Acronis forces sector by sector for backup of ext4 file system
Recent (~2017) upgrades to Linux systems (Debian, Ubuntu, RedHat) create ext4 file systems with extended options. If you attempt to back up an ext4 file system with extended options using Acronis, Acronis will incorrectly report "Bad blocks" and will force sector by sector backup. This is inconvenient (takes forever and generates huge backup). The solution is to use a Linux tool called "tune2fs" to disable the offending option. Based on my experience the only option that Acronis objects to is "metadata_csum". So backup your partition sector by sector one last time to protect your data. Use these Linux commands running as super user or sudo, replacing XX with the alpha numeric for your partition. e2fsck -f /dev/sdXX tune2fs -O '^metadata_csum' /dev/sdXX e2fsck -f /dev/sdXX The first ef2fsck is required by tune2fs. It won't change the "metadata_csum" option unless this is run first. The tune2fs command with ^ disables the option. The second ef2fsck is to make sure you didn't clobber your file system. The next time you backup your file system, Acronis will do it using normal procedure.


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