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XFS, a journaling file system. It has a dummy fsck which does nothing [4] and an actual xfs_repair tool to be run when problems are suspected. UFS2 file system in FreeBSD, which can delay the check to background if soft updates are enabled. [5] As a result, it is usually not necessary to wait for fsck to finish before accessing the disk.
TestDisk is a free and open-source data recovery utility that helps users recover lost partitions or repair corrupted filesystems. [1] TestDisk can collect detailed information about a corrupted drive, which can then be sent to a technician for further analysis.
Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.
Ceph (pronounced / ˈ s ɛ f /) is a free and open-source software-defined storage platform that provides object storage, [7] block storage, and file storage built on a common distributed cluster foundation.
SystemRescue (Previously known as "SystemRescueCD") [4] is a Linux distribution for x86-64 and IA-32 computers. [5] The primary purpose of SystemRescue is to repair unbootable or otherwise damaged computer systems after a system crash. SystemRescue is not intended to be used as a permanent operating system.
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This means the data is still present on the filesystem, but only until some or all of it is overwritten by new file data. To recover these "lost" files, PhotoRec first tries to find the data block (or cluster) size. If the filesystem is not corrupted, this value can be read from the superblock (ext2/ext3/ext4) or volume boot record (FAT, NTFS).
badblocks is a Linux utility to check for bad sectors on a disk drive. It can create a text file with a list of these sectors that can be used with other programs, like mkfs, so that they are not used in the future and thus do not cause data corruption. It is part of the e2fsprogs project, [1] and a port is available for BSD operating systems. [2]