Ufs2 superblock structure. - dcruzeneil/rename-command WinHex / X-Ways Forensics templates Aug 21, 2024 · The output above from the dumpe2fs command provides information about the locations of the primary and backup superblocks in the ext4 filesystem on /dev/xvdb1. The newfs -Nv command can be invoked to nondestructively discover the superblock locations for the filesystem. It was working perfectly, but after an electric black out, im not able to mount or fsck the external drive anymore. When it came back up, the automatic file system check indicates: UFS2 superblock failed: fs->fs_maxbsize (0) < fs->fs_bsize (16384) I tried running fsck in single user mode: root@:/ # fsck -f /dev/nvd0p6 ** /dev/nvd0p6 ** Last Mounted on / ** Root file system ** Phase 1 - Check Blocks and Sizes ** Phase 2 Dec 6, 2010 · I think my file system has been damaged. There will be a copy of it in // every cylinder group of the drive. In addition to files and directories a JFS2 file system contains a superblock, allocation maps and one or more allocation groups. freebsd-version 11. com> wrote: > >> I did a: >> >> # dd if=FreeBSD May 24, 2024 · The superblock stores the overall filesystem layout in the disk. >> UFS2 superblock failed: fs->fs_csaddr (806456) != cgdmin (fs, 0) (5056) >> UFS2 superblock failed: fs->fs_csaddr (806456) != cgdmin (fs, 0) (5056) >> UFS2 superblock failed: fs->fs_csaddr (806456) != cgdmin (fs, 0) (5056) >> UFS2 superblock failed: fs->fs_csaddr (806456) != cgdmin (fs, 0) (5056 Use Cases and Ideas Here are some use cases and ideas where the information about bad magic number in the super-block can be helpful: Resolving file system errors during system startup Recovering data from a corrupted file system Performing file system maintenance and diagnostics Automating file system checks and repairs using scripts Script for Automation Here’s an example of a script that Mar 13, 2019 · Previous message (by thread): ZFS memory use (arc limit) Next message (by thread): [Bug 236504] [gmirror] [UFS2] "Superblock check-hash failed" messages seen Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] More information about the freebsd-fs mailing list Dec 27, 2017 · Hi all, I have a USB2, external hard drive, formatted under UFS. I have: A 1TB 2,5" HDD that ist formatted on a Panasonic Plasma. The latest UFS interface protocols are optimized for efficient throughput, system performance and reliability. # newfs -N /dev/rdsk/device-name # newfs -N /dev/rdsk/device-name The template "UFS2 Superblock BE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. However, if you have 1. Super Block ¶ The superblock records various information about the enclosing filesystem, such as block counts, inode counts, supported features, maintenance information, and more. 7. ) in the inode structure, and lower layers that provide data containers WinHex / X-Ways Forensics templates Apr 16, 2024 · The structure of the UFS file system is detailed in the next paragraph of this article. 0 to 2. 1. 00/1. XFS SuperBlock starts at ondisk offset 0, the definition of SuperBlock is in xfs. 00, addr 25> on usbus1 umass0: SCSI over Bulk-Only; quirks = 0x0100 umass0:6:0 WinHex / X-Ways Forensics templates Tools to manually edit the GameOS partition's UFS2 superblock to reduce the minimum free space - einsteinx2/PS3-Reclaim-HDD-Space I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot) From: Mark Millard <marklmi_at_yahoo. truenas. Just rebooted to load Windows and then back to Become superuser. Check for only non-critical errors in standard superblock UFS2 superblock failed: fs->fs_fsbtodb (0) != ILOG2 (fs->fs_fsize / sectorsize) (3) Failed, superblock has critical errors SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. 0-CURRENT-arm64-aarch64-RPI-20220701-9aa02d5120a-256480. struct ext4_super_block is the on-disk structure of the Superblock. org Cc: Subject: Re: kern/21083: lost SUPERBLOCK wrt UFS2 + Apple UFS Date: Mon, 5 May 2003 18:09:33 +1000 This now fscks with today's source. rG0eabe33087d8: Updates to UFS/FFS superblock integrity checks when reading a superblock. Primary Superblock: Located at block Feb 8, 2024 · The Unix file system (UFS) is a family of file systems supported by many Unix and Unix-like operating systems. Overall, the superblock's primary role is to manage metadata, ensuring the filesystem functions correctly and optimally while representing its defining characteristics. Mar 17, 2025 · dark. com for thread: "Help retrieving data from UFS disk (bad superblock)" Unfortunately, no related topics are found on the New Community Forums. WinHex / X-Ways Forensics templates While external drives used with the PS3 are all FAT32 formatted (or NTFS if you have CFW), the GameOS partition on the internal hard drive is formatted using the UFS2 filesystem with a layer of encryption on top. Bug 236504 - [gmirror] [UFS2] "Superblock check-hash failed" messages seen Summary: [gmirror] [UFS2] "Superblock check-hash failed" messages seen Status: Closed FIXED Alias: None Product: Base System Classification: Unclassified Component: kern (show other bugs) Version: CURRENT Hardware: Any Any I mportance: --- Affects Only Me Assignee Re: I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot) From: Mark Millard <marklmi_at_yahoo. In all cases the size of the superblock will be SBLOCKSIZE (8K). The work on UFS continued and, eventually, it became the primary format for machines running BSD and other derivates of Unix. Aug 31, 2023 · UFS2 superblock failed errors at bootHello, I had this same problem recently and solved it by replacing the mSATA SSD. 5: <OWC Envoy Pro mini> at usbus1 umass0 on uhub4 umass0: <OWC Envoy Pro mini, class 0/0, rev 3. description "Raw content of the UFS2 superblock (big-endian)" big-endian sector-aligned applies_to disk requires 0x55c "19 Oct 20, 2025 · The superblock contains only metainformation and is used to write and read metadata from the disk (inodes, directory entries). So, the UFS2 filesystem has reserved a flag in the superblock to indicate that it is a filesystem with 64-bit inode num-bers. template "UFS2 Superblock BE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. In 4. So the correct thing to do is just reject it silently rather than reporting why it was rejected. description "Raw content of the UFS2 superblock (little-endian)" May 30, 2023 · Superblock On an ext4 filesystem, the first block contains the Superblock. description "Raw content of the UFS2 superblock (little-endian)" With removablemedia, it could start in the first sector. The size of struct ext4_super_block is 1024 Bytes. description "Raw content of the UFS2 superblock (big-endian)" big-endian sector-aligned applies_to disk requires 0x55c "19 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. From the look of your SSD brand and model, I suspect you have a QOTOM device? Hoodisk SSD SBFM61. If the sparse_super feature flag is set, redundant copies of the superblock and group descriptors are kept only in the groups whose group number is either 0 or a power of 3, 5, or 7. The general concepts and analysis techniques for UFS were discussed in the previous chapter, and this chapter shows the layout of the data structures and where they are located in an example file system image. I've used mke2fs to find the alternate superblocks. However, the limit will be reached before the 64-bit block limit of UFS2 is reached. com> Date: Wed, 06 Jul 2022 01:24:12 UTC template "UFS2 Superblock BE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. In computer file systems, a superblock is a critical metadata structure that contains information about the file system's layout, size, and status. 2 BSD UNIX distribution. The superblock holds metadata about the filesystem, like which inode is the top-level directory and the type of filesystem used. The TV does the following with the disk: gpart show (under freebsd 9. Instead of block 1, I want to use block n as superblock. Each of the superblock replicas is offset by a different amount from the beginning of its cylinder group. 6 fsck A superblock is a data structure that contains all the information about the Linux file system. description "Raw content of the UFS2 superblock (little-endian)" Only the UFS2 filesystem has support for storing information needed to find alternate superblocks. XFS Volume contains SuperBlock, file system device and essential functions like Identify (), mount () etc… Identify () function reads SuperBlock from disk and verifies it. netbsd. 0 64 bit) => 34 1953525101 da1 GPT (931G) 34 54 Mar 6, 2010 · 3. Dec 31, 2012 · hi , afaik ufs2 is the "home" filesystem of the freebsd OS. com> Date: Wed, 06 Jul 2022 01:24:12 UTC On 2022-Jul-5, at 18:19, Mark Millard <marklmi@yahoo. A Volume is an instance of file system and defined in Volume. 2-RELEASE in a multiboot configuration. When the time comes to begin using 64-bit inode numbers, the flag can be turned on and the new directory format can be used. My Material for the HITB presentation. tpl","contentType":"file"},{"name Oct 11, 2014 · The TrueNAS Community has now been moved. All values are * given in byte-offset form, so they do not imply a sector size. Jun 25, 2025 · Alternative superblock locations were created by newfs (1M) at the time that the filesystem was created. 0. For UFS2 it got moved to 64K from the front to leave room for the disk label and a bigger bootstrap, and for really piggy systems we check at 256K from the front if the first three fail. Because the superblock contains critical data, multiple superblocks are made when the file system is created. They cannot mount the root ufs anymore: UFS2 superblock failed: CGS Jul 6, 2022 · At least there is now a known, specific way to produce the problem I tried different, smaller media: usb_msc_auto_quirk: UQ_MSC_NO_GETMAXLUN set for USB mass storage device OWC Envoy Pro mini (0x1e91:0xa2a5) ugen1. Implementing a C program that uses the structures used to represent a file in UFS2 (Unix File System) - superblock, inode structs, and direct structs - to rename a file. Dec 11, 2023 · Finding an alternate superblock failed. The superblock is located at the beginning of the disk slice, and is replicated in each cylinder group. May 26, 2024 · filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> or e2fsck -b 32768 <device> Found a gpt partition table in /dev/sdb fsck. description "Raw content of the UFS2 superblock (big-endian)" big-endian sector-aligned applies_to disk requires 0x55c "19 Dec 12, 2022 · MFC after: 2 weeks The following kernel output is seen when endian mismatch is detected: Trying to mount root from ufs:/dev/vtbd0s3 [] UFS2 superblock failed: possible endian mismatch between machine and filesystem Attempted recovery for standard superblock: failed Attempted extraction of recovery data from standard superblock: failed Attempt to find boot zone recovery data. On a disk based filesystem those permissions are written to the filesystem, on a tmpfs (5) filesystem too, but its contents will be entirely empty again when you first mount it, thus it will not 'remember' those permissions. A UFS1 superblock is typically located 8 KB from thestart of the file system, and a UFS2 superblock is typically located 64 KB from the start. Each filesystem would need to instantiate an object of this structure to fill in its superblock details during mount. h file. 1-RELEASE-p6 dmesg | grep ^da da0 at umass-sim0 bus 0 scbus6 target 0 lun 0 da0: Fixed The program uses UFS2 (Unix File System) structures, including the superblock, inode structures, and direct structures, to read a raw disk image and hierarchically list all the files and folders within it. It is a distant descendant of the original filesystem used by Version 7 Unix. device information as below (dual efi boot) Only the UFS2 filesystem has support for storing information needed to find alternate superblocks. Before today I haven't changed any settings or made any heavy disk writing operations. But if you mount a tmpfs (5) on /tmp you do need to take care of the correct permissions. FreeBSD also uses the Z File System (ZFS), known for its advanced features, robustness, and reliability. UFS1 and UFS2 file system structure The structure of the UFS1 and UFS2 file systems is as follows: the boot block is located first, and then the superblock. Jun 23, 2022 · To locate the next superblock you can use newfs with "-N" so it will only print the list of the superblocks which are going to be created without actually formatting the partition. It holds block size, block count, group size, and inode count among other disk layout parameters as described in the superblock data structure. The file systems maintain information and identify where the data is located on the disk for a file or directory. Each file system occupies one logical volume. How do I find out an alternative superblock location under Linux? Each file system has a superblock, which contains information about file system such as file system type, size, status, information about other metadata structures and so on. initr0 Thread Mar 17, 2025 fsck superblock ufs Replies: 12 Forum: Storage Tags Mar 17, 2025 · The sticky (7) bit has nothing to do with being a memory or disk based filesystem. This is harmless. The SSD is dying, I suggest backing up your config, replacing the SSD, and restoring the config. rG52f9710412ee: Correct several bugs in fsck_ffs (8) triggered by corrupted filesystems. The drive has a zfs_member on it named "james". 6. Each cylinder group has the following components: a backup copy of the superblock a cylinder group header, with statistics, free lists, etc, about this cylinder group, similar to those in the superblock a number of inodes, each containing file attributes a number of data blocks Inodes are numbered sequentially. The superblock records various information about the enclosing filesystem, such as block counts, inode counts, supported features, maintenance information, and more. In * all cases the size of the superblock will be SBLOCKSIZE. Study with Quizlet and memorize flashcards containing terms like cylinder groups, superblock, the beginning, yes and more. This chapter describes the data structures that make up a UFS1 or UFS2 file system. How can I fix this disk so that I can store new files on it? The superblock is a unique data structure in a filesystem (though multiple copies exist to guard against corruption). It defines the type, status, block size, location of inode tables, and other metadata-related information. superblock (and implicitly the struct super_block structure) will contain information about the block device used, the list of inodes, a pointer to the inode of the file system root directory, and a pointer to the template "UFS2 Superblock LE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. com> Date: Tue, 05 Jul 2022 22:59:52 UTC I did a: # dd if=FreeBSD-14. panic: ffs_use Reply: Mark Millard : "Re: I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot)" In reply to: Mark Millard : "I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot)" Go to: [ bottom of page ] [ top of archives Reply: Mark Millard : "Re: I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot)" In reply to: Mark Millard : "I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot)" Go to: [ bottom of page ] [ top of archives Each item in this structure is a pointer to a function that operates on a superblock object. FreeBSD has traditionally used the Unix File System (UFS), with the modernized UFS2 as its primary native file system. Universal Flash Storage (UFS) is an advanced, high performance interface designed for computing and mobile systems such as smartphones and tablets where power consumption needs to be minimal. If you omit the -N option, you will create a new, empty file system. # umount mount-point # umountmount-point Caution - Be sure to use the newfs -N in the next step. The superblock operations perform low-level operations on the filesystem and its inodes. Nov 14, 2024 · UFS/UFS2 UFS (UNIX File System) stems from the Berkeley Fast File System (FFS), which was developed by the Computer Science Research Group (CSRG) from the University of California, Berkeley and released in 1983 along with the 4. No additional kernel options are needed for UFS2 support, it's contained within the FFS code. See The Z File System (ZFS) for more details. template "UFS2 Superblock LE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. Global Structures ¶ The filesystem is sharded into a number of block groups, each of which have static metadata at fixed locations. img of=/dev/da0 bs=1m conv=sync status=progress 3113222144 bytes (3113 MB, 2969 MiB Sep 1, 2019 · It is an out-of-date superblock from a filesystem that did not do superblock check hashes (while the current one does do check-hashes). This is to reduce fragmentation and also From: Charlie Allom <charlie@rubberduck. This forum will now become READ-ONLY for historical purposes. In the first block of the filesystem, the first 1024 bytes are left for the installation of boot sectors and other oddities. Contribute to 0xricksanchez/HITB2020_FSFUZZER development by creating an account on GitHub. Change to a directory outside the damaged file system. Mar 15, 2025 · ufs Solved UFS2 superblock failed Good day to everyone! Today after rebooting I've got such error I have SATA drive ~10y old, dual boot with Windows (currenty I write from Windows). 3 is a common SSD in these devices. I've no clue about the implications. Like other *nix file systems such as Ext2/3/4, UFS2 can reserve part of the drive's space to only be used by the system or the root user. I had to hard reset my box. I am running 13. . If the flag is not set template "UFS2 Superblock BE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. So, the UFS2 filesystem has reserved a flag in the superblock to indicate that it is a filesystem with 64-bit inode numbers. com> wrote: > On 2022-Jul-5, at 15:59, Mark Millard <marklmi@yahoo. Extracting Disk Information {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"$I File Structure. Add support for UFS/UFS2 Fillesystem #717 Open shiren00 opened this issue 2 days ago · 0 comments shiren00 commented 2 days ago • Oct 27, 2025 · Different operating systems use different file systems natively. It is used by the operating system to understand and manage the file system stored on a storage device. Related topics on forums. The index descriptor table (inode table) is placed next, followed by the catalogs. Mar 28, 2020 · mount: /mnt/solaris: wrong fs type, bad option, bad superblock on /dev/sda6, missing codepage or helper program, or other error. rG4660b60a00c3: Updates to UFS/FFS superblock integrity checks when reading a superblock. tpl","path":"$I File Structure. description "Raw content of the UFS2 superblock (big-endian)" big-endian sector-aligned applies_to disk requires 0x55c "19 NEWFS (8) System Manager's Manual NEWFS (8) NAME newfs -- construct a new UFS1/UFS2 file system SYNOPSIS newfs [-EJNUjlnt] [-L volname] [-O filesystem-type] [-S sector-size] [-T disktype] [-a maxcontig] [-b block-size] [-c blocks-per-cylinder-group] [-d max-extent-size] [-e maxbpg] [-f frag-size] [-g avgfilesize] [-h avgfpdir] [-i bytes] [-k held-for-metadata-blocks] [-m free-space] [-o Sep 10, 2015 · I've got a UFS drive that has a bad superblock. 3. template "UFS2 Superblock BE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. Please feel free to join us on the new TrueNAS Community Forums. Presently What is the Unix File System? The Unix file system is a family of file system s supported by many Unix and Unix-like operating systems. Mar 6, 2010 · 3. It isalso possible for the UFS2 superblock to exist at 256 KB from the start of the file system, butthis is not the default. Please note that older fsck binaries will complain a bit about filesystems if you boot a new kernel, because of some superblock changes. Apr 23, 2003 · If you want an UFS2 fileystem, specify "-O 2" as an option. newfs -N /dev/ada2p2 !!! don't miss the capital -N !!! When you get the list of the superblock you can try fsck_ffs -b 1280640 /dev/ada2p2 where the 1280640 is the next superblock backup You can also try fstyp /dev a collection of cylinder groups. In reply to: Mark Millard : "Re: I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin (fs, 0) (5048)" style failure via main 9aa02d5120a (June 30, via snapshot)" Go to: [ bottom of page ] [ top of archives ] [ this month ] From: Mark Millard <marklmi_at_yahoo. 4BSD and BSD Unix systems derived from it, such as FreeBSD, NetBSD, OpenBSD, and DragonFly BSD, the implementation of UFS1 and UFS2 is split into two layers: an upper layer that provides the directory structure and supports metadata (permissions, ownership, etc. ext4 produces similar output. Find the answers to all questions about recovering files with UFS Explorer Professional Recovery in a comprehensive user manual Jul 6, 2022 · [prev in list] [next in list] [prev in thread] [next in thread] List: freebsd-current Subject: Re: I replicated "UFS2 superblock failed: fs->fs_csaddr (805328) != cgdmin(fs, 0) (5048)" style fail From: Mark Millard <marklmi () yahoo ! com> Date: 2022-07-06 1:19:16 Message-ID: 562119CC-B142-493F-A7DF-F756A43F5358 () yahoo ! com [Download RAW message or body] On 2022-Jul-5, at 15:59, Mark For UFS2 it got moved to 64K from the front to leave * room for the disk label and a bigger bootstrap, and for really piggy * systems we check at 256K from the front if the first three fail. Unmount the file system. Jul 23, 2023 · Hello, I observed multiple systems not booting after system updates from 2. It starts at an offset of 1024 bytes from the disk’s beginning and spans 1024 bytes. Display the superblock values with the newfs -N command. com> To: gnats-bugs@gnats. 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 Feb 19, 2023 · Commits rGa0cd0329512f: Correct several bugs in fsck_ffs (8) triggered by corrupted filesystems. How can I mount the drive with the alternate supe Jan 15, 2025 · The superblock effectively maintains filesystem integrity and facilitates efficient data allocation, acting as the data structure holding all vital filesystem information. All values are given in byte-offset form, so they do not imply a sector size. Tools to manually edit the GameOS partition's UFS2 superblock to reduce the minimum free space - einsteinx2/PS3-Reclaim-HDD-Space template "UFS2 Superblock LE" // Created by Michele Larese on Dec 7, 2005 // X-Ways Software Technology AG // The first superblock always starts at position 65536, 131072 // or 262144 of an UFS partition. struct superblock VFS defines a generic layout for the superblock through this structure. p4nt8wcjv mwdy0l 5gb wyd2 hifed ebhk vjyar ypiz nswn akudp