![]() Failure to do so may lead to filesystem corruption (due to bad disks, cables, memory, or kernel bugs) going It is strongly recommended that either -c (mount-count-dependent) or -i (time-dependent) checking be enabled to force periodic fullĮ2fsck(8) checking of the filesystem. A value of zero will disable the time-dependent checking. No suffix or d will interpret the number interval-between-checks as days, m as Is converted to a numerical gid before it is stored in the superblock.Īdjust the maximal time between two filesystem checks. The group parameter can be a numerical gid or a group name. g group Set the group which can use the reserved filesystem blocks. Severe data loss and filesystem corruption. WARNING: Removing an external journal from a filesystem which was not cleanly unmounted without first replaying the external journal can result in This option is useful when removing the has_journal filesystem feature from aįilesystem which has an external journal (or is corrupted such that it appears to have an external journal), but that external journal is not available. f Force the tune2fs operation to complete even in the face of errors. ^test_fs Clear the test_fs flag, indicating the filesystem should only be mounted using production-level filesystem code. Test_fs Set a flag in the filesystem superblock indicating that it may be mounted using experimental kernel code, such as the ext4dev filesystem. This superblock setting is only honored in 2.6.35+ kernels Īnd not at all by the ext2 and ext3 file system drivers. ![]() The bitmask-based default options, and then parse the mount_option_string, before parsing the mount options passed from the mount(8) #Journaly linux driver#The ext4 file system driver will first apply Specified with the -o option, mount_option_string is an arbitrary string with a maximum length of 63 bytes, which is stored in the superblock. Unlike the bitmask-based default mount options which can be ![]() Mount_opts= mount_option_string Set a set of default mount options which will be used when the file system is mounted. Valid algorithms accepted are: legacy, half_md4, and Hash_alg= hash-alg Set the default hash algorithm used for filesystems with hashed b-tree directories. This allows the block allocator to prevent read-modify-write of the parity in a RAID stripe if This is typically be stride-size * N, where N is the Stripe_width= stripe-width Configure the filesystem for a RAID array with stripe-width filesystem blocks per stripe. This mostly affects placement of filesystem metadata like bitmaps at mke2fs(2) time to avoid placing them on a single disk, which can This is the number of blocks read or written to disk before moving to Stride= stride-size Configure the filesystem for a RAID array with stride-size filesystem blocks. Extended options are comma separated, and may take an argument using the equals ('=') sign. E extended-options Set extended options for the filesystem. error-behavior can be one of the following: In all cases, a filesystem error will cause e2fsck(8) to check theįilesystem on the next boot. #Journaly linux code#e error-behavior Change the behavior of the kernel code when errors are detected. If set to a greater value than the max-mount-counts parameter set by the -c option,Į2fsck(8) will check the filesystem at the next reboot. C mount-count Set the number of times the filesystem has been mounted. See also the -i option for time-dependent checking. Too late to prevent data loss at that point. A filesystem error detected by the kernel will still force an fsck on the next reboot, but it may already be Marked dirty, so it will not normally be checked. ![]() If you are using journaling on your filesystem, your filesystem will never be Bad disk drives, cables, memory, and kernel bugs couldĪll corrupt a filesystem without marking the filesystem dirty or in error. You should strongly consider the consequences of disabling mount-count-dependent checking entirely. Staggering the mount-counts at which filesystems are forcibly checked will avoid all filesystems being checked at one time when using journaled filesystems. Times the filesystem is mounted will be disregarded by e2fsck(8) and the kernel. If max-mount-counts is 0 or -1, the number of Options -c max-mount-counts Adjust the number of mounts after which the filesystem will be checked by e2fsck(8). Program, or by using the dumpe2fs(8) program. The current values of these options can be displayed by using the -l option to tune2fs(8) On Linux ext2, ext3, or ext4 filesystems. feature ] deviceĭescription tune2fs allows the system administrator to adjust various tunable filesystem parameters Tune2fs mount-options ] [ -s sparse-super-flag ![]()
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