Differences

This shows you the differences between two versions of the page.

--- hfs [2011/05/12 16:27] – PedroGiffuni
+++ hfs [2023/08/24 17:05] (current) – Added note on transferring files off of HFS. JonathanFrech
@@ Line 1: / Line 1: @@
 ====== HFS ======
-The **Hierarchical File System (HFS)** is a filesystem designed by Apple Inc. in
+HFS stands for the **Hierarchical File System** which was a filesystem designed by Apple Inc. in the mid 80's for Mac OS. It became part of Openstep, and has become ubiquitous
-the mid 80's for Mac OS and has become ubiquitous with the success of the OS X
+with the success of the OS X and related devices like iPods and iPads.
-and related devices like iPods and iPads.
-HFS is known for it's revolutionary design, introducing "resource forks" (somewhat
+HFS was known for its revolutionary design, introducing "resource forks" (somewhat
-like Extended Attributes) and other features required for their GUI oriented OS.
+like Extended Attributes) and specific features required for their GUI-oriented OS.
 As time has passed, new requirements have been added to the OS and the filesystem
-has had to adapt. Many new features like delayed allocation and journalling were
+evolved: many new features like journalling and delayed allocation were
-added to the point of renaming it "HFS Plus".
+added to the point of renaming it "HFS Plus". HFS Plus includes most of the capabilities one can find in UFS or Berkeley FFS: long file names, hard and soft links, special nodes, owner and group information and access permissions to name prominent features.
-The HFS and HFS Plus code has been released under APSL as part of Apple Darwin's
+The HFS and HFS Plus source code has been released under APSL as part of Apple
-XNU and userland utilities. In 2004 an initial port to %%FreeBSD%% 5.5 was made but
+Darwin's [[http://opensource.apple.com/source/xnu/|XNU]] kernel and userland utilities. In 2004, an initial port to %%FreeBSD%%
-the port was left unattended and eventually abandoned. It would be a good reference
+.3 was made but the port was left unattended and eventually abandoned. It
-for a renewed port.
+would be a good reference for a renewed port.
-Another idea that has been considered is to add a Darwin compatibility layer
+Because of this lack of support for HFS in %%FreeBSD%%, transferring files off of an HFS volume is easiest done booting into a Mac OS X system. Barring network file transfer, the %%ExFAT%% filesystem might be a suitable escrow filesystem since it supports large files and is mountable under both Mac OS X and %%FreeBSD%% (''%%# kldload fusefs && pkg install -y fusefs-exfat && mount.exfat-fuse /dev/adaNs1 mountpoint/%%''). %%ExFAT%% through FUSE, however, seems to munge file permissions.
-(similar to the opensolaris layer used by ZFS) to help porting it along with
-other interesting filesystems in Darwin's codebase like smbfs and ntfs.
-%%NetBSD%% had a %%GSoC%% project that resulted in 2007 in a limited HFS port under a
+%%NetBSD%% had a %%GSoC%% project that resulted in limited HFS [[http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/fs/hfs/|support]]
-BSD license.
+under a BSD license.
+For good or bad, Apple has replaced HFS with its own [[https://en.wikipedia.org/wiki/Apple_File_System|Apple File System]] (APFS) in recent versions of macOS and iOS.
 === References ===
-This page is a dumping ground for HFS related information. Maybe in the future it
+This page is a dumping ground for HFS related information.
-will be useful.
+  * [[http://web.archive.org/web/20090603104308/http://people.freebsd.org/~yar/hfs/|HFS and HFS Plus in FreeBSD (5.3)]] //(from Webarchive)//
+  * [[https://developer.apple.com/legacy/library/technotes/tn/tn1150.html|TN1150: HFS Plus Volume Format]]
+  * [[http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/mount_hfs.8.html|HFS mount(8) manpage]]
+  * [[http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/newfs_hfs.8.html|HFS newfs(8) manpage]]
+  * [[http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/fsck_hfs.8.html|HFS fsck(8) manpage]]
+  * [[http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/hfs.util.8.html|HFS util(8) manpage]]
+----
-  * http://people.freebsd.org/~yar/hfs/ (Initial %%FreeBSD%% 5.5 port)
+{{tag>Apple}}
-  * http://developer.apple.com/technotes/tn/tn1150.html
-  * http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/newfs_hfs.8.html
-  * http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/hfs.util.8.html
-  * http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/mount_hfs.8.html
-  * http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/fsck_hfs.8.html