![]() ![]() Jul 20 08:01:21 localhost kernel: EXT4-fs (sdd1): error loading journal Jul 20 08:01:21 localhost kernel: JBD: Unrecognised features on journal In some cases useful info is found in syslog - try Missing codepage or helper program, or other error Mount: wrong fs type, bad option, bad superblock on /dev/sdd1, However the partition still fails to mount, although I don't get the "unsupported optional features (400)" message any more: $ sudo mount /dev/sdd1 /mnt/disk1 Sudo /home/user/bin/tune2fs -O ^metadata_csum /dev/sdd1 Initial Googling suggested that the issue was due to the metadata checksum feature, so I downloaded and compiled the latest e2fsprogs (1.46-WIP (2)) and used those to disable the feature: sudo /home/user/bin/e2fsck -f /dev/sdd1 I have full root access to the server, but I am unable to upgrade any of the operating system components due to compatibility issues with the running software. Localhost kernel: EXT4-fs (sdd1): error loading journal Localhost kernel: JBD: Unrecognised features on journal However when trying to mount the partition on the server I get the errors: localhost kernel: EXT4-fs (sdd1): couldn't mount RDWR because of unsupported optional features (400) ![]() The Ext4 Howto states that "Ext4 was released as a functionally complete and stable filesystem in Linux 2.6.28" so I assumed I was going to be able to just mount the partition. The server is running CentOS 6.10 with kernel 2.6.32. I created an ext4 partition on Ubuntu 18.04.4 LTS in order to transfer a large amount of data to a production server. ![]()
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