heya guys, messing around with a test install on an older machine and wanted to check out ext4.

I changed an ext3 partition to ext4dev in fstab with extents under options.
It automounts in the 2.6.24-1 kernel fine but with the 2.6.25-1 kernel I installed with aptitude after the change it doesnt. It acts as if the partition isn't there, it says "not marked OK to use with test code"

I know its still in development but this really seems like something Im just doing wrong

Any help would be cool.

At some point the developers plan to change the name ext4dev to ext4. Maybe they did so with 2.6.25-1. Try using ext4 instead of ext4dev and see what happens.

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Steve Stites

Thanks man, but found the answer here:
http://fedoraproject.org/wiki/FedoraExt4

prettymuch you need to use the debugfs command to manually change the FS to allow for a test filesystem to load.

A new feature in the 2.6.25 kernels and up. Before that kernel version you had to specify for it to use the new extents option, which will make prettymuch full use out of the new filesystem, but in the process makes it no longer compatible with ext3 but in the 2.6.25+ kernels it automatically uses extents, so they made it so it couldn't accidentally be loaded as ext4 by accident without you manually doing that process.