Package: e2fsprogs Version: 1.41.8-1 Severity: important e2fsck -D sometimes corrupts healty ext4 file systems. On one real file system it produces plenty of messages of this form:
Failed to optimize directory /sandbox/fftw3/dft/simd/codelets (58006): No 'next' extent After running e2fsck, the file system still has errors and certain file names become corrupted. Specifically, file FOO tends to be corrupted as FOO~0. I have managed to create a small test case that is farly reproducible on my system. Here are the steps: # create 30G file system amd:~# lvcreate -L 30G -n test amd Logical volume "test" created amd:~# mkfs.ext4 /dev/mapper/amd-test amd:~# mount -o noatime /dev/mapper/amd-test /mnt amd:~# cd /mnt # populate with 10 copies of linux kernel tree. # The tree is at commit 78af08d90b8f745044b1274430bc4bc6b2b27aca # (probably this does not matter) amd:/mnt# for i in `seq 1 10`; do mkdir $i; (cd $i && git clone /scratch/athena/sandbox/linux-2.6); done # prove that the file system is healthy amd:~# umount /mnt amd:~# e2fsck -f -n /dev/mapper/amd-test e2fsck 1.41.8 (11-July-2009) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/mapper/amd-test: 309311/1966080 files (0.1% non-contiguous), 1956119/7864320 blocks # the corruption happens here: amd:~# e2fsck -f -D /dev/mapper/amd-test e2fsck 1.41.8 (11-July-2009) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 3A: Optimizing directories Pass 4: Checking reference counts Pass 5: Checking group summary information Free blocks count wrong for group #0 (15584, counted=15580). Fix<y>? yes Free blocks count wrong for group #16 (16754, counted=16750). Fix<y>? After this, the file system is completely corrupted and e2fsck is completely unable to repair it. -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (900, 'testing'), (800, 'stable'), (10, 'experimental'), (10, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.30-1-amd64 (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/bash Versions of packages e2fsprogs depends on: ii e2fslibs 1.41.8-1 ext2/ext3/ext4 file system librari ii libblkid1 1.41.3-1 block device id library ii libc6 2.9-12 GNU C Library: Shared libraries ii libcomerr2 1.41.3-1 common error description library ii libss2 1.41.3-1 command-line interface parsing lib ii libuuid1 1.41.3-1 universally unique id library e2fsprogs recommends no packages. Versions of packages e2fsprogs suggests: pn e2fsck-static <none> (no description available) pn gpart <none> (no description available) pn parted <none> (no description available) -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
