Topic: Get smaller ISO image size
started by: xoben
Posted by xoben on Nov. 15 2003,09:33
Firstly, use 'Save As' instead of 'Save' directly. Just as file system in hard disk, when you delete some files from ISO image, the allocated space by the files become empty, and can be re-used by newly added files; but the total image size keeps unchanged. 'Save As' will create a new image, which pack all unused space.Secondly, check 'Optimize' option in 'Properties' dialoge, UltraISO will code same files in different directories only once. This feature can reduce image size dramatically when you are making All-in-one bootable CD or DVD (such as Windows 2000 3in1).
Posted by AL on Apr. 26 2004,05:01
How does UltraISO recognize "same files"?
Posted by xoben on Apr. 26 2004,10:28
same files = same MD5 signature, just act as 'cdimage -o'.
Posted by AL on Apr. 28 2004,12:13
MD5 - that's good!
Posted by astar on May 04 2004,05:31
Thank you very much! This solved my problem!
When I added a new file (quite small, less than 2M) into an existing iso file (almost 550M), UltraISO recognized its size correctly, however, Windows said its size is 0.99G! Oh my God! How can I burn it?! So I used "Save as..." command, and all the new file's attributes seemed correct!
Posted by BennyVL on May 10 2004,12:45
When using "save as" instead of "save",won't it damage the cd structure which certain protections are looking for?
Posted by xoben on May 10 2004,19:32
| Quote (BennyVL @ May 10 2004,17:45) |
| When using "save as" instead of "save",won't it damage the cd structure which certain protections are looking for? |
Yes, 'Save As' will create new CD structure for packing data to much smaller size.