Resize2fs Fails to Resize Ext4

[scottalanmiller]

You may have run into this error while resizing an existing ext4 partition:

resize2fs /dev/rootvg/lv_root
resize2fs: Filesystem has unsupported feature while trying to open /dev/rootvg/lv_root
Couldn't find valid filesystem superblock.

You will encounter this if you follow Red Hat’s documentation on ext4 resizing. The error comes from a mistake in the documentation. The correct command is resize4fs, not resize2fs for an ext4 filesystem.

resize4fs /dev/rootvg/lv_root

A relatively easy one to fix but not so easy to identify since the official documentation acts like resize2fs will work just fine.

Originally found on my Linux blog in 2012 here: http://web.archive.org/web/20140822224153/http://www.scottalanmiller.com/linux/2012/08/06/resize2fs-fails-to-resize-ext4/