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Difference between revisions of "Disk Image Formats"
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The UDRW Image is an UDIF read/write image which can be mounted on Mac OS X. |
The UDRW Image is an UDIF read/write image which can be mounted on Mac OS X. |
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| − | UDRW Images can be converted to zlib-compressed read-only UDZO Images with the hdiutil on Mac |
+ | UDRW Images can be converted to zlib-compressed read-only UDZO Images with the hdiutil on Mac OS X: |
<pre>hdiutil convert -format UDZO udrw.dmg -o udzo.dmg</pre> |
<pre>hdiutil convert -format UDZO udrw.dmg -o udzo.dmg</pre> |
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| − | To add checksums of the data in the provided |
+ | To add checksums of the data in the provided UDZO Image and store them in the image the asr tool on Mac OS X can be used: |
<pre>asr -imagescan udzo.dmg</pre> |
<pre>asr -imagescan udzo.dmg</pre> |
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Revision as of 01:36, 16 July 2009
iPhone Firmware (ipsw) files contain .dmg disk images beside other files.
The main filesystem .dmg disk image (the largest .dmg file) is decrypted to an UDZO .dmg disk image.
UDZO Image Format
The UDZO Image is an UDIF zlib-compressed read-only image which can be mounted on Mac OS X. UDZO Images can be converted to read/write UDRW Images with the hdiutil on Mac OSX:
hdiutil convert -format UDRW -o udrw.dmg udzo.dmg
UDRW Image Format
The UDRW Image is an UDIF read/write image which can be mounted on Mac OS X. UDRW Images can be converted to zlib-compressed read-only UDZO Images with the hdiutil on Mac OS X:
hdiutil convert -format UDZO udrw.dmg -o udzo.dmg
To add checksums of the data in the provided UDZO Image and store them in the image the asr tool on Mac OS X can be used:
asr -imagescan udzo.dmg
