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OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated.

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. For latest ext4 documentation, see Kernel Docs. Overview TLDR: Add crc32c to ext4 superblock, inode, block and inode bitmap, extent tree, directory block, htree block, MMP block, journal, and extended attribute objects with as few disk layout adjustments as possible. Regular: As much as we wish our storage hardware w

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Btrfs supports transparent file compression. There are three algorithms available: ZLIB, LZO and ZSTD(since v4.14). Basically, compression is on a file by file basis. You can have a single btrfs mount point that has some files that are uncompressed, some that are compressed with LZO, some with ZLIB, for instance (tho

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Deprecated This page is obsolete and may contain out-of-date information. The contents needs to be moved to new location. The btrfs restore utility is a non-destructive method for attempting to recover data from an unmountable filesystem. It makes no attempt to repair the filesystem, which means that you cannot cause

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. BTRFS has some key capabilities which enable efficient backup solutions: Instant, Atomic COW Snapshots Since the snapshots are atomic, when a snapshot is restored it appears to applications as if a power loss had occurred (and the filesystem has gone back to an earlier state). Thus it is possible to backup databases

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. For latest ext4 documentation, see Kernel Docs. Converting an ext2 filesystem to ext4 The recommended method for upgrading an ext2 filesystem to ext4 is to back up the entire volume, reformat the storage device with ext4, and restore the entire volume onto the fresh filesystem. This has the effect of defragmenting al

../ 2.1/ 19-Aug-2009 01:36 - 3.1/ 31-Jul-2005 16:05 - 3.3/ 17-Mar-2005 11:17 - 3.4/ 01-Mar-2005 01:38 - 3.5/ 28-Jul-2005 16:14 - 3.6/ 04-Apr-2006 16:59 - 3.7/ 06-May-2006 01:20 - 3.8/ 20-Apr-2012 10:55 - 3.9/ 20-Apr-2012 10:49 - 4.0/ 23-Jun-2005 12:09 - 4.0beta/ 15-Sep-2005 23:40 - 4.1/ 19-Oct-2005 12:09 - 4.2/ 04-Nov-2006 12:35 - 4.2beta/ 23-Oct-2005 11:17 - 4.3/ 27-Aug-2006 12:04 - 4.4/ 01-Nov-2

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Important Questions I have a problem with my Btrfs filesystem! See the Problem FAQ for commonly-encountered problems and solutions. If that page doesn't help you, try asking on IRC or the Btrfs mailing list. Explicitly said: please report bugs and issues to the mailing list (you are not required to subscribe). Then u

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. Note: This page is currently a work in progress. It started out as a private email to someone who currently uses Subversion. I decided to make it available and try to extend it further. I'll remove this comment when the page is improved.  :) -- Shawn Pearce S

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. This page is intended to give a slightly deeper insight into what the various Btrfs features are doing behind the scenes. Btrfs introduction in a talk If you'd like an overview with pointers to the more useful features and cookbooks, you can try Marc MERLIN's Btrfs talk at Linuxcon JP 2014. Data usage and allocation

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. This table displays key Serial ATA hardware features, as correlated with various SATA controller chips and Linux drivers. See key below. Vendor Chip Driver NCQ DMA++ hotplug PMP PMP SM AN NS NQM

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Btrfs is a modern copy on write (COW) filesystem for Linux aimed at implementing advanced features while also focusing on fault tolerance, repair and easy administration. Its main features and benefits are: Snapshots which do not make the full copy of files RAID - support for software-based RAID 0, RAID 1, RAID 10, .

This documentation is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. Git Wiki Homepage Welcome to the Git wiki web site. This wiki is a community effort to provide an accurate source of information for all things related to Git. Make sure to visit the Git website (http://git-scm.com) for current updates and information. The Gi

General software Those are public Git hosting sites where any project can be hosted, perhaps with exception to requirements for license used (some hosting sites require project to be open source or free software). A2Hosting provides paid Git hosting over SSH. Hosted on high-performance SwiftServer platform. Also features SSDs with page loads up to 300% faster than standard drives. Also offers VPS

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. Git User's Survey 2010 summary The "Git User's Survey 2010" has been closed on October 15, 2010. The survey could be found here: Git User's Survey 2010 (http://tinyurl.com/GitSurvey2010) at Survs.com ('closed'). The survey was be open from 1 September to 15 O

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. This procedure describes how to use the hdparm command to issue a Secure Erase ATA instruction to a target storage device. When a Secure Erase is issued against a SSD drive all its cells will be marked as empty, restoring it to factory default write performance. DISCLAIMER: This will erase all your data, and will not

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. With aliases, you can avoid typing the same commands over and over again. Aliases were added in Git version 1.4.0. Table of contents: Introduction To show how to use aliases, suppose you wish you could write git ci instead of git commit. You can achieve this

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. For latest ext4 documentation, see Kernel Docs. General Information Ext4 was released as a functionally complete and stable filesystem in Linux 2.6.28, and it's getting included in all the modern distros (in some cases as the default fs), so if you are using a modern distro, it's possible that you already have Ext4 s

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. Git Submodule Tutorial Submodule support has been available in Git since version 1.5.3. This tutorial explains how to create and publish a repository with four submodules using the git-submodule(1) command. Submodules maintain their own identity; the submodul

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. See also: GitFaq (Frequently Asked Questions) page. GitWorkflows which attempts to describe actual, useful, real-world things that people do with git, step by step. ExampleScripts - You can do a lot by writing a simple script. Aliases are very powerful ways t

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. When an SVN repository moves, the equivalent of svn switch for git-svn is required. See git-svn for info about using git as a client to subversion. General Case What immediately sprang to mind, and what was suggested e.g. on the mailing list, was to simply ed

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. General Questions What is Git? Git is a distributed version control system developed by Junio Hamano and Linus Torvalds. Git does not use a centralized server. Git runs on Linux, BSD, Solaris, Darwin, Windows, Android and other operating systems. Why the 'Git

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Linux Checkpoint/Restart Application checkpoint/restart (c/r) is the ability to save the state of a running application so that it can later resume its execution from the time at which it was checkpointed, on the same or a different machine. Project Info Kernel code: (browse the code) git://www.linux-cr.org/pub/git/l

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Background Up until recently, all ATA hard drives have been organized in 512byte sectors. For example, my 500GB or 477GiB hard drive is organized of 976773168 512 byte sectors numbered from 0 to 976773167. This is how a drive communicates with the driver. When the operating system wants to read 32 KiB of data at 1MiB

OBSOLETE CONTENTThis wiki has been archived and the content is no longer updated. Please visit git-scm.com/doc for up-to-date documentation. Git Documentation Git glossary (GitWiki version, HTML version, source via gitweb) Git manual page - Online version bundled with Git. (The information displayed when using the command man git or git help) Git User's Manual - Online version bundled with Git A t