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I've got an Oracle Enterprise Linux system, on which I want to convert an ext3 to ext4 partition. This is also the root partition - and I can't unmount it and run e4fsck in the same session.

Is there a rescue ISO out there with e4fsck? I can't seem to find one.

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Have you tried an Ubuntu Live CD? – SvW Nov 17 '12 at 14:19
Ubuntu Live CD, Debian Netinstall CD, Arch install CD, all have e2fsprogs new enough to understand ext4 – Hubert Kario Nov 17 '12 at 15:03

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Specifically for rescue operation I like to use SystemRescueCd. It is regularly updated and has the latest utilities.

One of the reasons why you are unable to find a rescue CD with e4fsck is because Ext4 was an afterthought in RedHat Enterprise Linux 5 and its derivatives (such as Oracle EL) so they had to package the ext4 capable version of the ext2 utilities with a different name. The latest e2fsck that comes with any recent rescue disk understands the ext4 format perfectly well.

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Great this works, thanks! – Jason Nov 17 '12 at 15:53

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