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Which ext4 features are missing on an upgraded filesystem?
Fresh5 days ago
Mar 15, 2026307 viewsConfidence Score0%
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Problem
Which features will be missing on a filesystem upgraded from to using the instructions here? The text explains: There are additional ext4 features, such as flex_bg and > 16TB filesystem support that can only be enabled at format time via mke2fs. The "such as" implies there are other features too. D…
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ext4
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Fix for: Which ext4 features are missing on an upgraded filesystem?
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extents are one of them too, only new files will be created in extents format. In any case if you can reformat the partition rather than upgrade it, it's better to do so, fragmentation will get back to approximately 0 whatever the amount you have on…
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