Next mount attempt, output changed back to what it was from my user. 32. Do not use the example. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock Aug 10, 2020 · So I'd just like to point out that the output by xfs_repair is what you get when running it on a full zero device that isn't and never has been XFS. Then you should immediately create a copy of your failing hard drive using ddrescue onto the new one Unable to mount, no superblock. ext4 -n /dev/sda. Using the default mkfs. I took the block count from the superblock, (right at 1TB per AG) and copied that block of data to the array, properly aligned. xfs(8). Be aware that this may result in further corruption or data loss. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock 15. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock However, it won't mount /dev/md0 and tells me: mount: /dev/md0: can't read superblock. An XFS filesystem has up to three parts: a data section, a log section, and a realtime section. Oct 14, 2019 · Stop. 发现super-block块损坏，询问是否修复，一路yes下来，修复完成。. 0) and Subscribed to SAP HANA. growpart is used to expand the sda1 partition to the whole sda disk. - SSH'ed with putty and run xfs_repair /dev/md3. Unable to mount, no superblock. The file system shuts down or changes to read-only due to inconsistencies. You will also want to pick one from the list you get from your partition. To clear the log, mount and unmount the XFS file system. img # losetup --find --show foobar. Primary superblock at 0, Group descriptors at 1-29. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock It is the first disk block in the allocation group. Now see what volumes are active with another Unable to mount, no superblock. If you are unable to mount the filesystem, then use. Boot from the network or local Solaris DVD, and attempt the following steps. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock The xfs_repair utility cannot repair an XFS file system with a dirty log. However, it won't mount /dev/md0 and tells me: mount: /dev/md0: can't read superblock. Now I'm starting to worry. The superblock keeps the filesystem metadata, and multiple copies are saved by filesystem to restore in case primary copy gets corrupted. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock Sep 9, 2015 · We have a Dell PowerEdge 420 with a 716iS iSCSI raid. Oct 13, 2020 · Please, edit your question and add new information to it, comments aren't really readable (and are not meant to stay). com May 21, 2018 · XFS is a modern journaled file system which uses extent-based file allocation and B+Tree style directories. 2. Then do this to format (if from last step you learned that your drive had file system and isn't an empty drive. 16 kernel or better. ext2: Bad magic number in super-block while trying to open /dev/nvme0n2 The first sector contains the superblock. Because the EBS snapshot/restore process is a block-level copy, any volumes you create from a snapshot will have the same UUID as the source volume so you can only mount one at a time. Also I am following the tut. Sep 9, 2015 · We have a Dell PowerEdge 420 with a 716iS iSCSI raid. XFS supports arbitrary extended file attributes. You can optionally create an XFS filesystem with a log size of less than 10 MB. Here, extsize is the size of an extent on the realtime device. But the repair wont go thru phase 1. Dec 6, 2010 · You can use any one of the following command to find out the superblock location: [a] mke2fs – Create an ext2/ext3/ext4 filesystem. 6 (and older) and RHEL 7 with the following messages: Raw. 7. sudo xfs_check /dev/hda3. To check the type, use blkid. Phase 1 - find and verify superblock The first sector contains the superblock. . It has to be a multiple of filesystem block size, which itself is generally set to 4096 bytes. # mkfs. *Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208* Pick an alternate superblock - keep in mind that the first one is the default and its bad so let's not use that one. sudo mount /dev/nvme1n1 /data. If these steps fail, recreate the root ( /) file system by using the newfs command and restore it from a backup copy. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock You're working on an XFS filesystem, in this case you need to use xfs_growfs instead of resize2fs. Version 5 superblock requires a 3. Jan 26, 2021 · c) mkfs. We needed SAP HANA subscription, since we are using this RHEL Image for SAP HANA Installation. xfs_repair: libxfs_device_zero write failed: Input/output error 只破坏super block（super block用于描述文件系统信息）. The first sector contains the superblock. For allocation groups after the first, the superblock is just a copy and is not updated after mkfs. xfs_check: read failed: Invalid argument cache_node_purge: refcount was 1, not zero (node=0x21ecef0) xfs_check: cannot read root inode (22) The first sector contains the superblock. 0 and later: Oracle Linux: xfs_repair Fails with "couldn't verify primary superblock - not enough secondary superblocks with matchi Oracle Linux: xfs_repair Fails with "couldn't verify primary superblock - not enough secondary superblocks with matching geometry" Jan 26, 2022 · This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock Dec 14, 2023 · The terminology, actual minimum, is used as XFS_MIN_LOG_BYTES and is 10 MB. But then I get this error: fsck from util-linux 2. You can also find the superblock with. . An XFS filesystem can reside on a regular disk partition or on a logical volume. For allo‐ cation groups after the first, the superblock is just a copy and is not updated after mkfs. XFS (sdb): Filesystem can only be safely mounted read only. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock However, it won't mount /dev/md0 and tells me: mount: /dev/md0: can't read superblock. a hard drive to save your valuable data on. Two commands are needed to perform this task : # growpart /dev/sda 1. The following points factor in these calculations: Jul 18, 2017 · sudo file -s /dev/nvme1n1. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock Jul 6, 2020 · and I see this error: can't read superblock. a hard drive equal to or larger than the hard drive you're recovering from. Well, great. Also, modifying LVM and file system metadata (as vgck possibly did and mke2fs surely does) makes recovering your files harder and harder. be replayed. 4 of xfsprogs) recently defaulted to version 5 superblock, with lots of new enhancements like metadata CRC checksums. xfs (8) options, the realtime section is absent, and the log area is contained within the data section. Version-Release number of selected component (if applicable May 21, 2018 · XFS is a modern journaled file system which uses extent-based file allocation and B+Tree style directories. The final thing you should check is the file system location. xfs_repair didn’t found any relevant piece of a superblock. xfs -f -r rtdev=/dev/sdb1,extsize=4096 /dev/sda1. mkfs. mount: mount /dev/sdb4 on /media/momedia failed: Structure needs cleaning. The new virtual hard drive is displayed as /dev/vdc, I created a new partition: fdisk /dev/vdc n p default +20G w Then I use mkfs to change the partition into XFS: mkfs. The network connect dropped in the middle of disk usage and we are no longer able to mount. Mar 31, 2018 · When you have hard drive errors, it's always better to have the following: a bootable USB running the same OS you're running. xfs (starting with version 3. xfs -i size=1024 /dev/vdc1 May 21, 2018 · XFS is a modern journaled file system which uses extent-based file allocation and B+Tree style directories. vgscan -v --mknodes. The filesystem sections are divided Sep 9, 2015 · We have a Dell PowerEdge 420 with a 716iS iSCSI raid. And I have to add a new XFS file system on a new virtual hard drive. 无法挂载。. Scenarios that require a file system check. This is to maintain compatibility with the IRIX on-disk format, and will not be changed. 0. (pick ext4/ext2 if your system is ext4/ext2; REPLACE sda with your disk). e2fsck is only for filesystem types ext2, ext3 and ext4. Mounting XFS filesystem created on RHEL 9 fails on RHEL 8. # truncate -s 40M foobar. Description of problem: Mounting XFS partition formatted on RHEL9 fails, it is not even possible mount in read-only mode (regression when comparing RHEL7-RHEL8 case). Realise that the backup of /home, and some critical data, are on that now-unreadable partition; obtain a USB disk and make an image on there; Current Situation. So, how can I (if possible) disable those newer features so I can boot the older kernel? Thanks. This seems to have worked rather well! xfs_db now has much fewer errors, and can read SBs and AGFs, and xfs_repair can do something with it. A file on the file system is inaccessible. Feb 2, 2022 · The names of the logical volumes suggest that the LVs are being used as virtual disks for the VMs, so each LV may contain a partition table and one or more partitions - and your parted output proves that's exactly what is happening. vol Phase 1 - find and verify superblock Phase 2 - using internal log - zero log ALERT: The filesystem has valuable metadata changes in a log which is being destroyed because the -L option was used. I have tried partition numbers 1-4 and get the same result. the -L option to destroy the log and attempt a repair. # xfs_growfs -d /dev/sda1. 1 e2fsck 1. - Start the array in maintenance mode. Note that destroying the log may cause corruption -- please attempt a mount. Because in my case I didn't need to recover the data on the /home logical volume (I appreciate this is an exception for most), I followed the instructions here and simply removed it using the lvremove command. 利用mke2fs这个 Sep 9, 2015 · We have a Dell PowerEdge 420 with a 716iS iSCSI raid. This issue is resolved. # xfs_repair -n /dev/sdb4. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock Jun 22, 2022 · # xfs_repair -L /dev/lvm02/backup. The next three sectors contain information for block and inode allocation within the allocation group. Thanks No, for root partition installations because the XFS superblock is written at block zero, where LILO would be installed. May 21, 2018 · XFS is a modern journaled file system which uses extent-based file allocation and B+Tree style directories. 91 and onward. Jun 11, 2021 · How to recover XFS file system with "superblock read failed" 3. 2- Trying to repair by xfs_repair: # xfs_repair /dev/sda4 ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. XFS (sdb): Superblock has unknown read-only compatible features (0xc) enabled. vol. find and create /dev/xxx/ Â nodes for the lvm. 45. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock When I attempt to mount the file with /dev/sdb3' it gives me mount: special device /dev/sdb3 does not exist. 6 (20-Mar-2020) fsck. 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. [b] dumpe2fs – dump ext2/ext3/ext4 filesystem information. XFS (sda1): Superblock has unknown read-only compatible features (0x4) enabled. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock The first sector contains the superblock. Q: Does GRUB work with XFS? There is native XFS filesystem support for GRUB starting with version 0. Dec 6, 2021 · tune2fs is for ext file systems, and if this filesystem is healthy, then this filesystem cannot be an ext type filesystem (or it would have a super-block). 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. Jun 22, 2022 · If you are unable to mount the filesystem, then use. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock If the superblock in the root ( /) file system becomes damaged and you cannot restore it, you have two choices: Reinstall the system. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock Explore the world of writing and freely express yourself on Zhihu's column platform, where ideas and creativity flourish. ext4 /dev/sda1. It’s a production machine, uptime 600 days, and i never used it before. Phase 1 - find and verify superblock Unable to mount, no superblock. 注：本例文件格式为ext4，如果文件格式为xfs，使用e2fsck -b block_number device修复即可。. Dec 29, 2022 · kernel: XFS (nvme0n2): Invalid superblock magic number. Then create a folder in current directory and mount the nvme drive: sudo mkdir /data. My partitions are: DellUtility (OK) Can't mount a XFS filesystem created in RHEL8 on RHEL7 When trying to mount a XFS filesystem that was created in RHEL 8 on RHEL 7, I get this error: mount: wrong fs type, bad option, bad superblock The first sector contains the superblock. SmallLoanOF1M, thanks for the suggestion. Feb 2, 2016 · The system is Ubuntu, a KVM virtual machine under CentOS (host). XFS (sdb): Attempted to mount read-only compatible filesystem read-write. Sep 23, 2016 · start with. of the filesystem before doing this. I also tried replacing the superblock using the backup superblocks with the command sudo fsck -b 32768 /dev/nvme0n2. 2. Inodes are dynamically allocated. For example, to reformat a file system to ext4, you would use the following command: $ mkfs. To view the available backup superblocks, we can use dumpe2fs command like below. for the GNU Parted that you linked to and I ran dd if=/dev/sdb of=/dev/sdc bs=512 conv=noerror,sync` to create a disk image of the hard drive but it is taking an unusually log t /dev/md1. Jan 10, 2019 · Every XFS filesystem has a (supposedly) unique ID stored on-disk, which protects you from accidentally mounting the same filesystem multiple times. Jan 3, 2018 · Here we will check how to identify the backup superblock locations on the Linux filesystem. skip this and go to next step): sudo mkfs -t xfs /dev/nvme1n1. Tried a restore (2 days needed), nothing better. Dec 11, 2022 · When rebooting I was left with unbootable ext4 partition and unmountable (mount: wrong fs type, bad option, bad superblock on /dev/nvme0n1p6) one. Resize XFS on CentOS after expand Raid. Partition cannot be mounted on Android but will mount RW w/ su on Linux Live. xfs_growfs is used to resize and apply the changes. Aug 29, 2016 · Same superblock issue. ERROR: The filesystem has valuable metadata changes in a log which needs to. Delete "home-new". xfs_check gives this. Using USBDrive, re-re-create home partition in a different disk location; this appears stable. Backup superblock at 32768, Group descriptors at 32769-32797. When checking that partition or disk ( fsck /dev/nvme0n1p6 or fsck /dev/nvme0n1 ) it reported the " Bad magic number in super-block " message - the same as in original post's question. Should the primary be too corrupted to be useful in locating the secondary superblocks, the program scans the filesystem until it finds and validates some secondary superblocks. wait4(-1, xfs_check: /dev/sdd is not a valid XFS filesystem (unexpected SB magic number 0x00000000) xfs_check: WARNING - filesystem uses v1 dirs,limited functionality provided. 数据没有丢失。. See full list on serverfault. = sectsz=4096 attr=2, projid32bit=1. This can be used to determine the location of the The superblock records various information about the enclosing filesystem, such as block counts, inode counts, supported features, maintenance information, and more. The log section can be either separate from the data section or contained within it. # xfs_repair -L /dev/lvm02/backup. 3. It cannot fix filesystem type ufs at all, and may in fact cause more damage to an UFS filesystem if you force it to attempt repairs anyway. Mount the filesystem to replay the log, and unmount it before. Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! attempting to find secondary superblock Jun 4, 2020 · If the device is valid and it really contains an ext2/ext3/ext4 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 PMBR partition table in /dev/sda If the file system format is incorrect, you can try to reformat the file system using the following command: $ mkfs. The relevant fsck tools can be used to check your system if any of the following occurs: System fails to boot. If the log is corrupt and cannot be replayed, use the -L option ("force log zeroing") to clear the log, that is, xfs_repair -L /dev/device. The xfs_log_calc_minimum_size() method returns the minimum possible log size based on superblock configuration. Now activate the volumes (it does not mount them) vgchange -a y. I guess this it happening because the fs is formatted using an updated mkfs which formats the device with features that are not supported by the older kernel. Feb 29, 2016 · So i did try to xfs_repair my md3 drive here's what i've done: - Do a full parity check (parity is valid) - Reboot is Safe mode. Check the file system location. The log section can be either separate The first sector contains the superblock. Phase 1 - find and verify superblock Phase 2 - using internal log. Issue. Cannot mount XFS - bad superblock. ext2 -n /dev/sda. Safe check finds the superblock. The XFS filesystem on those VM is a 1 TB one with 35M files and default settings (4KiB block, etc), here is the xfs_info output : meta-data=/dev/sdb isize=256 agcount=20, agsize=13107200 blks. Each allocation group contains several data structures. Mount the filesystem to replay the log, and unmount it before re-running xfs_repair. Dec 22, 2012 · mount: /dev/hda3: can't read superblock. I tried xfs_check /dev/sdf. May 9, 2018 · 2. 1. Only the first one (block 0 of the filesystem) is actually used; the other blocks are redundant information for xfs_repair(8) to use if the first superblock is damaged. 4 days ago · It thus seems that the mount/umount cycles are helping the corruption bug to appear. Mar 25, 2017 · AS I un-installed the current version of XFS package (version 4. xfs (8). Each file in the realtime section has an extent size that is a multiple of the realtime section extent size. So I try xfs_check and xfs_repair, the former of which tells me: xfs_check: /dev/md0 is invalid (cannot read first 512 bytes) and the latter: Phase 1 - find and verify superblock Mar 9, 2021 · Linux OS - Version Oracle Linux 7. # mount -t xfs /dev/sdb4 /media/momedia/. May 20, 2019 · EXT4 app2sd link2sd partition repair with bad superblock . re-running xfs_check. Files on a specific disk become corrupt. img /dev/loop0 # xfs_repair /dev/loop0 Phase 1 - find and verify superblock bad primary superblock - bad magic number !!! Unable to mount, no superblock. According to e2fsck, your /etc/fstab file, and your lsblk output, the filesystem type on /dev/sdb1 is ufs. SAP HANA subscription comes with Scalable File System Add-On (XFS) at no additional charge. The block size is 4K by default, but can be set to other values at file system creation time. mount成功。. Apr 2, 2024 · A filesystem with a realtime device is created by using the following command line, Copy code snippet. xfs_repair uses information in the primary superblock to automatically find and validate the primary superblock against the secondary superblocks before proceeding. ev jd wb vh mm kw iz sr sp al