linux-ext4 - Re: Reg: logical volume file system is getting corrupted after multiple reboots.

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Date:   Tue, 1 May 2018 10:34:45 +0530
From:   RAJESH DASARI <raajeshdasari@...il.com>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: Reg: logical volume file system is getting corrupted after
 multiple reboots.

Thanks for your reply , please find my response in line.

Thanks,
Rajesh Dasari.


On Tue, May 1, 2018 at 2:39 AM, Andreas Dilger <adilger@...ger.ca> wrote:
> On Apr 30, 2018, at 12:27 PM, RAJESH DASARI <raajeshdasari@...il.com> wrote:
>>
>> Hi ,
>>
>> We are noticing an issue with logical volume file system is getting
>> corrupted after restarting the machine for multiple times.
>>
>> This issue we have started noticing after upgrading the kernel to 4.4.121 from 4.4.106.
>>
>> while running tune2fs -c 1 /dev/VG_NEW/state to set the
>> mmax_mounts_count we are noticing the error.
>>
>> tune2fs -c 1 /dev/VG_NEW/state
>> tune2fs 1.44.0 (7-Mar-2018)
>> tune2fs: The ext2 superblock is corrupt while trying to open /dev/VG_NEW/state
>> Couldn't find valid filesystem superblock.
>>
>> lvs command output is below (there are other logical volumes and
>> volume groups also along with state volume, I have not pasted them to
>> minimize this post).

> Are you sharing this volume group between multiple hosts/VMs or similar?
>
> Cheers, Andreas
No , This logical volume is not shared by other hosts and today i
noticed that corruption is seen on other logical volumes also not only
on state volume group. other logical volumes are also not shared.
>
>> lvs
>>
>>  LV                                                            VG
>>   Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync
>> Convert
>>
>>  state                                                         VG_NEW
>> -wi-a----- 1000.00m
>>
>> blkid command output is below
>>
>> blkid
>> /dev/mapper/VG_NEW--state: LABEL="state"
>> UUID="57f82106-3fd2-4d8c-9cbe-676dc58d5405" SEC_TYPE="ext2"
>> TYPE="ext3"
>> /dev/mapper/VG_NEW--backup: LABEL="backup"
>> UUID="2771bdac-f005-4bde-88a1-5ace80faa89f" SEC_TYPE="ext2"
>> TYPE="ext3"
>> /dev/mapper/VG_NEW--ErrorInformation: LABEL="ErrorInformati"
>> UUID="e5f18c5a-aec8-498a-8feb-b81686bf2ff9" SEC_TYPE="ext2"
>> TYPE="ext3"
>>
>> please find the output of mount command.
>>
>> mount -o noatime -t ext4 /dev/VG_NEW/state /mnt/state
>> [  271.786492] EXT4-fs (dm-0): ext4_check_descriptors: Block bitmap
>> for group 0 not in group (block 64)!
>> [  271.795731] EXT4-fs (dm-0): group descriptors corrupted!
>> mount: mounting /dev/VG_NEW/state on /mnt/state failed: Structure needs cleaning
>> -bash-4.4#
>>
>> when i tried to recover , recovery was successful but after multiple
>> reboots we have seen this issue again.
>> please find the output of e2fsck
>>
>> e2fsck -f -y /dev/VG_NEW/state
>> e2fsck 1.44.0 (7-Mar-2018)
>> ext2fs_open2: The ext2 superblock is corrupt
>> e2fsck: Superblock invalid, trying backup blocks...
>> 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
>> Free blocks count wrong for group #0 (28095, counted=24283).
>> Fix? yes
>>
>> Free blocks count wrong for group #2 (32266, counted=32128).
>> Fix? yes
>>
>> Free blocks count wrong for group #6 (32266, counted=32029).
>> Fix? yes
>>
>> Free blocks count wrong (243372, counted=243370).
>> Fix? yes
>>
>> Free inodes count wrong for group #0 (7989, counted=7988).
>> Fix? yes
>>
>> Free inodes count wrong for group #2 (8000, counted=7829).
>> Fix? yes
>>
>> Directories count wrong for group #2 (0, counted=37).
>> Fix? yes
>>
>> Free inodes count wrong for group #6 (8000, counted=7881).
>> Fix? yes
>>
>> Directories count wrong for group #6 (0, counted=52).
>> Fix? yes
>>
>> Free inodes count wrong (63700, counted=63698).
>> Fix? yes
>>
>>
>> state: ***** FILE SYSTEM WAS MODIFIED *****
>> state: 302/64000 files (2.6% non-contiguous), 12630/256000 blocks
>> -bash-4.4#
>>
>> Could you please suggest what could be the cause for this issue.
>> Please provide pointers on how to proceed.
>>
>>
>>
>> Thanks,
>> Rajesh Dasari.
>
>
> Cheers, Andreas
>
>
>
>
>