Error burning disk
 

I just got a very strange error while trying to burn a data DVD. I'm on 10.4.2 on a PB 15 ich. I put the dvd in, pops up on the desktop normally. I set the name for the cd then drag over the folders I want to burn. Click on burn, verifies data and all. Then it starts to burn and at one point ejects the cd and gives me the following error:

Burning Disk Failed because communication to the disc drive failed. (Error code 0x80020022)
Its the first time I've seem this one. I've had no problems burning in the past (has been about amonth since last time)

Here is the DiskRecording log of this:


I tried to create an image of the folders, so went to disk utility, create image from disk, choose to have it as a CD/DVD master chosoe the folder, gave a name for the image, then clicked to create it. It starts and goes almost until the end and suddenly stops stating "Error 49168" with not much explanation.
I've ssearched the forums here and even google but haven't come up with anything conclusive.
Here is the Disk Utility log for it:

Neither error logs give much explanation on what happened.
I've already repaired permissions just to make sure that that wasn't the issue: same problem in both cases.

Any one have an idea on this ?

This message suggests that this is a job for DVD Drive Repair Man!

But it might also be very bad media. Try another DVD from another box.

...and another brand.

Trevor

The DVDs I tried in there are Memorex DVD-R and Apple branded DVD-R, so I don't think its the media (scrapped 2 of each kind).
However, even if there is an issue with the DVD burner, it still doesn't explain the create image error, which realy is more of an issue to me.

Raven

Was late for me when I last posted, and for some reason thought you were testing the DVD you had tried to burn with Disc Utility.

Don't understand error code either. There's a thread here reporting the same error code.

The poster doesn't seem to get to the bottom of the problem - he observes that the problem appears to be random. I haven't had any problems here - but I only tried to create a 400MB disc image.

Perhaps the problem cuts in on disc images above a certain size? Similar to the problem reported previously here with 10.3.9. Maybe it is the same problem, although I seem to remember that problem gave a more informative error message and affected images above 8GB.

You could try creating a sparse image for your folders and then see if DU will convert to your master. If it fails you will at least know whether the problem lies with creating sparse images (which is what I think 'create image from folder' does first) or with converting them to .cdr.

Agreed. I'll try that to see if I've come up with another annoying disk utility bug.

Hi all...
i discovered the same error message, on a powerbook, 15", 1.67MHz.
I tried to back up data on a DVD, got the same message with toast 7 and the disk utility.
never had that before the upgrade to Mac OS 10.4.2 .

Hi

I am having the same problem on 10.4.2 but am only trying to do a disk image of a 400Mb folder containing digital photos.

(I am trying to back them up to CD so that I can update the same disc over again when taken more photos.)

Does anybody know why it won't work?

Jon

The error message clearly states that it is a hardware error. You've got several possible hardware failure items:
1. the media
2. the cable
3. the drive itself
4. USB or FireWire port (for external drives) or the USB or FireWire subsystem on the motherboard
5. the drive firmware, or bridge hardware (for external drives)

It is wise to start with the least expensive items first, and then graduate to the more expensive items. So, first try different media. I don't care what brand of media is failing, try different media. Different brands of media just sometimes don't work well with different brands of optical drive. This is just as true of Apple discs as it is of Fuji, Memorex, TDK, Taiyo Yuden, Mitsui, or whatever. WHATEVER brand of media is being used, if you get a message like this, try a different brand. It's a cheap troubleshooting step.

If that doesn't help, then go to the cable. Swap it out with another one known good.

If that doesn't help, it's probably your optical drive. For externals you can keep your existing case and swap in a new optical drive (usually this is quite inexpensive, depending on what options you get, between $30 and $60). If you have an internal drive, tray load costs are the same as above, slot load cases, and portable drive cases tend to cost a bit more, but it's still not THAT bad, usually.

Finally, if that doesn't help try different known-working FireWire or USB device (for external drives only) to see if the port has failed.

Trevor

Trevor

It's not a media, port, cable or external drive issue. I am merely trying to create an image of a folder from my internal hard drive onto my internal hard drive so that I can then burn it to disc using the process below:

1:In Disk Utility, create a disk image that contains the files you want to burn to the disc.
The files must be from a volume with a Mac OS Extended disk format. To check a volume's disk format, select the disk in Disk Utility and look at the information at the bottom of the Disk Utility window.

2: Select the disk image in the Disk Utility list and choose Images > Burn.
3: Select the "Leave disc appendable" checkbox. If you don't see this option, click the triangle in the top-right corner.
4: Insert a blank recordable disc in the optical drive, and click Burn.

I'm not anywhere near the burning to disc stage yet as I'm still on stage 1.

I can create an image of a 4Mb file but when it comes to 20Mb + it is giving the above mentioned error.

Jon

Ah. It was not at all clear what error you were referring to when you said you had the same problem, and Raven saw two different issues, the first which occurred during burn.

Trevor

Hi everyone,

Sounds like I'm in good company. I see this same error message from a command-line (hdiutil) and from the Disk Utility GUI when trying to create a disk image from a folder (NOT burning to CD/DVD, just creating the image locally).

G5 iMac 10.4.1
~720 MB disk image

Here's the funny bit ...
Different user ... same equipment, same OS version
~ 820 MB disk image --> this works!

I'm currently looking to the references elsewhere ...
Apple Lists ... http://lists.apple.com/archives/syst.../msg00039.html
Mike Bombich's site ... http://forums.bombich.com/viewtopic....96176067da2286

Google's not giving me much else. So, what gives? Any ideas?

BTW, the hdiutil error:
hdiutil create failed error 49168

U made me realise I had shelved this problem... I'll try it now that I'm running 10.4.4 and see if it still happens.

More information, including a log file, is available at:
http://www.nd.edu/~srussel2/macintosh/hdiutil/

SOLVED: hdiutil create failed error 49168
 

I never thought I'd be writing this, but, yes, I did find a solution to this problem. At the urging of Mike Bombich, I created a verbose log of the hdiutil output and scanned it for irregularities. What I found was that shortly before the error which generated the "49168" message was another error: "diskimages-helper[387] detachTempImageFile: synchronous unmount /dev/disk2 [temp] returned 0x0000C001 (49153)"

A Google search on that returned a good hit at:
http://www.shirt-pocket.com/forums/a...php/t-689.html

... which led me to wonder, "Why is the resource busy?" --> Norton AV is scanning the disk image!! (*sigh*)

So I added this code to my shell script and voila! The problem has apparently vanished. (*knock on wood*)

Thanks to Mike Bombich, Richard Wolf, and Matt Rosenberg who all chimed in with suggestions.

In my opinion, you really ought to change that 'killall' to an appropriate 'rm' command to solve the problem more permanently.
I.e. don't have AV programs scanning your disk. (see other threads with discussion about the uselessness of AV software on OS X)

I knew that NAV was bad, but this is pretty much insane ! Seriously... don't they realise that their software is causing so many issues with every thing ? Don't they get the message that maybe they should make their software less agressive or at least popup a little window telling you "Would you like to scan this ?" before screwing up what your doing...
I don't have time to chedck this right now...But can some one test the following: Go to System Prefs in the Norton Auto-Protect pref pane. Make sure to authenticate to be able to make changes. Got ot he Mount Scan tab. At the bottom where it says Scan: change it to "These kinds of Disks" and uncheck "All other disks" to see if this will skip all disk images since the first three sections apply to CDs, DVDs and iPods only. Then try again diskutil to see if the problem is gone away.

Virus scanning
 

In some environments, whether we like it or not, virus scanning software for all platforms is mandatory and cannot be easily avoided. There are policies to adhere to in many organizations, whether they are commercial or educational or whatnot.

In general, I think it's unwise to think that Mac OS X will be free from viruses and other malware forever. I don't necessarily subscribe to the meme that "it's just a matter of time," because it's been over five years since the Public Betas and almost five since 10.0. As we have seen, it has apparently been far more resistant that other OSes in that timeframe, yet that's no reason for complacency. It's just good practice to be prepared ... that's why we make backups, right? ;)

One of the advantages of having AV software, if there is one on a platform with no viruses, is that you're more likely to be able to get a quick update from a vendor to recognize any virus that does appear. Without AV software, you're more of a sitting duck.

Ok I'll raise my hand for for "Have to in education settings" ... However, still Symantec should make their product either less agressive, more easily configurable, have popup warnings before scanning (not give you an option to pause or cancel the scan once it has started)... For now, its realy the Have to thats keeping it on my machine... But I'm thinking of tryying to prove to them that clamxav is a sufficiently protective product and its free contrary to expensive Symantec licences that have to be renewed each year...

hdiutil 49168 ... one further note
 

One more note: I had a user for whom my backup application continued to fail during the hdiutil process. Even with Symantec turned off, it was still returning the 49168 error. Looking through the volume on which it was failing, I discovered that several documents had really strange permissions (Excel spreadsheets with -rwx------, for example).

find /Volumes/Data -type f -exec chmod 644 {} \;

This changed the permissions on all files (not directories) to 644. After that, hdiutil worked like a champ and the backup worked.

Hope this helps someone else!

I didn't think of updating this thread, but for some reason since 10.4.5 (and I had also disabled Norton AV) I can burn dvd's normally at fulll speed.
Still can't figure out what the issue was but guessing something got changed with 10.4.5 that fixed the issue. Maybe it replaced a file that had previously been modified by NAV and it replaced it with a fresh new non.modded file... But that's just speculation.

error 49168
 

I've localized the problem down to Symantec's SafeZones feature in SAV.
This feature can be disabled in my case using the Syamntec Auto Protect preference pane. Click on the SafeZones tab and choose Nowhere.

I was getting that error when trying to create large (>10GB) image files using Disk Utility and hdiutil from the command line.

This feature has been causing other problems in our Enterprise environment for quite a few years...

Mac OS X 10.4.10
G5 Dual 2.3Ghz
1.5GB RAM

Error 49168
 

Raven,
I just received exactly the same error when trying to create a disk image of folder using disk utility.
I can create this error with regularity by trying to create a Disk Image of my iPhoto Library in order to create a b/u from a external hard disk to my boot drive.
I am trying to do a Disk Utility FILE/NEW/DISK IMAGE FROM FOLDER.
The error I receive back is "Unable to create iPhoto Library - error 49168"
The log shows the following:
Creating Image “Image iPhoto Library.dmg”
Initializing...
Creating...
Copying...
Finishing...
Unable to create “iPhoto Library” - error 49168.

In your case it has nothing to do with the CD, drive etc that I can tell.

Puzzled

:confused: