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Mr. Alex 09-04-2010 06:39 AM

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

/dev/sda2  /      ext4  defaults,data=journal  0  1
Do I need "defaults" here?

amani 09-04-2010 11:58 AM

you should change that with tune2fs

not in fstab

defaults are needed unless you want to change them

see man mount

1 1

salasi 09-05-2010 02:05 PM

This is about ext3, but it should clarify your question.

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