Differences between version 9 and previous revision of UFS.
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Newer page: | version 9 | Last edited on Friday, July 7, 2006 2:38:19 pm | by CraigBox | Revert |
Older page: | version 8 | Last edited on Monday, May 15, 2006 12:30:21 pm | by CraigBox | Revert |
@@ -1,17 +1,13 @@
An [Acronym] for [Unix] FileSystem.
-''InNeedOfRefactor: this page is mostly confused and needs
a thorough revision after
a good research
of the filesystem history
.''
+UFS started out as
a layer on top of Berkeley Fast FileSystem (FFS), which was
a derivative
of the "FS"
filesystem used in the first versions of [UNIX] at [AT&T]. It was introduced in the 4.4[BSD] distribution and is common in its derivatives, such [FreeBSD], [NetBSD] and [OpenBSD], as well as [Solaris]. The [Linux] [Kernel] only includes experimental support
.
-It was originally developed from the first versions of [UNIX] at [AT&T]. The FileSystem reached its current status in the 4.x [BSD] distributions. It it currently used in [FreeBSD], [NetBSD] as well as [OpenBSD] and the [Solaris] Operating Environment. The [Linux] [Kernel] only includes experimental support.
-
-
[FreeBSD] versions
5.0 introduced UFS2, which allows FileSystem Snapshots, background fscking, as well as support for volumes over 1TB in size.
+[FreeBSD] version
5.0 introduced UFS2, which allows FileSystem Snapshots, background fscking, as well as support for volumes over 1TB in size.
[NetBSD] (since 1.5), [FreeBSD] (since 4.0) and [OpenBSD] (since 2.3) all employ an addition to UFS called SoftUpdates. SoftUpdates is which is a mechanism that allows a file system to safely use delayed writes for metadata updates. The results are consistent filesystems after powerloss/crash and much improved performance.
-Some variants also referred to as FFS (Such as in NetBSD?)
-
-
See [http
://www.mckusick.com/softdep/index.html
] for information
+See [WikiPedia
:Unix File System
] for more
information.
----
CategoryFileSystem %%%
CategoryInodeFileSystem