Manual Fsck

Posted : admin On 18.08.2021

On the server side, Seafile stores the files in the libraries in an internal format. Seafile has its own representation of directories and files (similar to Git).

2 thoughts on “ VCSA 6.0 prompting for a manual fsck ” Mohammad A. Haque says: July 5, 2016 at 10:43 am. No need to chsh. Run /etc/init.d/boot.lvm to start. When the appliance restarts, the following message is displayed: root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. At this point, A root prompt is displayed requesting the root OS password (default is unitrends1 or the password set for ssh access) Next, type fsck followed by Enter. At each prompt thereafter, type y to continue the process. (Initramfs): /dev/sda1 contains a file system with errors, check forced. Inodes that were a part of a corrupted orphan linked lost found. /dev/sda1: UNEXPECTED INCONSISTENCY; RUN fsck manually.(I.e., without -a or -p options). Fsck exited with status code 4. The root filesystem on /dev/sda1 requires a manual fsck.

With default installation, these internal objects are stored in the server's file system directly (such as Ext4, NTFS). But most file systems don't assure the integrity of file contents after a hard shutdown or system crash. So if new Seafile internal objects are being written when the system crashes, they can be corrupt after the system reboots. This will make part of the corresponding library not accessible.

Note: If you store the seafile-data directory in a battery-backed NAS (like EMC or NetApp), or use S3 backend available in the Pro edition, the internal objects won't be corrupt.

'the root filesystem on /dev/sda1 requires a manual fsck'. Today, when I turned on the computer, I had this problem again. This is not the first time I had it, so I think I need to record it and maybe it can help me to learn more and more. FSCK.FAT(8) System Manager's Manual FSCK.FAT(8) NAME top fsck.fat - check and repair MS-DOS FAT filesystems SYNOPSIS top fsck.fat OPTIONS DEVICE DESCRIPTION top fsck.fat verifies the consistency of MS-DOS filesystems and optionally tries to repair them. The following filesystem problems can be corrected (in this order):. FAT contains.

We provide a seaf-fsck.sh script to check the integrity of libraries. The seaf-fsck tool accepts the following arguments:

Manual Fsck

There are three modes of operation for seaf-fsck:

  1. checking integrity of libraries.
  2. repairing corrupted libraries.
  3. exporting libraries.

Checking Integrity of Libraries¶

Running seaf-fsck.sh without any arguments will run a read-only integrity check for all libraries.

If you want to check integrity for specific libraries, just append the library id's as arguments:

The output looks like:

The corrupted files and directories are reported.

Sometimes you can see output like the following:

This means the 'head commit' (current state of the library) recorded in database is not consistent with the library data. In such case, fsck will try to find the last consistent state and check the integrity in that state.

Tips: If you have many libraries, it's helpful to save the fsck output into a log file for later analysis.

Repairing Corruption¶

Corruption repair in seaf-fsck basically works in two steps:

  1. If the library state (commit) recorded in database is not found in data directory, find the last available state from data directory.
  2. Check data integrity in that specific state. If files or directories are corrupted, set them to empty files or empty directories. The corrupted paths will be reported, so that the user can recover them from somewhere else.

Running the following command repairs all the libraries:

Most of time you run the read-only integrity check first, to find out which libraries are corrupted. And then you repair specific libraries with the following command:

After repairing, in the library history, seaf-fsck includes the list of files and folders that are corrupted. So it's much easier to located corrupted paths.

Best Practice for Repairing a Library¶

To check all libraries and find out which library is corrupted, the system admin can run seaf-fsck.sh without any argument and save the output to a log file. Search for keyword 'Fail' in the log file to locate corrupted libraries. You can run seaf-fsck to check all libraries when your Seafile server is running. It won't damage or change any files.

When the system admin find a library is corrupted, he/she should run seaf-fsck.sh with '--repair' for the library. After the command fixes the library, the admin should inform user to recover files from other places. There are two ways:

  • Upload corrupted files or folders via the web interface
  • If the library was synced to some desktop computer, and that computer has a correct version of the corrupted file, resyncing the library on that computer will upload the corrupted files to the server.

Speeding up FSCK by not checking file contents¶

Starting from Pro edition 7.1.5, an option is added to speed up FSCK. Most of the running time of seaf-fsck is spent on calculating hashes for file contents. This hash will be compared with block object ID. If they're not consistent, the block is detected as corrupted.

In many cases, the file contents won't be corrupted most of time. Some objects are just missing from the system. So it's enough to only check for object existence. This will greatly speed up the fsck process.

To skip checking file contents, add the '--shallow' or '-s' option to seaf-fsck.

Exporting Libraries to File System¶

You can use seaf-fsck to export all the files in libraries to external file system (such as Ext4). This procedure doesn't rely on the seafile database. As long as you have your seafile-data directory, you can always export your files from Seafile to external file system.

The command syntax is

The argument top_export_path is a directory to place the exported files. Each library will be exported as a sub-directory of the export path. If you don't specify library ids, all libraries will be exported.

Currently only un-encrypted libraries can be exported. Encrypted libraries will be skipped.

FSCK(8)System AdministrationFSCK(8)
fsck - check and repair a Linux filesystem

Requires A Manual Fsck

fsck [-lsAVRTMNP] [-r [fd]] [-C [fd]] [-tfstype] [filesystem..] [--] [fs-specific-options]
fsck is used to check and optionally repair one or more Linux filesystems. filesystem can be a device name (e.g., /dev/hdc1, /dev/sdb2), a mount point (e.g., /, /usr, /home), or an filesystem label or UUID specifier (e.g., UUID=8868abf6-88c5-4a83-98b8-bfc24057f7bd or LABEL=root). Normally, the fsck program will try to handle filesystems on different physical disk drives in parallel to reduce the total amount of time needed to check all of them.

If no filesystems are specified on the command line, and the -A option is not specified, fsck will default to checking filesystems in /etc/fstab serially. This is equivalent to the -As options.

The exit status returned by fsck is the sum of the following conditions:

0

1

Filesystem errors corrected

2

Peter the great pdf free download. 4

Filesystem errors left uncorrected

8

16

Usage or syntax error

32

128

Shared-library error

The exit status returned when multiple filesystems are checked is the bit-wise OR of the exit statuses for each filesystem that is checked.

In actuality, fsck is simply a front-end for the various filesystem checkers (fsck.fstype) available under Linux. The filesystem-specific checker is searched for in the PATH environment variable. If the PATH is undefined then fallback to /sbin.

Please see the filesystem-specific checker manual pages for further details.

-l
Create an exclusive flock(2) lock file (/run/fsck/<diskname>.lock) for whole-disk device. This option can be used with one device only (this means that -A and -l are mutually exclusive). This option is recommended when more fsck instances are executed in the same time. The option is ignored when used for multiple devices or for non-rotating disks. fsck does not lock underlying devices when executed to check stacked devices (e.g. MD or DM) - this feature is not implemented yet.

-r [fd]

Report certain statistics for each fsck when it completes. These statistics include the exit status, the maximum run set size (in kilobytes), the elapsed all-clock time and the user and system CPU time used by the fsck run. For example:

/dev/sda1: status 0, rss 92828, real 4.002804, user 2.677592, sys 0.86186

GUI front-ends may specify a file descriptor fd, in which case the progress bar information will be sent to that file descriptor in a machine parsable format. For example:

/dev/sda1 0 92828 4.002804 2.677592 0.86186

-s

Serialize fsck operations. This is a good idea if you are checking multiple filesystems and the checkers are in an interactive mode. (Note: e2fsck(8) runs in an interactive mode by default. To make e2fsck(8) run in a non-interactive mode, you must either specify the -p or -a option, if you wish for errors to be corrected automatically, or the -n option if you do not.)

-tfslist

Specifies the type(s) of filesystem to be checked. When the -A flag is specified, only filesystems that match fslist are checked. The fslist parameter is a comma-separated list of filesystems and options specifiers. All of the filesystems in this comma-separated list may be prefixed by a negation operator 'no' or '!', which requests that only those filesystems not listed in fslist will be checked. If none of the filesystems in fslist is prefixed by a negation operator, then only those listed filesystems will be checked.

Options specifiers may be included in the comma-separated fslist. They must have the format opts=fs-option. If an options specifier is present, then only filesystems which contain fs-option in their mount options field of /etc/fstab will be checked. If the options specifier is prefixed by a negation operator, then only those filesystems that do not have fs-option in their mount options field of /etc/fstab will be checked.

For example, if opts=ro appears in fslist, then only filesystems listed in /etc/fstab with the ro option will be checked.

For compatibility with Mandrake distributions whose boot scripts depend upon an unauthorized UI change to the fsck program, if a filesystem type of loop is found in fslist, it is treated as if opts=loop were specified as an argument to the -t option.

Normally, the filesystem type is deduced by searching for filesys in the /etc/fstab file and using the corresponding entry. If the type cannot be deduced, and there is only a single filesystem given as an argument to the -t option, fsck will use the specified filesystem type. If this type is not available, then the default filesystem type (currently ext2) is used.

-A

Walk through the /etc/fstab file and try to check all filesystems in one run. This option is typically used from the /etc/rc system initialization file, instead of multiple commands for checking a single filesystem.

The root filesystem will be checked first unless the -P option is specified (see below). After that, filesystems will be checked in the order specified by the fs_passno (the sixth) field in the /etc/fstab file. Filesystems with a fs_passno value of 0 are skipped and are not checked at all. Filesystems with a fs_passno value of greater than zero will be checked in order, with filesystems with the lowest fs_passno number being checked first. If there are multiple filesystems with the same pass number, fsck will attempt to check them in parallel, although it will avoid running multiple filesystem checks on the same physical disk.

fsck does not check stacked devices (RAIDs, dm-crypt, ..) in parallel with any other device. See below for FSCK_FORCE_ALL_PARALLEL setting. The /sys filesystem is used to determine dependencies between devices.

Hence, a very common configuration in /etc/fstab files is to set the root filesystem to have a fs_passno value of 1 and to set all other filesystems to have a fs_passno value of 2. This will allow fsck to automatically run filesystem checkers in parallel if it is advantageous to do so. System administrators might choose not to use this configuration if they need to avoid multiple filesystem checks running in parallel for some reason - for example, if the machine in question is short on memory so that excessive paging is a concern.

fsck normally does not check whether the device actually exists before calling a filesystem specific checker. Therefore non-existing devices may cause the system to enter filesystem repair mode during boot if the filesystem specific checker returns a fatal error. The /etc/fstab mount option nofail may be used to have fsck skip non-existing devices. fsck also skips non-existing devices that have the special filesystem type auto.

-C [fd]

Display completion/progress bars for those filesystem checkers (currently only for ext[234]) which support them. fsck will manage the filesystem checkers so that only one of them will display a progress bar at a time. GUI front-ends may specify a file descriptor fd, in which case the progress bar information will be sent to that file descriptor.

-M

Do not check mounted filesystems and return an exit status of 0 for mounted filesystems.

-N

-P

When the -A flag is set, check the root filesystem in parallel with the other filesystems. This is not the safest thing in the world to do, since if the root filesystem is in doubt things like the e2fsck(8) executable might be corrupted! This option is mainly provided for those sysadmins who don’t want to repartition the root filesystem to be small and compact (which is really the right solution).

-R

When checking all filesystems with the -A flag, skip the root filesystem. (This is useful in case the root filesystem has already been mounted read-write.)

-T

-V

Produce verbose output, including all filesystem-specific commands that are executed.

-?, --help

--version

Display version information and exit.
Options which are not understood by fsck are passed to the filesystem-specific checker!

These options must not take arguments, as there is no way for fsck to be able to properly guess which options take arguments and which don’t.

Options and arguments which follow the -- are treated as filesystem-specific options to be passed to the filesystem-specific checker.

Please note that fsck is not designed to pass arbitrarily complicated options to filesystem-specific checkers. If you’re doing something complicated, please just execute the filesystem-specific checker directly. If you pass fsck some horribly complicated options and arguments, and it doesn’t do what you expect, don’t bother reporting it as a bug. You’re almost certainly doing something that you shouldn’t be doing with fsck. Options to different filesystem-specific fsck’s are not standardized.

The fsck program’s behavior is affected by the following environment variables:

FSCK_FORCE_ALL_PARALLEL

If this environment variable is set, fsck will attempt to check all of the specified filesystems in parallel, regardless of whether the filesystems appear to be on the same device. (This is useful for RAID systems or high-end storage systems such as those sold by companies such as IBM or EMC.) Note that the fs_passno value is still used.

FSCK_MAX_INST

Manual Fsck
This environment variable will limit the maximum number of filesystem checkers that can be running at one time. This allows configurations which have a large number of disks to avoid fsck starting too many filesystem checkers at once, which might overload CPU and memory resources available on the system. If this value is zero, then an unlimited number of processes can be spawned. This is currently the default, but future versions of fsck may attempt to automatically determine how many filesystem checks can be run based on gathering accounting data from the operating system.

PATH

The PATH environment variable is used to find filesystem checkers.

FSTAB_FILE

This environment variable allows the system administrator to override the standard location of the /etc/fstab file. It is also useful for developers who are testing fsck.

LIBBLKID_DEBUG=all

The Root Filesystem On Requires A Manual Fsck

LIBMOUNT_DEBUG=all

enables libmount debug output.
/etc/fstab
Theodore Ts’o <[email protected]>>, Karel Zak <[email protected]>
fstab(5), mkfs(8), fsck.ext2(8) or fsck.ext3(8) or e2fsck(8), fsck.cramfs(8), fsck.jfs(8), fsck.nfs(8), fsck.minix(8), fsck.msdos(8), fsck.vfat(8), fsck.xfs(8), reiserfsck(8)
For bug reports, use the issue tracker at https://github.com/karelzak/util-linux/issues.

Manual Fsck Must Be Performed Ubuntu

The fsck command is part of the util-linux package which can be downloaded from Linux Kernel Archivehttps://www.kernel.org/pub/linux/utils/util-linux/.

Manual Fsck Linux

2021-07-20util-linux 2.37.1