Arnt Karlsen put forth on 4/22/2011 8:18 AM:

> ..I've had about half a dozen crashes on ext3 where the journal 
> was written to disk but not the data, so the journal trashed my 
> old data "that were gone" according to the journal, on the next 
> fsck.

This is a result of using data=writeback journal mode and has been well
known for a long time.  If you use data=ordered mode (the default on
most distros) the journal isn't written until after the data, which
eliminates the problem you've experienced.

https://ext4.wiki.kernel.org/index.php/Ext3_Data%3DOrdered_vs_Data%3DWriteback_mode

-- 
Stan




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