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save critical ext2/ext3/ext4 filesystem metadata to a file e2label change the label on an ext2/ext3/ext4 filesystem e2scrub check a filesystem "online" (i.e. without having to unmount it) in the case where the filesystem is on an LVM LV e2undo replay an undo log for an ext2/ext3/ext4 filesystem e4defrag online defragmenter for ext4 filesystem ...
Bcachefs is a copy-on-write (COW) file system for Linux-based operating systems. Its primary developer, Kent Overstreet, first announced it in 2015, and it was added to the Linux kernel beginning with 6.7. [1] [2] It is intended to compete with the modern features of ZFS or Btrfs, and the speed and performance of ext4 or XFS.
The reason for some limits of ext2 are the file format of the data and the operating system's kernel. Mostly these factors will be determined once when the file system is built. They depend on the block size and the ratio of the number of blocks and inodes. [citation needed] In Linux the block size is limited by the architecture page size.
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.
JFS – Journaled File System – used by AIX, OS/2/eComStation/ArcaOS and Linux operating systems; ISO 9660 – Extent-based file system for optical disc media; MPE File System – the file system of the Multi-Programming Executive operating system. NTFS – used by Windows; OCFS2 – Oracle Cluster File System – a shared-disk file system ...
Also the minfree setting that allocates datablocks for the filesystem and the super user processes creates a discrepancy between total blocks and the sum of used and available blocks. The minfree setting is usually set to about 5% of the total filesystem size. For more info see core utils faq.
The structure allows for inodes to describe very large files in file systems with a fixed logical block size. Central to the mechanism is that blocks of addresses (also called indirect blocks) are only allocated as needed. For example, a 12-block file would be described using just the inode because its blocks fit into the number of direct ...
bcache (abbreviated from block cache) is a cache mechanism in the Linux kernel's block layer, which is used for accessing secondary storage devices. It allows one or more fast storage devices, such as flash-based solid-state drives (SSDs), to act as a cache for one or more slower storage devices, such as hard disk drives (HDDs); this ...