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Basic example of an LVM head Inner workings of the version 1 of LVM. In this diagram, PE stands for a Physical Extent. Typically, the first megabyte of each physical volume contains a mostly ASCII-encoded structure referred to as an "LVM header" or "LVM head". Originally, the LVM head used to be written in the first and last megabyte of each PV ...
This preserves an old version of the LV, the snapshot, which may be later reconstructed by overlaying the copy-on-write table atop the current LV. Unless the volume management supports both thin provisioning and discard, once an LE in the origin volume is written to, it is permanently stored in the snapshot volume.
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.
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Ubuntu 8.04 was the first version of Ubuntu to include the Wubi installer on the Live CD that allows Ubuntu to be installed as a single file on a Windows hard drive without the need to repartition the disk. The first version of the Ubuntu Netbook Remix was also introduced. [56]
FAT (8-bit) Microsoft (Marc McDonald) for NCR: 1977 Microsoft Standalone Disk BASIC-80 (later Microsoft Standalone Disk BASIC-86) DOS 3.x: Apple: 1978 Apple DOS: UCSD p-System: UCSD: 1978 UCSD p-System: CBM DOS: Commodore: 1978 Commodore BASIC: Atari DOS: Atari: 1979 Atari 8-bit: Version 7 Unix file system (V7FS) Bell Labs: 1979 Version 7 Unix ...
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.
Volume [7] 2005 HDFS: Java Apache License 2.0 Java and C client, HTTP, FUSE [8] transparent master failover No Reed-Solomon [9] File [10] 2005 IPFS: Go Apache 2.0 or MIT HTTP gateway, FUSE, Go client, Javascript client, command line tool: Yes with IPFS Cluster: Replication [11] Block [12] 2015 [13] JuiceFS: Go Apache License 2.0 POSIX, FUSE ...