I also had data loss with ext4. The "feature" responsible for this is delayed allocation.
With delayed allocation on all hd-writes are held back in memory, so if you just cut the power the data is lost.
Basically the old version should be still available, but perhaps ext4 decides that a zeroed file is more "consistent".
I also had data loss with ext4. The "feature" responsible for this is delayed allocation.
With delayed allocation on all hd-writes are held back in memory, so if you just cut the power the data is lost.
Basically the old version should be still available, but perhaps ext4 decides that a zeroed file is more "consistent".