To be clear, I'm seeing the problem, but the checkbox *is* checked for me: 1) Select an ext4 partition 2) Click "Change..." 3) Set "use as" to ext2 4) Do not check the "Format the partition" checkbox 5) Specify a mount point. 6) Click OK
At this point, the "Format?" column now has a tick against the ext4 filesystem with type shown as "ext2". The problem seems to manifest itself if you specify a partition to be mounted as a different type to how it was originally formatted. Examples: - If you format a partition to ext4, and mount it as ext4 but select do not format, ubiquity will not reformat. - If you format a partition to ext4, and mount it as ext2 but select do not format, ubiquity will silently reformat (as reported). - If you format a partition to ext4, and mount it as ext3 but select do not format, ubiquity will silently reformat. - If you format a partition to ext2, and mount it as ext3 but select do not format, ubiquity will silently reformat. What is happening is that /lib/partman/choose_method/25filesystem/do_option is iterating through the list of valid filesystems. Here, we have a scenario where the existing partition is ext4 and the user has selected ext2. Since the FS types do not match ($existing is 'no'), it decides that the partition needs to be formatted. Normally, this would be an entirely reasonable outcome but for the fact that: - ext4 is backwards compatible with ext3 and ext2. - ext3 is backwards compatible with ext2. One solution therefore would be to add logic to /lib/partman/choose_method/25filesystem/do_option to special-case ext* filesystems and only reformat if attempting to mount say ext2 as ext4. However, clearly, ubiquity also needs to ask for user confirmation before reformatting. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/684309 Title: Ubiquity Advanced Partitioning - Converting/Using ext4 to ext2 without formating formats the partition without warning To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/684309/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
