Will converting ext3 to ext4 break backups, resizing, etc?

I want to convert my current filesystem from ext3 to ext4, but I've read elsewhere on this forum that this can (or will?) break automatic backups/restores, automatic resizing, etc. However those posts were all at least several years old.

Has this changed? Will I have any issues converting from ext3 to ext4? Will linode manager just recognize that it's now ext4 and behave accordingly? Or do I need to create a new disk and manually copy everything over?

2 Replies

In most cases everything should work afterwards, but there are a few specific EXT4 settings that our automatic tools don't support, such as EXT4 Metadata Checksums. If you go for the default configuration and make sure that EXT4 Metadata Checksums is disabled then it will likely work for you.

If you run into any problems, try making a new EXT4 disk and move the data over with 'dd'.

Having done this once upon a time, I can confidently testify that, in my experience, the answer to your question(s) is no.

-- sw

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