Is there a bad magic number in resize2fs? resize2fs: Bad magic number in super-block while trying to open. fsck reports an invalid superblock: $ sudo fsck.ext4 /dev/sdb1 e2fsck 1.42 (29-Nov-2011) fsck.ext4: Superblock invalid, trying backup blocks. What is Bad magic number? bad super block: magic number wrong look for alternate superblocks? Phase 1 - find and verify superblock. I don't have any problem to lose all the data on the disk in order to solve this. 3. Running a standard fsck results in the abo. hpserv220:/ # any suggestions how to resovle this? Ask Question Asked 7 years, 6 months ago. Alternate super block location: 34693152 ** /dev/ad0s1e BAD SUPER BLOCK: MAGIC NUMBER WRONG Running FreeBSD 4.6 on PIII 450 The System has 2 drives Root is at /dev/da0 a 4.3 GB SCSI drive And I am missing my /var that was on a 20GB IDE drive /dev/ad0 So I still can not fix or mount the /dev/ad0s1e drive. Bad superblock : magic number wrong ! Specific reasons for a damaged super block include: a wrong magic number, an out-of-range number of cylinder groups (NCG) or cylinders per group (CPG), the wrong number of cylinders, a preposterously large super block size, and trashed values in super block. The root filesystem on /dev/sda1 requires manual fsck. Bad magic number, appears whenever the header (magic number in python) of the compiled byte-code is either corrupted or when you try to running a pyc from a different version of python (usually later) than your interpreter. Unmount the file system. To: debian-user@lists.debian.org. After extending a virtual drive on VMWare, I had to add the additional disk space to the logical volume. Modified 5 months ago. It has a bad primary superblock - bad magic number and is not able to find a secondary superblock to use. 807559 Member Posts: 50,786. Use the od command to check the secondary superblock for a correct magic number. Nov 2, 2001 12:30PM edited May 28, 2003 6:07AM in Installation. Click on "Volumes" Find the broken volume. watch question. Nov 2, 2001 12:30PM edited May 28, 2003 6:07AM in Installation. # newfs -N /dev/rdsk/ device-name. Hello list, I am running woody with 2.4.19 and xfs patch for 2.4.19 from SGI ftp site. And whatever the problem actually is, /dev/sdc1 seems to have . Caution - If a file system with a damaged superblock was created with newfs or mkfs customized parameters, such as ntrack or nsect, using fsck's automatically calculated superblock for the repair process could irreparably damage your file system. How fix super block bad magic number? It's really annoying that the leopard disk that I bought doesn't copy and doesn't install. Partition cannot be mounted on Android but will mount RW w/ su on Linux Live. attempting to find secondary superblock... and no good secondary superblock is found. Then when i mounted a hd again in a SunBlade 100 i've found This magic number is used by OS to determine which is the file system related to disk /dev/sdb [[email protected] ~]# dumpe2fs -h /dev/sdb |grep -i magic dumpe2fs 1.42.9 (28-Dec-2013) Filesystem magic number: 0xEF53 In the case of a file system that was created with customized parameters and it has a bad superblock, fsck provides the following prompt to cancel . Basically it give no information beyond that. I have added the multipath -l and /etc/multipath.conf to . - user1666203. Technical Notes. Subject: xfs_repair: bad primary superblock - bad magic number !!! comment. 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 . Display the superblock values with the newfs -N command. fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb1 and e2fsck reports a similar error: In the case of a file system that was created with customized parameters and it has a bad superblock, fsck provides the following prompt to cancel . Re: fsck --> Bad Super Block: Magic Number Wrong. I am running mandrake 8.2 and when booting I get the message: e2fschk: Bad magic number in super-block while trying to open /dev/hda8. What is the difference between fsck and e2fsck? asker certified solution . might be too old to make sense of it. Sep 9, 2015 at 18:15. See above for edits. If all defaults were taken when the file system was created, the magic number should be 0x43218765. question: q: bad super block: magic number wrong look for alternate superblocks? - user1666203. Ask Question Asked 7 years, 6 months ago. But the messages from dmesg indicate that these filesystems may have been created with a newer version of XFS driver/tools, and the driver version in your CentOS/RHEL system (which one it is, really?) If anything goes wrong, you will still have the original image. 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 . Very often, the bad information in the primary superblock might not have been propagated to the . It says it can't the superblock, when I make suggestions I get the above message 'Bad super block': magic number wrong'. - Jesse K. Sep 9, 2015 at 20:39. My mistake, focusing on the wrong detail. firstly,ensure you are using the raw device, i.e. secondly are you sure it is HFS? The fact that you use fsck on the original image suggests that you have, at one point, formatted it as ext2/3/4. fsck is a wrapper that identifies the specific tool to use to analyze/repair a filesystem that . Im running a multi drive enclosure via FW400 and one of the drives is a 750Gb partitioned into two partitions, roughly half and half. I booted the computer from USB in live mode and ran the following command: sudo dumpe2fs /dev/sda1. firstly,ensure you are using the raw device, i.e. 1 Reply wrong magic number; If the primary superblock of any filesystem [ referenced in the vfstab, to automatically mount during booting ] is corrupted, the system will fail fsck during bootup with the following message: BAD MAGIC NUMBER MAGIC NUMBER WRONG. hpserv220:/ # fsck /dev/vg06/rlvol4 ** /dev/vg06/rlvol4 BAD SUPER BLOCK: MAGIC NUMBER WRONG USE -b OPTION TO FSCK TO SPECIFY LOCATION OF AN ALTERNATE SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(1M). Used: $ fsck -b 32768 /dev/sda6 to fix. hpserv220:/ # fsck /dev/vg06/rlvol4 ** /dev/vg06/rlvol4 BAD SUPER BLOCK: MAGIC NUMBER WRONG USE -b OPTION TO FSCK TO SPECIFY LOCATION OF AN ALTERNATE SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(1M). then I get Bad SuperBlock at 20350880: Magic number wrong. How is the VFS superblock synchronized with the super block in the disk? yes search for alternate super-block failed. Any idea where there might be another valid copy of the superblock? This magic number is used by OS to determine which is the file system related to disk /dev/sdb [root@sss ~]# dumpe2fs -h /dev/sdb |grep -i magic dumpe2fs 1.42.9 (28-Dec-2013) Filesystem magic number: 0xEF53 First make a copy of the image and work on that copy. EXT4 app2sd link2sd partition repair with bad superblock . OK, it looks like /dev/sdb is in fact partitioned, and so /dev/sdb1 is the right device to use. How to resolve bad magic number in super-block error? attempting to find secondary superblock... and no good secondary superblock is found. 1. ext4 - Bad magic number in super-block. Bad magic number, appears whenever the header (magic number in python) of the compiled byte-code is either corrupted or when you try to running a pyc from a different version of python (usually later) than your interpreter. Change to a directory outside the damaged file system. thanks. What is super block concept? Then when i mounted a hd again in a SunBlade 100 i've found Where are super blocks . The superblock could not be read or does not describe a correct ext2 filesystem. This magic number is used by OS to determine which is the file system related to disk /dev/sdb [root@sss ~]# dumpe2fs -h /dev/sdb |grep -i magic dumpe2fs 1.42.9 (28-Dec-2013) Filesystem magic number: 0xEF53 fsck.ext2: Bad magic number in super-block while trying to open /dev/sdb2 The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem. The original superblock is gone, but there may be valid backups. From: Patrick Hsieh < pahud@ezplay.tv >. Bad superblock : magic number wrong ! What does Super block signify? Become superuser. bad primary superblock - bad magic number !!! Specific reasons for a damaged super block include: a wrong magic number, an out-of-range number of cylinder groups (NCG) or cylinders per group (CPG), the wrong number of cylinders, a preposterously large super block size, and trashed values in super block. So, I'm a bit stuck. fsck.ext3: Bad magic number in super-block while trying to open /dev/sdb2 The superblock could not be read or does not describe a correct ext2 filesystem. So, I'm a bit stuck. Red Hat Product Security Center Engage with our Red Hat Product Security team, access security updates, and ensure your environments are not exposed to any known security vulnerabilities. See above for edits. Click on "Volumes" Find the broken volume. bad magic number in superblock. Use. It's really annoying that the leopard disk that I bought doesn't copy and doesn't install. I am trying to resize a logical volume on CentOS7 but am running into the following error: resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block while trying to open /dev . Viewed 452k times 200 82. - got just the "Bad magic number in super-block while trying to open…" message used $ mke2fs -n /dev/sda6 got the 2nd super block same as in the example. xfs_repair: bad primary superblock - bad magic number !!! Any idea where there might be another valid copy of the superblock? What is "Bad magic number in superblock"? What is "Bad magic number in superblock"? Red Hat Product Security Center Engage with our Red Hat Product Security team, access security updates, and ensure your environments are not exposed to any known security vulnerabilities. Very often, the bad information in the primary superblock might not have been propagated to the . In the preceding output, note the corrupted magic value at 0x1000 ( 1234 0234 ). resize2fs: Bad magic number in super-block while trying to open. fsck.ext2: Bad magic number in super-block while trying to open /dev/sda1 The superblock could not be read or does not describe a correct ext2 filesystem. Phase 1 - find and verify superblock. The magic number of the file system is stored in the Superblock. failing that, I am not sure there is much more to do. Basically it give no information beyond that. - Jesse K. Sep 9, 2015 at 20:39. If you wish to run in yes mode using the alternate superblock run . Don't panic, this is what you have to do next to solve this issue: Go to your AWS dashboard, EC2 section. Viewed 452k times 200 82. I'm running: fsck -n /dev/sdb2 and I'm getting: fsck from util-linux 2.31.1 e2fsck 1.44.1 (24-Mar-2018) ext2fs_open2: Bad magic number in super-block fsck.ext2: Superblock invalid, trying backup blocks. It says it can't the superblock, when I make suggestions I get the above message 'Bad super block': magic number wrong'. Alternate super block location: 34693152 ** /dev/ad0s1e BAD SUPER BLOCK: MAGIC NUMBER WRONG Running FreeBSD 4.6 on PIII 450 The System has 2 drives Root is at /dev/da0 a 4.3 GB SCSI drive And I am missing my /var that was on a 20GB IDE drive /dev/ad0 So I still can not fix or mount the /dev/ad0s1e drive. I am running mandrake 8.2 and when booting I get the message: e2fschk: Bad magic number in super-block while trying to open /dev/hda8. Can I recover a 500GB Seagate Momentus with bad sectors? Hi, I've umounted a SunBlade 100 ide ATA II disk , and put into a linux box who can only read ufs. Technical Notes. Date: Tue, 24 Sep 2002 17:15:21 +0800. wrong magic number; If the primary superblock of any filesystem [ referenced in the vfstab, to automatically mount during booting ] is corrupted, the system will fail fsck during bootup with the following message: BAD MAGIC NUMBER MAGIC NUMBER WRONG. fsck is a wrapper that identifies the specific tool to use to analyze/repair a filesystem that . Caution - If a file system with a damaged superblock was created with newfs or mkfs customized parameters, such as ntrack or nsect, using fsck's automatically calculated superblock for the repair process could irreparably damage your file system. /dev/vg02/rlvol2. 2. Re: fsck --> Bad Super Block: Magic Number Wrong. Sep 9, 2015 at 18:15. Should have used "-a" option to automatically accept fixes because it had a gazillion complaints and I had to lean on the "y" key for 20 . I am trying to resize a logical volume on CentOS7 but am running into the following error: resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block while trying to open /dev . share. If any defaults were overridden, the magic number should be 0x65872143. I have added the multipath -l and /etc/multipath.conf to . What is the difference between fsck and e2fsck? 1. Provide an alternative superblock with the fsck command. you must use the-b option to fsck to specify the location of an alternate super-block to supply needed information; see fsck(8). Don't panic, this is what you have to do next to solve this issue: Go to your AWS dashboard, EC2 section. After adding adding the space, you need to resize the file system. /dev/vg02/rlvol2. The magic number of the file system is stored in the Superblock. The magic number of the file system is stored in the Superblock. bad primary superblock - bad magic number !!! failing that, I am not sure there is much more to do. hpserv220:/ # any suggestions how to resovle this? and get Bad Superblock at block 16: Number of directories out of range. What should I do if my superblock is corrupt? and got the error: dumpe2fs: Bad magic number in super-block while trying to open /dev/sda1. if so, there is ALWAYS a spare superblock at 16, so try fsck -F hfs -b 16 /dev/vg02/rlvol2. Restoring a Bad Superblock. 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 . fsck.ext2: Bad magic number in super-block while trying to open /dev/sda1 The superblock could not be read or does not describe a correct ext2 filesystem. # umount mount-point. What is "Bad magic number in superblock"? The superblock could not be read or does not describe a correct ext2 filesystem. if so, there is ALWAYS a spare superblock at 16, so try fsck -F hfs -b 16 /dev/vg02/rlvol2. 807559 Member Posts: 50,786. Hi, I've umounted a SunBlade 100 ide ATA II disk , and put into a linux box who can only read ufs. Modified 5 months ago. My mistake, focusing on the wrong detail. Look for Alternate Superblocks with mkfs Then I noticed I didn't use -y use -y and it fails with Fsck was running in yes mode. It has a bad primary superblock - bad magic number and is not able to find a secondary superblock to use. Running a standard fsck results in the abo. secondly are you sure it is HFS? What is Bad magic number? How do I check if a block is bad in Linux?

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