Fortunately, redundant copies of the superblock are stored within a file system. In short each file system has a superblock, which contains information about file system such as. This post describes step by step procedure to resolve bad magic number in super block error while booting up the linux operating system. Bad magic number in superblock while trying to open devsda1.
If you did a mkfs devsda1, when you mount it, you have to use mount devsda1 wherever, not mount devsda wherever. I have tried to format a 2,5 inch ide hd that stems from a satellite receiver. If the device is valid and it really contains an ext2 filesystem and not swap. Bad magic number in superblock while opening filesystem dump. Open a commandline terminal select applications accessories terminal, and then type the following command alternatively you can boot from rescue or live linux cd and. I need to understand what might cause this corruption, because im very much affirmative that something may be wrong with application code. To remove the bad file block, run the fsck command on either a specific partition e. How to resolve bad magic number in superblock error ux. I booted the computer from usb in live mode, ran the following command. Bad magic number in superblock while trying to open devsdb1 the superblock could not be read or does not describe a correct ext2 filesystem. When the superblock of a file system becomes damaged, you must restore it. How to resolve bad magic number in superblock error. Then make sure in your etcfstab file, you refer to devices using uuidxxxxxxxxxxxxxxx instead of devsdxx. Bad magic number in superblock couldnt find valid filesystem superblock.
Bad magic number in superblock while trying to open devsdb devsdb. You can use any one of the following command to find out the superblock location. What you have to do is to edit etcfstab, and check out your linux and swap partitions mounting entries, i believe you just have to change the number of devsdanumber. Bad magic number in superblock while trying to open devsdb1. The number after the b option is to specify the location of. If the device is valid and it really contains an ext2ext3ext4. How to repair a corrupted usb drive in linux make tech. Hence we have chances to use a backup superblock for the fsck command to save the corrupted filesystem. When i run the dumpe2fs command, it told me the superblock had been destroyed.
Since jondriscolls disk is a nonboot disk we dont know if the boot block is as hosed as the superblock, or how much of the disk is messed up as well. Cant repair super block, bad magic number unix and linux forums. The 2829 reallocated sectors are already bad enough that the enough reallocated sectors to declare this disk as failed limit has already been crossed, and the current pending sector count value indicates that the number of reallocated sectors is likely to increase by 65533 as soon as those failed blocks are either overwritten by the computer. Using the info from the first command, fdisk and the uuid number from the second command, blkid, you can work out which device has which uuid number. Backup superblock at 32768, 98304,163840,229376, 294912,819200, 884736,1605632 let me know if any more information required. Once completed, the usb drive will have a healthy partition again and be fully operational on linux. The linux e2fsck is only for checking and fixing errors in filesystem types ext2, ext3 and ext4.
The superblock lives in the 16 disk sectors sectors 1631 that follow the boot block. Couldnt find ext2 superblock, trying backup blocks. Bad magic number in the superblock while trying to open devhdb5 devhdb5. If your system will give you a terminal type the following command, else boot linux system from rescue disk boot from 1st cddvd.
Bad magic number in superblock while trying to open devmapperoneone1. The superblock could not be read or does not describe a valid ext2ext3ext4 filesystem. Repair a broken sd card superblock on a raspberrypi. Bad magic number in superblock while trying to open devsdbthe superblock could not be read or does not describe a valid ext2ext3ext4 filesystem. Bad magic number in superblock while trying to open devsda2 what i think it happened, is that after installing windows your partitions numbers got twisted a bit. I came across a program called testdisk, its used to repair partition tables. Bad magic number in superblock while trying to open devsdel devsdel. How to recover corrupted superblock bad magic number in. Bad magic number in superblock while trying to open. Bad magic number in superblock you cannot e2fsck an entire drive devsdd, so of course you got bad or missing superblock. Try e2fsck for partitions on it, like devsdd1, etc. Bad magic number in the superblock while trying to open devhda1 fsck.
How to resolve bad magic number in superblock error ux techno. Hi, after installing a new linux box i got those errors when running a simple dump. Bad magic number in superblock while trying to open yourvolumegroup couldnt find valid filesystem superblock. Bad magic number in superblock while trying to open devsda5 the superblock could not be read or does not describe a correct ext4 filesystem. Expanding root partition bad magic number in superblock. With command sudo e2label devsdd name i get the message. Sometimes fsck in disks ends up in an error bad magic number in superblock while trying to open devsdb. Why dumpe2fs returns bad magic number in superblock while trying to open devsdx device. This is called primary superblock, because this is the superblock that is read by the system when you mount the file system. Expanding root partition bad magic number in superblock while trying to open devmmcblk0p2 showing 122 of 22 messages. Very often, the bad information in the primary superblock might not have been propagated to the backup superblocks. How would installing windows affect this situation. If the device is valid and it really contains an ext2 filesystem and not swap or ufs or something else, then the superblock is corrupt, and you might try running e2fsck with an alternate.
Linux ext2ext3 superblock recovery kezhongs weblog. If the device is valid and it really contains an ext4 filesystem and not swap or ufs or something else, then the superblock is corrupt, and you might try running e2fsck with an alternate. Repair a broken ext4 superblock in ubuntu linux expresso. Tecgeeks news november 28, 2017 disk, fdisk, linux. I have tried parted magic, but it wont allow to make a new partition. File system type size status information about other metadata structures in detail the superblock is a structure that represents a file syste. The primary copy of superblock is stored in the very first block group. Technology telnet testing third party softwares tips n tricks tomcat ubuntu uncategorized vagrant vicidial virtualbox virtualdrive virtualization vpn. Restoring a bad superblock system administration guide. The magic number of the file system is stored in the superblock. Filefrag tells you how fragmented a file is and e2frag will defragment it. Why dumpe2fs returns bad magic number in superblock. How to recover corrupted superblock bad magic number in superblock on oracle vm repository or poolfs doc id 2127003. Bad magic number in superblock while trying to open devsda6 couldnt find valid filesystem superblock.
Attempting to extend filesystem in rhel 7 returns bad magic number in superblock solution verified updated 20151028t14. Bad magic number in superblock while trying to open devsda1 i dont have any problem to lose all the data on the disk in order to solve this. Bad magic number in superblock while trying to open devmmcblk0p1. If the device is valid and it really contains an ext2ext3ext4 filesystem and not swap or ufs or something else, then the superblock is corrupt, and you might try running e2fsck. If the device is valid and it really contains an ext2 filesystem and not swap or ufs or something else, then the superblock is corrupt, and you might try running e2fsck with an. The superblock could not be read or does not describe a correct ext2 filesystem.
It seems that the installation might have overwritten one of my hard drives and knocked out a partition table or something. Bad magic number in superblock while opening filesystem. Bad magic number in superblock while trying to open devsda the superblock could not be read or does not describe a correct ext2. Bad magic number in superblock while trying to open devhda8. I am getting a cant read superblock error and ubuntu. Bad magic number in superblock while trying to open dev. Bad magic number in superblock serveradminz blog who. As block groups are counted from 0, we can say that the primary superblock is stored at the beginning of block group 0.
Bad magic number in superblock while trying to open devsda5 the superblock could not be read or does not describe a valid ext2ext3ext4 filesystem. Bad magic number in superblock while trying to open devsda2. The problem is that you have are trying to run the resize2fs tool on the whole logical volume, which contains a partition table, and a partition inside the volume first you must resize the partition table by running fdisk on the logical volume then you need to use kpartx to create the mapping from partition inside the volume to a device, like you already did before mounting, and. After cloning the original disk 250gb devsda2 in this disk has about 224gb to a new 500gb disk, i then repartition. Linux new hard drive, bad magic number in superblock super user. You can use fsck o b to replace the superblock with one of the copies. I dont have any problem to lose all the data on the disk in order to solve this.
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