ecryptfs team mailing list archive

[Theodore Ts'o <tytso@xxxxxxx>]

@Volodymyr,

Oh, about your scenario --- the hiberate scripts *should* be doing a
sync before putting your laptop to sleep, so you shouldn't be losing any
files if the problem is failing to wake up after a hibernate.  (Me, I'm
still paranoid about whether the hibernation scripts work correctly, so
I tend to quiesce the filesystem -- i.e., ^Z any compiles -- and
manually run sync by hand.)  In any case, if your only concern is
crashes caused by hibernate, you should be OK --- again, assuming the
hibernate are properly calling sync before going to sleep --- and if
they aren't, that's a bug that should be fixed.

Your probability analysis also doesn't take into account the probability
of a file write happening 45-120 seconds before the crash, using an
application that isn't properly using fsync(), such that you lose a file
that takes "hours" to recover.    People to date have complained about
state files written by desktop applications --- in some cases the
failure is as simple as not remembering the size and position of the
window where the application was last opened.

-- 
Ext4 data loss
https://bugs.launchpad.net/bugs/317781
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Status in “ecryptfs-utils” source package in Ubuntu: Invalid
Status in “linux” source package in Ubuntu: Confirmed
Status in ecryptfs-utils in Ubuntu Jaunty: Invalid
Status in linux in Ubuntu Jaunty: Confirmed

Bug description:
I recently installed Kubuntu Jaunty on a new drive, using Ext4 for all my data.

The first time i had this problem was a few days ago when after a power loss ktimetracker's config file was replaced by a 0 byte version . No idea if anything else was affected.. I just noticed ktimetracker right away.

Today, I was experimenting with some BIOS settings that made the system crash right after loading the desktop. After a clean reboot pretty much any file written to by any application (during the previous boot) was 0 bytes.
For example Plasma and some of the KDE core config files were reset. Also some of my MySQL databases were killed...

My EXT4 partitions all use the default settings with no performance tweaks. Barriers on, extents on, ordered data mode..

I used Ext3 for 2 years and I never had any problems after power losses or system crashes.

Jaunty has all the recent updates except for the kernel that i don't upgrade because of bug #315006

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-4-generic 2.6.28-4.6
ProcCmdLine: root=UUID=81942248-db70-46ef-97df-836006aad399 ro rootfstype=ext4 vga=791 all_generic_ide elevator=anticipatory
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.28-4.6-generic
SourcePackage: linux