Public bug reported:
I'm running gprecise and have e2fsprogs 1.42-1-ubuntu2 installed.
I ran e2fsck -E discard /dev/sdb1 and it destroyed much of the
filesystem.
I believe the bug that causes data loss is fixed in e2fsprogs 1.42.2.
Related upstream changelog entry follows:
E2fsck has a number of bugs relating to discard that have been fixed.
(1) Fixed a bug which could cause e2fsck to discard portions of the
inode table which were actually in use. (2) E2fsck will now avoid using
discard if the block device doesn't zero data on discard, since
otherwise this could cause problems if the file system gets corrupted in
the future. (3) E2fsck will now avoid using discard when it is run in
read-only mode. (4) Fixed a bug which caused e2fsck to not issue
discards in the last block group.
Is it possible to bump e2fsprogs to 42.2?
antarus@goats4 ~ $ apt-cache policy e2fsprogs
e2fsprogs:
Installed: 1.42-1ubuntu2
Candidate: 1.42-1ubuntu2
Version table:
*** 1.42-1ubuntu2 0
600 http://ubuntu-precise.mirror.corp.google.com/ubuntu/ precise/main
amd64 Packages
100 /var/lib/dpkg/status
antarus@goats4 ~ $ lsb_release -rd
Description: Ubuntu 12.04.1 LTS
Release: 12.04
I expect the discard option to not cause data loss.
** Affects: e2fsprogs (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1083217
Title:
Please backport -E discard fixes to e2fs-progs in precise
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