: No partition map
I then replaced the failing HDD in the enclosure, recreated a new 2TB filesystem on the device, and attempted to restore from the DMG image.
The first attempt was to use Disk Utility "Restore" function. I specified the DMG as the source and the new device as the destination, and chose "Erase Destination". This failed immediately with the error "Restore failure. Could not find any scan information. The source images needs to be imagescanned before it can be restored".
After researching this error I tried to correct it by selecting the DMG in Disk Utility and running Images => Scan Image for Restore. This failed immediately, complaining there was insufficient disk space. More research revealed it needed the same amount of spare space on the same disk to do an imagescan. So I had to free up an EXTRA 1.5TB of space in addition to the space the DMG consumed. Not very user friendly.
The next attempt to imagescan the DMG got further than the "insufficient space" error. It displayed "Scanning image OWC2TB.dmg, Block Checksum Partition #1". This ran for about 10 hours. At the end, it displayed a new error message "Unable to scan OWC2TB.dmg (internal error)".
Next I tried to mount the DMG and copy the files manually. My first attempt at this resulted in a "Verifying..." phase which looked like it will take about 10 hours, so I clicked "Skip". Soon after I got an error message "Unable to attach OWC2TB.dmg (no mountable file systems).". Now I am trying a mount with the Verify option...
Can anyone suggest what I can try next to restore the DMG?
I think the problem might be the fact the DMG is split in two parts, but the imagescan/restore software does not know how to read the second part? Is there a way to join these into a single DMG?

I attempted to backup and restore a 2TB external raid storage device using the recommended Disk Utility procedure for 10.6.6. One of the HDDs in the raid enclosure had started to fail.
First step was to create a new image from the 2TB device. I accepted the defaults of compressed image format and no encryption. The image took about 15 hours to create, and when complete, I was left with 2 files:
OWC2TB.dmg (1.1TB)
OWC2TB.002.dmgpart (486GB).
To check the DMG I ran the Disk Utility "Verify Disk" on the DMG, and got the message "The volume OWC2TB appears to be OK". The DMG is described in DU as:
Description: Apple UDIF read-only compressed (zlib)
Connection Bus: Disk Image
Total Capacity: 2 TB
Disk Write Status: Read Only
Partition Map Scheme: No partition map
I then replaced the failing HDD in the enclosure, recreated a new 2TB filesystem on the device, and attempted to restore from the DMG image.
The first attempt was to use Disk Utility "Restore" function. I specified the DMG as the source and the new device as the destination, and chose "Erase Destination". This failed immediately with the error "Restore failure. Could not find any scan information. The source images needs to be imagescanned before it can be restored".
After researching this error I tried to correct it by selecting the DMG in Disk Utility and running Images => Scan Image for Restore. This failed immediately, complaining there was insufficient disk space. More research revealed it needed the same amount of spare space on the same disk to do an imagescan. So I had to free up an EXTRA 1.5TB of space in addition to the space the DMG consumed. Not very user friendly.
The next attempt to imagescan the DMG got further than the "insufficient space" error. It displayed "Scanning image OWC2TB.dmg, Block Checksum Partition #1". This ran for about 10 hours. At the end, it displayed a new error message "Unable to scan OWC2TB.dmg (internal error)".
Next I tried to mount the DMG and copy the files manually. My first attempt at this resulted in a "Verifying..." phase which looked like it will take about 10 hours, so I clicked "Skip". Soon after I got an error message "Unable to attach OWC2TB.dmg (no mountable file systems).". Now I am trying a mount with the Verify option...
Can anyone suggest what I can try next to restore the DMG?
I think the problem might be the fact the DMG is split in two parts, but the imagescan/restore software does not know how to read the second part? Is there a way to join these into a single DMG?

Disk Utility "restore" fails with "no such file or directory"

Some time back, perhaps a LONG time ago, I successfully used Disk Utility's "restore" function to "clone" my Mac OS X partition onto an external disk, before I upgraded the OS on my internal drive.
This weekend I tried to do it again, and failed on every attempt.
My first attempt was on my MacBook. At very end (the progress "bar" was all blue) it died saying that there was an error (2), "no such file or directory". I think the external drive probably isn't GUID, which would make it non-bootable, but I'd still think "restore" itself should work.
Okay, let's try my Power Mac G5, which is where it worked several releases ago. Same thing.
Okay, one more try... Booted into safe mode (in case background activity accounts for the missing file/directory), did the restore again, failed again.
I realize that SuperDuper or Carbon Copy Cloner or other tools may be "better", but since this worked once it seems like it still should.
Any ideas?
Doug

Did you:
A. Repair the hard drive and permissions prior to cloning?
B. Erase the destination drive before cloning?
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now shutdown the computer for a couple of minutes and then restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
How to Clone Using Restore Option of Disk Utility
1. Open Disk Utility from the Utilities folder.
2. Select the backup or destination volume from the left side list.
3. Click on the Erase tab in the DU main window. Set the format type to Mac OS Extended (journaled, if available) and click on the Erase button. This step can be skipped if the destination has already been freshly erased.
4. Click on the Restore tab in the DU main window.
5. Select the backup or destination volume from the left side list and drag it to the Destination entry field.
6. Select the startup or source volume from the left side list and drag it to the Source entry field.
7. Double-check you got it right, then click on the Restore button.
8. Select the destination drive on the Desktop and press COMMAND-I to open the Get Info window. At the bottom in the Ownership and Permissions section be sure the box labeled "Ignore Permissions on this Volume" is unchecked. Verify the settings for Ownership and Permissions as follows: Owner=system with read/write; Group=admin with read/write; Other with read-only. If they are not correct then reset them.
For added precaution you can boot into safe mode before doing the clone.

Disk Utility: after creating the .DMG (compressed image) When "scan image for restore" finishes it displays "unable to scan (internal error)". Since the process was scanning for about 1 hr is this a fake warning?

External 500GB drive is partitioned with 400GB for Mac OS extended (journalling) and 2nd partition formatted today as "ExFAT".
Yesterday I tried to create a disk image of my HD to no avail - this was compressed on a FAT partition. I got a warning after running the <scan image for restore> saying "unable to scan (internal error)"
I rang Apple support who suggested formatting a partition as MAC OS extended (journalling) and choose to save the image as "read/write'. The image process stopped writing at about 200GB and then the file size jumped to 499GB (ie the size of the HD). But the process did nothing for about an hour so I foce quit disk utility (as suggested by apple support)
My current attempt was to format the external drive again; this time with a 400GB Mac OS extended (journal) format; plus a 100GB ExFAT format partition. The new image was created after about 2.5hrs with a compressed size of 149GB. However, after running the "scan image for restore" facility I got the warning message "unable to scan filename " (internal error). The process was scanning the image file according to the progress bar - this took about hour - thus the warning is a puzzle.
If anyone can say more about this error I would really appreciate knowing tips for using disk utility. The screen grab is below.
"unable to scan filename " (internal error)
thanks

Thanks for a quick reply <baltwo>. You’ve answered that it is not a fake message!
fyi: I thought that I would use my external Buffalo for two purposes; namely the smaller ExFAT partition for copying stuff to my win7 netbook. The larger partition was to be used as my imac image of SL. So this was my first attempt at using disk utility - the idea being to hold an image backup at another location. Plus I now have the Lion thumbdrive ready to upgrade from SL and so being cautious wanted to have a SL image backup
Anyway I followed the apple instructions using my mac 10.6.3 install DVD but it would appear from other discussions that <unable to scan (internal error)> is not unique to me.
I’ll get back to apple telephone support for further advice.
I would though be grateful for an “idiots’ guide to making an image backup of my internal HD that runs SL 10.6.8
eg should I have just one partition on the external USB drive? format it as Mac OS extended? create the image as compressed or read/write? Basically I’ll do whatever will work!!
thanks again

Can Disk Utility burn a Blu-ray ISO file?

This is a simple question to pose: assuming only the best of media and burner hardware (so that problems with those don't come into play), can Disk Utility reliably burn ISO images that represent a Blu-ray disk, complete with chapters and whatever else is contained on a Blu-ray disk?
Background
I'll be using Adobe Premiere to generate videos for burning to Blu-ray disk. There seems to be several ways for me to do that, and most of them seem to have problems:
1. From the completed Premiere project, I can jump into Adobe Encore and burn from there. But… many comments on the Adobe forum suggest that route may be problematic. No burn-speed control for instance. The Encore forum is full of people who don't use Encore's burning abilities, but instead use Toast or the PC equivalent.
2. Use Toast. I've just received a special offer form Other World Computing to buy Toast 11 Pro for $49. But… I've been put off buying Toast because of many poor reviews on Amazon. A handful of poor reviews I could ignore, but there are dozens.
3. Use Encore to generate an ISO image of my completed Blu-ray, then use Disk Utility to burn that ISO. But… there are websites in the internet jungle telling me I need to download their product to be able to burn Blu-ray ISO images on a Mac. On the other hand, there are reputable websites (here and here) that explain how to use Disk Utility to burn Blu-ray ISOs.
Basically, I'm confused. It seems to me that Encore > ISO > Disk Utility is the way to go, but I would like confirmation from Apple users that this route will work and is reliable. If not, maybe I should be buying Toast before the special runs out on 30 April.

First, I duplicated one of the links in my original post. The correct links are (1) and (2).
Thanks for the replies, but they haven't cleared up my confusion.
On the last page of the first link, lifted from the California Institute of the Arts website, clear instructions are given for using Disk Utility to burn a Blu-ray ISO.
Right at the bottom of the second link, lifted from the Drexel University website, similar instructions are given for using Disk Utility to burn a Blu-ray ISO.
Are both instructions incorrect in their basic assumption? When their students go to video lab to burn a Blu-ray, do the students find it can't be done?
This is really confusing. Toast gets very poor reviews, yet I've never had a problem with Toast 9. Two tertiary education sites tell me how to burn a Blu-ray with Disk Utility, but I've just received two responses which tell me it can't be done. I'm intrigued.

Disk Utility burn error with dmg file

Similar Messages

Maybe you are looking for