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1. You can also find the superblock with. mkfs.ext4 -n /dev/sda mkfs.ext2 -n /dev/sda. (pick ext4/ext2 if your system is ext4/ext2; REPLACE sda with your disk). From the manual: -n Causes mke2fs to not actually create a filesystem, but display what it would do if it were to create a filesystem. This can be used to determine the location of the. Superblock backups stored on blocks Writing superblocks and filesystem accounting information: done. This filesystem will be automatically checked every 31 mounts or. 180 days, whichever comes first. My problem was that my Ubuntu system would not boot (under a multi-boot scenario) and couldn't be mounted from a different Linux system. In a live session gparted reported bad superblock. I have followed this solution here, but the first step was enough for me. In a live environment I did something like. Ubuntu MATE is an impressive lightweight Linux distro that runs fast enough on older computers. It features the MATE desktop - so the user interface might seem a little different at first but it's easy to use as well. In addition to the desktop support, you can also try it on a Raspberry Pi or Jetson Nano. 論壇 › Linux › can't read superblock. 頁: [1] mojamoja1202 發表於 2014-2-20 10:33 PM can't read superblock 因小弟想把伺服器的資料定期備份到一台nas上 ... mount: //xxx.xx.xxx.xxx/nas/web: can't read superblock. Most damage to the superblock cannot be repaired. The following procedure describes how to repair a superblock in a JFS file system when the problem is caused by a corrupted magic number. If the primary superblock is corrupted in a JFS2 file system, use the fsck command to automatically copy the secondary superblock and repair the primary. Run fsck on Linux Root Partition. To do so, power on or reboot your machine through the GUI or by using the terminal: sudo reboot. Press and hold the shift key during boot-up. . Select Advanced options for Ubuntu. Then, select the entry with (recovery mode) at the end. . Select fsck from the menu. Under Linux, execute the command: syslinux [-s] [-o offset] /dev/fd0 (or, again, whichever device is the correct one.) This will alter the boot sector on the disk and copy a file named LDLINUX.SYS into its root directory. The -s option, if given, will install a "safe, slow and stupid" version of SYSLINUX.

To: [email protected], [email protected]; Subject: [PATCH AUTOSEL 5.15 13/17] ext4: fix warning when submitting superblock in ext4_commit_super(); From: Sasha Levin <[email protected]>; Date: Tue, 21 Jun 2022 16:50:36 -0400; Cc: Zhang Yi <[email protected]>, Hulk Robot <[email protected]>, Jan Kara <[email protected]>, Ritesh Harjani <[email protected]>, "Theodore Ts'o" <tytso. I've scoured dozens of threads about the topic and have hit a wall, so any advice is | The UNIX and Linux Forums. 222 The UNIX and Linux Forums . Forum Home. Linux and Unix Man Pages. Search Forums ... 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736. Most damage to the superblock cannot be repaired. The following procedure describes how to repair a superblock in a JFS file system when the problem is caused by a corrupted magic number. If the primary superblock is corrupted in a JFS2 file system, use the fsck command to automatically copy the secondary superblock and repair the primary. . The filesystem size (according to the superblock) is 10585760 blocks The physical size of the device is 10577568 blocks Either the superblock or the partition table is likely to be corrupt! As you can see the physical device size is less than filesystem size. So you need to set filesystem size less or equal to physical: resize2fs /dev/<dev. Backup superblock at 229376, Group descriptors at 229377-229378 Backup superblock at 294912, Group descriptors at 294913-294914 Backup superblock at 819200, Group descriptors at 819201-819202 Backup superblock at 884736, Group descriptors at 884737-884738 Backup superblock at 1605632, Group descriptors at 1605633-1605634. Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this. So trying the xfs_repair -L option gets me to the situation I can't get beyond: $ sudo xfs_repair -L /dev/sdb6 Phase 1 - find and verify superblock... superblock read failed, offset 382252089344, size 131072, ag 89, rval -1 fatal. You can use any one of the following command to find out the superblock location: [a] mke2fs - Create an ext2/ext3/ext4 filesystem. [b] dumpe2fs. - dump ext2/ext3/ext4 filesystem information. Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following command (alternatively you can boot from rescue or Live Linux CD and type the same commands):.

Browse other questions tagged linux encryption filesystems ubuntu-14.04 superblock or ask your own question. The Overflow Blog Our favorite features and updates from WWDC (Ep. 454). If you encounter an error while installing the wrong Ubuntu superblock on your PC, we hope this user guide will help.Hence the error when evaluating "wrong fs type [...]": there is no filesystem at the location you specified. In this case, you can install third party software while mounting the file system. For this I havethere is a completely different process in which the bad superblock is replaced by the block involved in the alternatives. Browse other questions tagged linux encryption filesystems ubuntu-14.04 superblock or ask your own question. The Overflow Blog Our favorite features and updates from WWDC (Ep. 454). The art of computing based on my experience: open source and freeware software reviews, configurations, tutorials, howtoes, virtualization, for both Windows and Linux, hardware reviews, problems and relative solutions, tips and tricks, and everything else I. After restarting my server today, I attempted to restart my 4 disk mdadm RAID 5 array as follows. $ mdadm --assemble /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 mdadm: no recogniseable superblock on /dev/sdb1 mdadm: /dev/sdb1 has no superblock - assembly aborted Obviously, this is bad, it appears somehow when I restarted it managed to. [email protected]:~$ sudo fsck -v /dev/sda1 fsck from util-linux 2.20.1 e2fsck 1.42.9 (4-Feb-2014) ext2fs_open2: Bad magic number in super-block fsck.ext2: Superblock invalid, trying backup blocks... fsck.ext2: Bad The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem. If our primary superblock is corrupted or unusable we can use alternative superblocks. List Super Blocks. To mount with an alternative superblock we will list superblocks and alternatives. $ dumpe2fs /dev/vda1 |grep -i superblock List Super Blocks. To run dumpe2fs command we need root privileges. We grep only superblock related line of the output. diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index 91c8146649f5..5d480797cf53 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm.

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