1. 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. Ask Question Asked 7 years, 6 months ago. failing that, I am not sure there is much more to do. 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 . What is super block concept? So, I'm a bit stuck. 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. 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. # newfs -N /dev/rdsk/ device-name. Viewed 452k times 200 82. yes search for alternate super-block failed. What does Super block signify? What is "Bad magic number in superblock"? Display the superblock values with the newfs -N command. I have added the multipath -l and /etc/multipath.conf to . you must use the-b option to fsck to specify the location of an alternate super-block to supply needed information; see fsck(8). 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. failing that, I am not sure there is much more to do. The magic number of the file system is stored in the Superblock. Sep 9, 2015 at 18:15. 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. /dev/vg02/rlvol2. If you wish to run in yes mode using the alternate superblock run . xfs_repair: bad primary superblock - bad magic number !!! Change to a directory outside the damaged file system. 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. It's really annoying that the leopard disk that I bought doesn't copy and doesn't install. - Jesse K. Sep 9, 2015 at 20:39. 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). How is the VFS superblock synchronized with the super block in the disk? I have added the multipath -l and /etc/multipath.conf to . 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. fsck is a wrapper that identifies the specific tool to use to analyze/repair a filesystem that . Subject: xfs_repair: bad primary superblock - bad magic number !!! Any idea where there might be another valid copy of the superblock? Technical Notes. bad magic number in superblock. if so, there is ALWAYS a spare superblock at 16, so try fsck -F hfs -b 16 /dev/vg02/rlvol2. Basically it give no information beyond that. Don't panic, this is what you have to do next to solve this issue: Go to your AWS dashboard, EC2 section. What is Bad magic number? Viewed 452k times 200 82. Then when i mounted a hd again in a SunBlade 100 i've found What is "Bad magic number in superblock"? - user1666203. share. and get Bad Superblock at block 16: Number of directories out of range. 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. Where are super blocks . Hi, I've umounted a SunBlade 100 ide ATA II disk , and put into a linux box who can only read ufs. If any defaults were overridden, the magic number should be 0x65872143. 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. Click on "Volumes" Find the broken volume. question: q: bad super block: magic number wrong look for alternate superblocks? Technical Notes. Modified 5 months ago. /dev/vg02/rlvol2. And whatever the problem actually is, /dev/sdc1 seems to have . - 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. Use. Can I recover a 500GB Seagate Momentus with bad sectors? 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. 3. Phase 1 - find and verify superblock. 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 hpserv220:/ # any suggestions how to resovle this? might be too old to make sense of it. 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 . The magic number of the file system is stored in the Superblock. What is the difference between fsck and e2fsck? It has a bad primary superblock - bad magic number and is not able to find a secondary superblock to use. 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 . - user1666203. Unmount the file system. Phase 1 - find and verify superblock. Bad superblock : magic number wrong ! resize2fs: Bad magic number in super-block while trying to open. Im running a multi drive enclosure via FW400 and one of the drives is a 750Gb partitioned into two partitions, roughly half and half. First make a copy of the image and work on that copy. The superblock could not be read or does not describe a correct ext2 filesystem. How fix super block bad magic number? The fact that you use fsck on the original image suggests that you have, at one point, formatted it as ext2/3/4. Click on "Volumes" Find the broken volume. Ask Question Asked 7 years, 6 months ago. firstly,ensure you are using the raw device, i.e. What is the difference between fsck and e2fsck? hpserv220:/ # any suggestions how to resovle this? if so, there is ALWAYS a spare superblock at 16, so try fsck -F hfs -b 16 /dev/vg02/rlvol2. It says it can't the superblock, when I make suggestions I get the above message 'Bad super block': magic number wrong'. What is "Bad magic number in superblock"? resize2fs: Bad magic number in super-block while trying to open. It has a bad primary superblock - bad magic number and is not able to find a secondary superblock to use. bad primary superblock - bad magic number !!! 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. My mistake, focusing on the wrong detail. 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. firstly,ensure you are using the raw device, i.e. Provide an alternative superblock with the fsck command. 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. 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?) Any idea where there might be another valid copy of the superblock? 807559 Member Posts: 50,786. Nov 2, 2001 12:30PM edited May 28, 2003 6:07AM in Installation. My mistake, focusing on the wrong detail. How to resolve bad magic number in super-block error? Hello list, I am running woody with 2.4.19 and xfs patch for 2.4.19 from SGI ftp site. bad primary superblock - bad magic number !!! Running a standard fsck results in the abo. attempting to find secondary superblock... and no good secondary superblock is found. The original superblock is gone, but there may be valid backups. 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 . fsck.ext4: Bad magic number in super-block while trying to open /dev/sdb1 and e2fsck reports a similar error: Very often, the bad information in the primary superblock might not have been propagated to the . 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. EXT4 app2sd link2sd partition repair with bad superblock . Don't panic, this is what you have to do next to solve this issue: Go to your AWS dashboard, EC2 section. The root filesystem on /dev/sda1 requires manual fsck. It says it can't the superblock, when I make suggestions I get the above message 'Bad super block': magic number wrong'. 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 . So, I'm a bit stuck. comment. thanks. In the preceding output, note the corrupted magic value at 0x1000 ( 1234 0234 ). 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. Re: fsck --> Bad Super Block: Magic Number Wrong. The superblock could not be read or does not describe a correct ext2 filesystem. Sep 9, 2015 at 18:15. Very often, the bad information in the primary superblock might not have been propagated to the . Then when i mounted a hd again in a SunBlade 100 i've found 1 Reply fsck is a wrapper that identifies the specific tool to use to analyze/repair a filesystem that . 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 . See above for edits. 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. What is Bad magic number? I booted the computer from USB in live mode and ran the following command: sudo dumpe2fs /dev/sda1. 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 then I get Bad SuperBlock at 20350880: Magic number wrong. attempting to find secondary superblock... and no good secondary superblock is found. Date: Tue, 24 Sep 2002 17:15:21 +0800. Become superuser. After adding adding the space, you need to resize the file system. 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 . Nov 2, 2001 12:30PM edited May 28, 2003 6:07AM in Installation. secondly are you sure it is HFS? 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 Is there a bad magic number in resize2fs? 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. # umount mount-point. 2. fsck reports an invalid superblock: $ sudo fsck.ext4 /dev/sdb1 e2fsck 1.42 (29-Nov-2011) fsck.ext4: Superblock invalid, trying backup blocks. 1. ext4 - Bad magic number in super-block. 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 . Re: fsck --> Bad Super Block: Magic Number Wrong. watch question. Modified 5 months ago. 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. If all defaults were taken when the file system was created, the magic number should be 0x43218765. How do I check if a block is bad in Linux? To: debian-user@lists.debian.org. From: Patrick Hsieh < pahud@ezplay.tv >. 807559 Member Posts: 50,786. See above for edits. Hi, I've umounted a SunBlade 100 ide ATA II disk , and put into a linux box who can only read ufs. 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. Basically it give no information beyond that. OK, it looks like /dev/sdb is in fact partitioned, and so /dev/sdb1 is the right device to use. asker certified solution . After extending a virtual drive on VMWare, I had to add the additional disk space to the logical volume. If anything goes wrong, you will still have the original image. Partition cannot be mounted on Android but will mount RW w/ su on Linux Live. Running a standard fsck results in the abo. 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. Used: $ fsck -b 32768 /dev/sda6 to fix. - Jesse K. Sep 9, 2015 at 20:39. Bad superblock : 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). 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I recover a 500GB Seagate Momentus with bad sectors raw device, i.e '' https: //allfamousbirthday.com/faqs/invalid-magic-number-in-superblock/ '' where.
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