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Disk Utility: Unable to create "ImageName.dmg" error -39

Ladies,

Gentlemen,



I used Disk Utility to backup the internal hard drive of my iMac G5 iSight.

The last backup of the hard drive was unsuccessful, ending with next message: Unable to create "ImageName.dmg"; error -39.



The iMac is running OS X 10.4.11.



I proceed as follows:

Boot from the OS X 10.4.2 installation DVD and firing up Disk Utility.

Menu option: File, New, Disk Image from disk0s3 (Mac HD)

The target disk is Porche_LaCie FireWire drive.

After +/- 2 hours I end up with the above message.



The hard drive has following characteristics:

Name : Mac HD

Type : Volume



Disk Identifier : disk0s3

Mount Point : /

File System : Mac OS Extended (Journaled)

Connection Bus : ATA

Partition Type : Apple_HFS

Device Tree : sata/k2-sata@0/@0:3

Writable : Yes

Universal Unique Identifier : 9AFCA71A-DD8B-376E-9776-EE7EDDBB328C

Capacity : 148,9 GB (159.907.627.008 Bytes)

Free Space : 96,9 GB (103.996.362.752 Bytes)

Used : 52,1 GB (55.911.264.256 Bytes)

Number of Files : 419.419

Number of Folders : 104.321

Owners Enabled : Yes

Can Turn Owners Off : Yes

Can Repair Permissions : Yes

Can Be Verified : Yes

Can Be Repaired : Yes

Can Be Formatted : Yes

Bootable : Yes

Supports Journaling : Yes

Journaled : Yes

S.M.A.R.T. Status : Verified

Disk Number : 0

Partition Number : 3



The target drive characteristics:

Name : Porche_LaCie

Type : Volume



Disk Identifier : disk1s1

Mount Point : /Volumes/Porche_LaCie

File System : Mac OS Extended (Case-sensitive, Journaled)

Connection Bus : FireWire

Partition Type : Apple_HFS

Device Tree : fw/node@d04b7417066788/sbp-2@c000/@0:1

Writable : Yes

Universal Unique Identifier : BCCEBED2-08F5-3C21-8750-75716AF060B9

Capacity : 232,9 GB (250.056.705.024 Bytes)

Free Space : 160,8 GB (172.646.076.416 Bytes)

Used : 72,1 GB (77.410.627.584 Bytes)

Number of Files : 15

Number of Folders : 4

Owners Enabled : No

Can Turn Owners Off : Yes

Can Be Formatted : Yes

Bootable : Yes

Supports Journaling : Yes

Journaled : Yes

S.M.A.R.T. Status : Not Supported

Disk Number : 1

Partition Number : 1



The target drive already contains 3 earlier images. The biggest image has a size of 28,14 GB. And as you can see this drive ha enough place for other images.



So what is going wrong?

I Googled for this error -39 without any success and I have not found any thing about this particular error in Apple's discussions or support pages.



I would feel a lot safer with a decent image of my Hard Drive. I already lost one and do not want to repeat this again...



Can any one help?

iMac iSight PowerPC G5, Mac OS X (10.4.11), 1.9 GHz, 1 GB DDR2 SDRAM and a Hard Drive of 160 GB

Posted on Aug 20, 2008 3:25 PM

Reply
Question marked as Best reply

Posted on Aug 20, 2008 3:32 PM

If you want to create a backup of your system volume, then do not use disc images. They are not bootable. Here's a far better solution:

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.

You can also do the same using other backup utilities that can create bootable backups:

Backup Software Recommendations

My personal recommendations are (order is not significant):

1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. Carbon Copy Cloner (Donationware)
6. SuperDuper! (Commercial)
7. Intego Personal Backup (Commercial)
8. Data Backup (Commercial)

Also read How to Back Up and Restore Your Files.
3 replies
Question marked as Best reply

Aug 20, 2008 3:32 PM in response to Pierre Collin

If you want to create a backup of your system volume, then do not use disc images. They are not bootable. Here's a far better solution:

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.

You can also do the same using other backup utilities that can create bootable backups:

Backup Software Recommendations

My personal recommendations are (order is not significant):

1. Retrospect Desktop (Commercial - not yet universal binary)
2. Synchronize! Pro X (Commercial)
3. Synk (Backup, Standard, or Pro)
4. Deja Vu (Shareware)
5. Carbon Copy Cloner (Donationware)
6. SuperDuper! (Commercial)
7. Intego Personal Backup (Commercial)
8. Data Backup (Commercial)

Also read How to Back Up and Restore Your Files.

Disk Utility: Unable to create "ImageName.dmg" error -39

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