Ext4-fs Error File System Corruption
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Ext4 Fs Error Detected Aborted Journal
Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes ext4 fs error journal has aborted a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Recover from a corrupted filesystem when fsck do not help up ext4 fs error raspberry pi vote 3 down vote favorite Something went wrong with my filesystem, Ubuntu set it to read-only and now under Ubuntu Live Disc, fsck can't fix it. I'm running 13.04 and it won't boot - at startup, it just shows the grub rescue prompt. It's a straight-forward setup, just one hard drive on /dev/sda1 but it won't even mount. The install program can see the partition, that it's ext4 and that it's the boot partition. However it
Kernel Ext4 Fs Error
seems that I can't rescue the filesystem by doing an Ubuntu installation with the Ubuntu live disk because it gives no indication whether it's about to overwrite the whole lot so I don't want to risk it. I've got a back-up using backuppc but stupidly I lost my rescue disks. I'd rather avoid a full installation followed by a restore which I've no experience at executing. The crux of the matter is that fsck says it fixes everything but actually doesn't, so the next time I run it, I get exactly the same error messages and fixes. Here's the output: ubuntu@ubuntu:~$ sudo fsck.ext4 -vy /dev/sda1 e2fsck 1.42.8 (20-Jun-2013) ext2fs_check_desc: Corrupt group descriptor: bad block for block bitmap fsck.ext4: Group descriptors look bad... trying backup blocks... Block bitmap for group 0 is not in group. (block 2553887680) Relocate? yes Inode table for group 0 is not in group. (block 2440124416) WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? yes One or more block group descriptor checksums are invalid. Fix? yes Group descriptor 0 checksum is 0x761e, should be 0xcf25. FIXED. Block bitmap for group 4352 is not in group. (block 2553887680) Relocate? yes Inode table for group 4352 is not in group. (block 3731970048) WARNING: SEVERE DATA LOSS POSSIBLE. Relocate? yes Group descriptor 4352 checksum is 0x5eda, should be 0x3da3. FIXED. Inode bitmap for group 4353 is not in group.
Member Registered: 2011-08-20 Posts: 68 EXT4-fs error on boot? [resolved, I hope] On boot, after everything is done except the login prompt I get: ext4 fs error ext4_find_entry Welcome to emergency mode! After logging in, type "journalctl -xb" to view ext4 fs error device system logs, "systemctl reboot" to reboot, "systemctl default" to try again to boot into default mode. Give
Linux Ext4 Fs Error
root password for maintenance (or type Control-D to continue)If I "Crontol-D" and login, then "journalctl -xb" at the end is:EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2947, 29365 clusters http://askubuntu.com/questions/381518/recover-from-a-corrupted-filesystem-when-fsck-do-not-help in bitmap, 29809 in gd; block bitmap corrupt.Jun 03 19:30:01 Dell15z kernel: JBD2: Spotted dirty metadata buffer (dev = sda3, blocknr = 0). There's a risk of filesystem corruption in case of system crash.Jun 03 19:30:01 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2944, 23842 clusters in bitmap, 23846 in gd; block bitmap corrupt.Jun 03 19:30:02 Dell15z https://bbs.archlinux.org/viewtopic.php?id=182364 kernel: JBD2: Spotted dirty metadata buffer (dev = sda3, blocknr = 0). There's a risk of filesystem corruption in case of system crash.Jun 03 19:30:26 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 3089, 16946 clusters in bitmap, 16951 in gd; block bitmap corrupt.Jun 03 19:30:43 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2984, 22332 clusters in bitmap, 25470 in gd; block bitmap corrupt.Jun 03 19:30:44 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2985, 24156 clusters in bitmap, 27958 in gd; block bitmap corrupt.Jun 03 19:30:45 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2986, 29338 clusters in bitmap, 31572 in gd; block bitmap corrupt.Jun 03 19:30:46 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2987, 18034 clusters in bitmap, 32744 in gd; block bitmap corrupt.Jun 03 19:30:46 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2988, 24812 clusters in bitmap, 32715 in gd; block bitmap corrupt.Jun 03 19:30:47 Dell15z kernel: EXT4-fs error (device sda3): ext4_mb_generate_buddy:756: group 2989, 17353 clusters in bitmap, 32767 in gd; block bitmap corrupt
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Next This bug is not in your last search results. Bug42723 - EXT4-fs error: ext4_mb_generate_buddy Summary: EXT4-fs error: ext4_mb_generate_buddy Status: RESOLVED PATCH_ALREADY_AVAILABLE Product: File System Classification: Unclassified Component: ext4 Hardware: All Linux Importance: P1 normal Assigned To: fs_ext4@kernel-bugs.osdl.org URL: http://comments.gmane.org/gmane.comp.... Keywords: Depends on: Blocks: Show dependency tree /graph Reported: 2012-02-03 23:10 UTC by Birger Harzenetter Modified: 2014-08-21 09:21 UTC (History) CC List: 11 users (show) b.schanzel bugzilla-kernel cdomigan jim.bander kernel mai.ling.lists.35 peter.meier+kernel pp sandeen tytso zwu.kernel See Also: Kernel Version: 3.2, 3.2.2, 3.3-rc1 Tree: Mainline Regression: Yes Attachments dmesg (44.38 KB, text/plain) 2014-07-05 08:41 UTC, mai ling Details View All Add an attachment (proposed patch, testcase, etc.) Description Birger Harzenetter 2012-02-03 23:10:45 UTC Repeated or even reproducible occurrences of EXT4-fs error: ext4_mb_generate_buddy Last known good version: 3.1.5 More info on the above URL; possible trigger in the last message. Comment 1 Birger Harzenetter 2012-02-10 01:09:11 UTC Currently using 3.1.7 without issues. Comment 2 Pekka Pietikäinen 2012-02-20 12:12:22 UTC I've potentially seen this with 3.2.1/3.2.5 (Fedora 16) messages-20120219:Feb 16 18:11:40 laptop kernel: [688848.718886] EXT4-fs error (device dm-1): mb_free_blocks:1348: group 28, block 924740:freeing already freed block (bit 7236) messages-20120219:Feb 16 18:11:40 laptop kernel: [688848.718890] EXT4-fs error (device dm-1): mb_free_blocks:1348: group 28, block 924741:freeing already freed block (bit 7237) ... messages:Feb 19 04:46:02 laptop kernel: [106683.790999] EXT4-fs error (device dm-1): ext4_mb_generate_buddy:739: group 311, 15861 clusters in bitmap, 9309 in gd messages:Feb 19 04:46:02 laptop kernel: [106683.874849] EXT4-fs error (device dm-1): ext4_mb_generate_buddy:739: group 321, 30343 clusters in bitmap, 30295 in gd but... the laptop in question is a quite dodgy hardware-wise (wiggle the case a bit and the Thinklight blinks etc.). Typical light laptop use with root/home on LVM the way Fedora puts them by default. So far it's getting ext4 errors every few days, reboot & fsck and it's fine for a wh