Editing HFS Plus (section)

=== Linux ===
The [[Linux kernel]] includes the hfsplus module<ref>{{cite web|url=https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=fs/hfsplus;hb=HEAD|archive-url=https://archive.today/20120709100649/http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=fs/hfsplus;hb=HEAD|url-status=dead|archive-date=2012-07-09|title=kernel/git/torvalds/linux.git – Linux kernel source tree}}</ref> for mounting HFS+ filesystems read-write. HFS+ [[fsck]] and [[mkfs]] have been ported to [[Linux]] and are part of the hfsprogs package.<ref>{{cite web|url=http://packages.debian.org/sid/hfsprogs|title=Debian – Details of package hfsprogs in sid|url-status=live|archive-url=https://web.archive.org/web/20090703165004/http://packages.debian.org/sid/hfsprogs|archive-date=2009-07-03}}</ref>

In 2009, these drivers were diagnosed to be corrupting HFS+ drives with a capacity greater than 2&nbsp;TB.<ref>{{Cite web|url=https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5c36fe3d87b3f0c85894a49193c66096a3d6b26f|archive-url=https://archive.today/20120711142712/http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5c36fe3d87b3f0c85894a49193c66096a3d6b26f|url-status=dead|archive-date=2012-07-11|title=kernel/git/torvalds/linux.git – Linux kernel source tree|website=git.kernel.org|access-date=2016-10-14}}</ref> Consequently, Linux distributions such as Debian and Ubuntu stopped allowing mounting of HFS+ drives or partitions greater than 2&nbsp;TB.<ref>{{cite web|url=http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550010|title=#550010 – hfsplus corrupts filesystems >2TB – Debian Bug report logs|access-date=2011-02-17|archive-url=https://web.archive.org/web/20160108163119/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550010|archive-date=2016-01-08|url-status=live}}</ref> {{As of|2011|2}}, work is in progress to lift this restriction.<ref>{{cite web|url=http://www.spinics.net/lists/linux-fsdevel/msg42242.html|title=[PATCH 2/3] hfsplus: lift the 2TB size limit — Linux Filesystem Development|url-status=live|archive-url=https://web.archive.org/web/20110718213210/http://www.spinics.net/lists/linux-fsdevel/msg42242.html|archive-date=2011-07-18}}</ref> {{update after|2015|5|3}}

Under Linux's current HFS+ driver, journaling must be disabled in order to write data safely onto an HFS+ partition. Provided the partition isn't being used by Apple's [[Time Machine (macOS)|Time Machine]] software, journaling can be disabled under macOS:<ref name="superuser-force">{{cite web|url=http://superuser.com/questions/84446/how-to-mount-a-hfs-partition-in-ubuntu-as-read-write|title=How to mount a HFS partition in Ubuntu as Read/Write?|url-status=live|archive-url=https://web.archive.org/web/20111130084754/http://superuser.com/questions/84446/how-to-mount-a-hfs-partition-in-ubuntu-as-read-write|archive-date=2011-11-30}}</ref> Using Disk Utility in OS X Yosemite, the user may hold Alt/Option and click "Disable Journaling" on the File menu, having first selected a mounted partition.

An HFS+ partition with journaling enabled may be forcibly mounted with write access under Linux, but this is unsupported and unwise.<ref name="superuser-force"/><ref>{{Citation | title = Macintosh HFSPlus Filesystem for Linux | last = Banks | first = Wyatt | date = 2007-07-31<!-- 00:38:10 -0700--> | url = https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob_plain;f=Documentation/filesystems/hfsplus.txt;hb=60fd4d6a1953accd3d57f8e4f3b0f4692598bf4e | url-status = dead | archive-url = https://archive.today/20120722061818/http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob_plain;f=Documentation/filesystems/hfsplus.txt;hb=60fd4d6a1953accd3d57f8e4f3b0f4692598bf4e | archive-date = 2012-07-22 }}</ref>

A [[Google Summer of Code]] project to implement write support to journaled HFS+<ref>{{cite web|url=http://www.google-melange.com/gsoc/proposal/review/google/gsoc2011/naota/1|title=Implement HFSPlus Journal on Linux|archive-url=https://web.archive.org/web/20110405082701/http://www.google-melange.com/gsoc/proposal/review/google/gsoc2011/naota/1|archive-date=April 5, 2011}}</ref> was accepted by the Linux Foundation in 2011 but was not completed at that time and is still a work in progress. Progress and improvements to the HFS+ driver, including some updates to journaling support, are posted on the linux-fsdevel mailing list<ref>{{cite web|url=http://marc.info/?l=linux-fsdevel&w=2&r=1&s=hfsplus&q=b|title='hfsplus' in linux-fsdevel – MARC|access-date=2012-09-21|archive-url=https://web.archive.org/web/20160108163118/http://marc.info/?l=linux-fsdevel&w=2&r=1&s=hfsplus&q=b|archive-date=2016-01-08|url-status=live}}</ref> from time to time.

{{As of|2011|7}}, [[Paragon Software Group]] provided kernel drivers that allow full read-write access to HFS+ journaled volumes.<ref>{{cite web|url=http://www.paragon-software.com/home/ntfs-linux-per/|title=Overview – Paragon NTFS&HFS+ for Linux 9.5 Express|access-date=2012-06-29|archive-url=https://web.archive.org/web/20110806092933/http://www.paragon-software.com/home/ntfs-linux-per/|archive-date=2011-08-06|url-status=live}}</ref> The product is a proprietary implementation of HFS+ based on Paragon's proprietary UFSD library. There are both free and paid editions of the driver, and they include a utility for checking and repairing HFS+ volumes. According to the online documentation (free version<ref>{{cite web|url=http://www.paragon-software.com/home/ntfs-linux-per/features.html|title=Full Features – Paragon NTFS/HFS+ for Linux 9.5 Express|access-date=2012-09-21|archive-url=https://web.archive.org/web/20120903064043/http://www.paragon-software.com/home/ntfs-linux-per/features.html|archive-date=2012-09-03|url-status=live}}</ref> or the paid edition<ref>{{cite web|url=http://www.paragon-software.com/business/ntfs-linux-professional/features.html|title=Full features – Paragon NTFS&HFS+ for Linux 9.5 Professional|access-date=2012-09-21|archive-url=https://web.archive.org/web/20121202071435/http://www.paragon-software.com/business/ntfs-linux-professional/features.html|archive-date=2012-12-02|url-status=live}}</ref>), both the free edition and the paid edition currently support Linux kernels from 2.6.36 up to 4.12.x. [[Ubuntu (operating system)|Ubuntu]], [[Debian]], [[Fedora Linux]], [[Rocky Linux]], [[Red Hat Enterprise Linux]], [[OpenSUSE]] and [[CentOS]] are the only Linux distributions officially supported.<ref>{{cite web|url=http://www.paragon-software.com/home/ntfs-linux-professional/faq.html|title=FAQ & Glossary – Paragon NTFS&HFS+ for Linux 9.5 Professional|access-date=30 June 2016|archive-url=https://web.archive.org/web/20160607171924/http://www.paragon-software.com/home/ntfs-linux-professional/faq.html|archive-date=2016-06-07|url-status=live}}</ref>