Talk:Dd vs UNetbootin

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Another advantage for UNetbootin that should be added to the list is that it could install several OSes (operating systems) in a USB. Once, I even had up to 4 OSes and 1 extra partition for storing data (1 Parted Magic, 2 Linux Mint, 3 PCLinuxOS, 4 an extended partition for 5 and 6, 5 Slitaz, 6 a partition for data). And I could switch to any one of four OSes whenever I wanted to. The the extra steps I needed to do this is the following (you need to already know how to use UNetbootin to be able to do this):

WARNING: If your USB is not empty, back up any important data you don't want to lose like photos, documents, etc. Make sure you're not mistaking your USB with your hard disk.

1 Install an OS or CD image unto an empty/unused partition in the USB with UNetbootin. (go to step 3 if you have no empty partition)

2 Installing the OS will use up some space, but there will be unused space left.

3 Use GParted (by GNU) or any other partition manager program to remove all of the unused partition space by reducing the size of the partition so that it is converted into free space.

4 Create a new partition in this free space and make sure the free space is big enough to install the next OS.

5 Install the next OS or CD image unto the new partition again with UNetbootin. (same as step 1)

6 Keep on repeating these steps until you have installed all your OSes or you have no more free space. (Remember partition 1-4 are primary partitions, 5 and higher are logical partitions and logical partitions can only be used if one of the primary partitions is converted into an extended partition where the logical partitions will reside.)

To be able to switch between the OSes you must toggle the bootable flag using GParted (or other partition managers), turning it on for the OS you want to use and turning it off for the other OSes. By doing this, the next time your system boots/reboots, it will automatically boot into the OS with the bootable flag.-- 08:09, 9 March 2011 (UTC)

Sorry, I'm the person who wrote the post above. I just realized that MultiSystem (found here) is much easier than UNetbootin, because only one partition is required for multiple OSes, so that steps 2,3 and 4 are not required. Toggling the bootable flag would also be unnecessary, since OS selection would be offered by grub2 during the booting process. However, the website is in French, so it has to be translated first (unless you understand French), but the program is available in English.-- 16:48, 10 March 2011 (UTC)