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Wow, great hint. This is going to go to good use. Thanks!

Somehow I thought that was what the menu item Images -> Scan Image for Restore always did... but I suppose there has been at least one occasion where this may have actually been what I needed.
g=

Happily, I've never found myself in a position where I needed to restore my backup image files, (made with Carbon Copy Cloner.) But I'd like to know the routine if I ever need to use it.
My question: since I back up separate partitions into separate disk image files, is this hint inapplicable to me? Does this hint only apply to backing up multiple partitions into a single disk image?
(I had no idea it was even possible to backup multiple partitions to a single disk image...)

This is great. I was getting real frustrated with Disk Utility's non-specific error messages. This worked just like you said it would.

Great post. However, when I tried this I got a 'Resource busy' error.
In order to avoid this problem, you have to make sure the mac OS isn't 'using' the device first. To do this just open the DiskUtility.app, and on the target USB hard drive, unmount any of it's partitions. Make sure to not eject the USB hard drive so that the device is still available in DiskUtility and shows up in the result from 'diskutil list'.

Many thanks to you and daveosborne for your hints !
1) I'm currently dumping the content of a .dmg file to an external disk.
2) 'with an appropriate buffer size to copy over the whole block image, including partition table and boot sector'
-> what do you mean by that and how can I determine which buffer size is appropriate ?
-> how did you determine the 131072 size ?
For my use I trusted blindly the example and used the bs=131072 option. Untill now it seems to be working... (it's still copying).
I'm currenlty getting tons of lines on my terminal screen that look like :
...
CZlibDecompressor::decompressData: src 0x02E4AA97 srcLen 116073
CZlibDecompressor::decompressData: dest 0x02E26000 destLen 262144
CZlibDecompressor::decompressData: src 0x02E61F0D srcLen 20723
CZlibDecompressor::decompressData: dest 0x02E26000 destLen 262144
...
with sometimes long series of
...
CZlibDecompressor::decompressData: src 0x02E66B71 srcLen 1167
CZlibDecompressor::decompressData: dest 0x02E26000 destLen 262144
CZlibDecompressor::decompressData: src 0x02E66B71 srcLen 1167
CZlibDecompressor::decompressData: dest 0x02E26000 destLen 262144
...
I notice the destLen (I suppose it means block destination length) 262144 is exactly the double of the bs=131072 that was used before. I'm curious if anyone can help me understand this. Does this mean the source data is sparsed over the destination disk by blocks of 131072 or 262144 bytes, thereby fragmenting the disk ?
In your replies, please kindly take into account that I'm a French newbie with a fair level of ignorance of OSX command line technical slang, however not completely ignorant with computers either (one piece of paper even says I'm an engineer :), it's just that I don't understand what the buffer size technically means here.
Many thanks in advance for your insights !

On this Page:

1: Introduction – About DD Converter

What is DD Converter?

DD Converter is a simple Macintosh application for quickly converting a dd image, supported by most of the computer forensics applications, to Macintosh dmg image. Both dd and dmg are RAW Image Format used to store a disk or volume image. The RAW Image Format is basically a bit-for-bit copy of the RAW data of either the disk or the volume, without any additions or deletions. DD Converter will also perform conversion of split RAW, or multiple segment files.

DD Converter is extremely straightforward to handle. The easy-to-use interface allows the conversion to complete in just a few clicks.

DD Converter Features

Written specifically for Mac OS X, DD Converter includes powerful features that give the investigator a quick and easy way to convert RAW data image between dd format and the Mac OS-centric dmg format.

DD Converter will just perform a rename of the original file and will not affect the HASH value of the file.

2: Getting Started – The Basics of DD Converter

System Requirements

DD Converter is programmed to run on the following minimum specification:

• Intel based Dual Core Apple Macintosh CPU, that is capable of running
• Mac OS X (version 10.6 or above), with at least
• 1 GB of RAM
• Hard Disk (with 30 mb of space free for installation)

Installing or Updating via Download

Once the software has been downloaded from the site and decompressed, the user can drag and drop DD Converter from the mounted disk image into the Applications folder. If prompted to replace the existing version of the file, click Replace.

Initial Setup

The first time the application is launched the user will be asked to accept the End User License Agreement and then to enter a valid registration number.

Having done entering the serial number the user will then be taken to the Main Window.

Finding Help & Technical Support

Should the investigator need assistance working with DD Converter, there are a number of sources through which to get help:

Help within DD Converter

The investigator can find from the Help drop menu, which offers the option to “Show Help”, taking the investigator other relevant web pages on the SubRosaSoft web site.

Technical Support

Our technical support is free via email and can be accessed at the following address: support@subrosasoft.com. The support hours are 10am to 6pm Pacific Standard Time Monday to Friday.

In addition to any support question(s), the investigator must include ALL of the following pieces of information:

• Purchase information.
• System configuration(s) – hard drive make, model etc.
• System OS version.

System related information can be found by using the “System Profiler” application in the /Applications/Utilities folder.

3: Using DD Converter – Navigating the Windows & Using the Functions

The Main Window

Immediately after start-up, the investigator will be presented with the DD Converter splash screen. Once this has disappeared, he or she will then be taken to the ‘Main Window’.

The Layout

W D And D 5 Wall Of Teeth In Dmg Full

The main window layout is extremely straight forward. One button to convert DD image to DMG image and vice versa. Once you click on the Convert DD <-> DMG button, a choose file window will pop up allowing you to select either dd image or dmg image. Click on Open will proceed to convert the image to the other format.

Selecting a dmg image to convert to dd

DD Converter will just perform a rename of the original file and will not affect the HASH value of the file.

4: Appendices – Getting Help and Technical Support

Finding Help within DD Converter

Help can be found both via the standard help menu at the top of the screen.

On the Web

We provide over 100 links to forensic resources, manuals, a complete knowledge base and a plethora of additional information on our website. For updates, resources and additional information please visit: https://www.subrosasoft.com

Technical Support

We provide free technical support both via email or phone during the hours 10am to 6pm Pacific Standard Time (GMT -8) Monday to Friday. By email, we can be reached at the following address: support@subrosasoft.com. By phone, we can be reached at: +1 (510) 870 7883, or by fax on +1 (510) 868 3407.

In addition to any support question(s), the examiner must include ALL of the following pieces of information:

• Valid purchase information.
• System configuration(s) – hard drive make, model etc.
• System OS version.
• System related information can be found by using the “System Profiler” application in the -/Applications/Utilities folder.

Comments and Questions

If you have comments, problems, or questions about this product, or if you are interested in a site license, please contact us via email: info@subrosasoft.com

Company Address:

W D And D 5 Wall Of Teeth In Dmg 2

SubRosaSoft.com Inc.
5387 Diana Common
Fremont, California 94555