ext4 journal, question about levels
There are 3 of them:
Do I understand it correct - "writeback" provides best performance and you can lose data easily. "Journal" provides worst performance and best data protection. "Ordered" is something between them, average.
To mount ext4 is fstab in "journal" mode should I save the line as
Do I need "defaults" here?
you should change that with tune2fs
not in fstab
defaults are needed unless you want to change them
see man mount
This is about ext3, but it should clarify your question.
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