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With implementations that are solely volume management, such as Core Storage and Linux LVM, separating and abstracting away volume management from the file system loses the ability to easily make storage decisions for particular files or directories. For example, if a certain directory (but not the entire file system) is to be permanently moved ...
The device mapper is a framework provided by the Linux kernel for mapping physical block devices onto higher-level virtual block devices.It forms the foundation of the logical volume manager (LVM), software RAIDs and dm-crypt disk encryption, and offers additional features such as file system snapshots.
On most LVM setups, only one copy of the LVM head is saved to each PV, which can make the volumes more susceptible to failed disk sectors. This behavior can be overridden using vgconvert --pvmetadatacopies. If the LVM can not read a proper header using the first copy, it will check the end of the volume for a backup header.
Yes (since 5.4, [71] available as a kernel module or FUSE driver for earlier versions) Yes No Yes No Yes (available as a FUSE driver) No No No Yes (available as a FUSE driver) No With kernel 5.10 FAT12: Yes Yes Yes Yes Yes Yes Yes Yes Yes Partial (via dosdir, dosread, doswrite) Yes ? Yes FAT16 / FAT16B / FAT16X
On a data structure level, bcachefs uses B-trees like many other modern file systems, but with an unusually large node size defaulting to 256 KiB. These nodes are internally log-structured , forming a hybrid data structure, reducing the need for rewriting nodes on update. [ 9 ]
zFS – z/OS File System; not to be confused with other file systems named zFS or ZFS. zFS - an IBM research project to develop a distributed, decentralized file system; not to be confused with other file systems named zFS or ZFS. ZFS – a combined file system and logical volume manager designed by Sun Microsystems
As the FSF (Free Software Foundation) claimed that there was a legal incompatibility between the CDDL and the GPL in 2005, Sun's implementation of the ZFS file system couldn't be used as a basis for the development of a module in the Linux kernel, couldn't be merged into the mainline Linux kernel, and Linux distributions generally did not include it as a precompiled kernel module.
ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.