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Topic: UFS2

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	Little UFS2 FAQ
		UFS2 is an extension to the well-known UFS.
		UFS2 uses the same basic technologies as modern UFS1 (inodes, linear directory layout, soft updates, snapshotting, background file system checking, etc) so it was a relatively low-risk change.
		As of 2003/04/02 UFS2 is not (yet) the default type for FFS filesystems.
	lists.freebsd.org /pipermail/freebsd-current/2003-April/001444.html (508 words)

	Unix File System - Wikipedia, the free encyclopedia
		FreeBSD extended the FFS and UFS layers to support a new variant, called UFS2, which adds 64-bit block pointers (allowing volumes larger than 1TB), variable-sized blocks (similar to extents), extended flag fields and extended attribute support.
		Linux includes a UFS implementation for binary compatibility at the read level with other Unixes, but since there is no standard implementation for the vendor extensions to UFS, Linux does not have full support for writing to UFS.
		Note that the distinction this draws between FFS and UFS is wrong; both terms are used at present and have been used in the past.
	en.wikipedia.org /wiki/UFS2 (1082 words)

	Little UFS2 FAQ (2003/04/25, v15.a) (Site not responding. Last check: 2007-11-01)
		UFS2 was developed by Kirk McKusick and Poul-Henning Kamp, but is based in large part on the existing UFS1 file system, which had a host of contributors.
		UFS2 development was sponsored by DARPA and Network Associates Laboratories, and motivated by the requirements of the TrustedBSD Project.
		UFS2 was ported to NetBSD by Frank van der Linden, sponsored by Wasabi Systems.
	sixshooter.v6.thrupoint.net /jeroen/faq.html (798 words)

	[No title]
		UFS2 provides native support for extended -attributes, larger disk sizes, and forward compatibility with new -on-disk high performance directory layout and storage extents.
		Also, UFS2 is not currently recommended as a root -file system format for non-64-bit platforms due to increased size -of the boot loader; special local configuration is required to boot -UFS2 as a root file system on i386 and PC98.
		UFS2 is the recommended file system, but +if disks are to be used on older FreeBSD systems, UFS1 improves +portability.
	www.watson.org /~robert/freebsd/ufs2_default.diff (251 words)

	McKuick: Enhancements to the Fast Filesystem To Support Multi-Terabyte Storage Systems
		On a typical UFS2 filesystem with 16 kilobyte blocks and 2 kilobyte fragments, the data-block map requires 64 megabytes of memory per terabyte of filesystem.
		Because UFS2 does not preallocate inodes, but rather allocates the inodes as they are needed, the memory required is dependent on the number of files that are created in the filesystem.
		The purpose of UFS2 was not to try and improve on the performance of UFS1 which is already within 80-95% of the bandwidth of the disk.
	ace.delos.com /kirk (8864 words)

	grub (Site not responding. Last check: 2007-11-01)
		As discussed on lfs-hackers, grub does not pass its checks because a ufs2 file is too large with gcc-3.4.
		ufs2 is still built and the check fails.
		It appears that ufs2 is not usable, but I don't beleve a lot of people need it.
	www.linuxfromscratch.org /pipermail/lfs-dev/2004-June/046850.html (122 words)

	OSNews.com
		As UFS1 was the default, I'm sure many have installed 5 believing without a second thought that UFS2 would be used on all of their filesystems.
		However, UFS2 was designed with ACLs and extended attributes in mind while this support for UFS1 was somehow bolted on as an afterthought.
		The main performance gains of UFS2 will be for those that use ACLs (and extended attributes).
	www.osnews.com /comment.php?news_id=3334&limit=no (503 words)

	Hardening the FreeBSD UFS2 Filesystem
		Those of us who dabble in stress testing have also learned the hard way that running a background fsck is not always a good idea.
		By using a small test program, a modified version of newfs(8), a few kernel modifications and some small test scripts I will try to prove that the bad_dir panics are caused by mounting an unclean filesystem and that the UFS2 filesystem code does not handle this gracefully.
		It seems that the UFS2 filesystem code is not robust enough to handle mounting of unclean filesystems, so in order to run background fsck successfully these problems should probably be addressed.
	people.freebsd.org /~pho/baddir.html (482 words)

	[No title]
		Little UFS2 FAQ (20023/04/23, v9), culled from contributions by: "Alex Wilkinson" "Alexander Pohoyda" "Anthony CARTER" "Bruce Evans"
		UFS2 -introduced in FreeBSD 5-CURRENT- is an extension to the well-known UFS.
		UFS2 has the potential to be faster for really large files by using jumbo blocks, but the code to do that has yet to be written.
	www103.pair.com /parv/comp/unix/freebsd/Little_UFS2_FAQ.txt (548 words)

	Large data storage in FreeBSD
		The UFS2 filesystem was introduced in 2003 as a replacement to the original UFS and provides 64 bit counters and offsets.
		This allows for files and filesystems to grow to 2^73 bytes (2^64 * 512) in size and hopefully be sufficient for quite a long time.
		UFS2 largely solved the storage size limits imposed by the filesystem.
	www.freebsd.org /projects/bigdisk (1041 words)

	GSM-Forum - UFS2 TORNADO, Test results ! (Site not responding. Last check: 2007-11-01)
		I didn't had the time to finish manual for this part of UFS2 software, it will be done in next few days, of course.
		This box is designed in way which alows us to upgrade it with many other options and features.
		These cables are the best quality i ever used, and now i can see why so many guys were complaining to other boxes producers.
	forum.gsmhosting.com /vbb/printthread.php?t=111159 (716 words)

	current-users: initial UFS2 support committed (Site not responding. Last check: 2007-11-01)
		I just committed the first part of the UFS2 code, derived from the FreeBSD code.
		Since a few structures were renamed, and the superblock layout for FFS changed, this touches quite a lot of files.
		UFS2 is not (yet) the default type for FFS filesystems.
	mail-index.netbsd.org /current-users/2003/04/02/0005.html (269 words)

	UFS tools on Linux (Site not responding. Last check: 2007-11-01)
		This projects aims to provide tools to support UFS and UFS2 filesystems on Linux.
		ufs2 read only support is included into linux kernel 2.6.5 onwards.
		Apr 5, 2004 : The READ-ONLY patches for UFS2 are now included in mainline kernel 2.6.5 onwards.
	ufs-linux.sourceforge.net (134 words)

	bsdforums.org - FreeBSD, OpenBSD, NetBSD, MacOS X, Darwin, Linux, BSD Unix forums, message boards, discussions and ...
		the ufs2 flag into a ufs1 flag, since ufs2 is now the default and
		It said UFS2 has new features but it did not say has performance gain.
		I remember I installed 5.0R and the help in the disklabel screen said something about using ufs1 instead of ufs2 on the root partition.
	www.freebsdforums.org /forums/showthread.php?threadid=9009 (619 words)

	LWN: What's New in FreeBSD 5.3
		Compared to UFS in FreeBSD 4, UFS2 provides several useful features, such as extended file attributes and support for larger file sizes - at the expense of lost compatibility with UFS.
		FreeBSD 4 does not understand UFS2 and it is not possible to convert between the two file systems (as one would between ext2 and ext3 in Linux).
		However, the upgrade process will probably be a lot more complex than a re-install, with a further functionality loss due to unavailability of UFS2 features in the upgraded system.
	lwn.net /Articles/108497 (1510 words)

	LWN: Patch: [2.6] UFS2 Read Only Patch
		They provide the bare minimum read-only support for ufs2 variant (from FreeBSD 5.x) of the UFS filesystem.
		The patch for 2.6.3 is here : http://ufs-linux.sourceforge.net/ufs2/2.6.3/ufs2-read-only-p1.txt http://ufs-linux.sourceforge.net/ufs2/2.6.3/ufs2-read-only-p2.txt Thanks Niraj >Hi, > >I am trying to produce some patches to be able to >support UFS2 (of FreeBSD 5.x) filesystem.
		> >The work-in-progress patches are available from >http://ufs-linux.sourceforge.net/ufs2/p1.txt > http://ufs-linux.sourceforge.net/ufs2/p2.txt > >Currently, these provides the bare minimum ufs2 >support and that also for Read-Only.
	lwn.net /Articles/71667 (160 words)

	OpenSolaris Forums: Any interest in UFS2 ? ...
		Is there any interest in UFS2, I believe Sun may have attempted an implementation in the past, (Solaris 9 timeframe) so there may be code in Sun already.
		As a company I am not sure if there is interest to pursue UFS2.
		UFS2 was designed from a BSD's point of view.
	www.opensolaris.org /jive/thread.jspa?messageID=2865 (1637 words)

	Daemon News '200501' : '"FreeBSD UFS2 Snapshots Management Environment "'
		The FreeBSD 5 UFS2 filesystem provides the possibility to create snapshots of live filesystems.
		It is already best known (and can be easily used) for allowing fsck(8) to run in the background (see rc.conf variable
		With those three solutions, FreeBSD UFS2 snapshots are available to our unprivileged users as a short-time backup solution, allowing them to easily recover their older file states.
	ezine.daemonnews.org /200501/snapshot.html (636 words)

	GSM EXPORT - ATS COMMUNICATION INDONESIA
		UFS2: tidak meiliki port USB HUB (yang berguna untuk melakukan paralel box, artinya: kita bisa menghubungkan sampai dengan 5 box UFS agar dapat melakukan proses flashing pada saat yang bersamaan)
		Dan seluruh box UFS yang ada sampai saat ini (1 September 2005) masih tetap menggunakan driver dari UFS2.
		Oleh karena itu, di sebelah kiri-bawah masih bertuliskan UFS2.
	www.ats-com.com /id/detailnews.php?id=33 (504 words)

	Shanker Balan: Homepage: Tech Page
		* UFS2 FileSystem Using UFS2 with Soft Updates for all my partitions for the new improved Extented Attributes and ACLs which it provides.
		UFS2 has also been made the default filesystem for new FreeBSD Install since April 2003.
		To get the same level of features in Linux and other BSD distributions, I will probably need to grep for 101 patches on the web.
	www.shankerbalan.net /load.php?q=bsd&PHPSESSID=c4c2d02609bf5e714e1305fd1e9cc62d (559 words)

	[BUGA] FFS + UFS2 (Site not responding. Last check: 2007-11-01)
		UFS2 is now the default > format for newfs(8).
		On all platforms except for pc98, filesystems > created from within sysinstall(8) will use UFS2 by defau > -- > > I don't understand the difference between the two.
		Is the difference > analogous to the difference between, say, ReiserFS and EXT3 [i.e.
	www.auug.org.au /pipermail/buga/2003-June/000181.html (273 words)

	Articles
		UFS2 is the Unix File System that FreeBSD uses.
		Developers Scott Long and Brian Wilson are working on journaling support for UFS2.
		FreeBSD supports the ext3 filesystem in read-only mode, which can be a barrier to interoperability for some users.
	os.newsforge.com /print.pl?sid=06/01/03/1957255 (803 words)

	Comments for LFS-Book V6.0-testing-200407022 (Site not responding. Last check: 2007-11-01)
		Scott Lemke wrote: > Grub fails the tests because of ufs2, and using the configure option > --disable-ufs2 still does nothing to fix this.
		This results in the ufs2 stage1.5 loader being too large to fit in the hidden boot area of a ufs2 filesystem, so the test fails.
		The simplest fix is to get --disable-ufs2 to actually work, but you are right, that is an upstream issue.
	www.linuxfromscratch.org /pipermail/lfs-dev/2004-July/047797.html (167 words)

	File System Access Control Lists
		Extended attributes are natively supported in the next generation UNIX file system, UFS2.
		Note: A higher level of administrative overhead is required to configure extended attributes on UFS1 than on UFS2.
		As a result, UFS2 is generally recommended in preference to UFS1 for use with access control lists.
	www.frenzy-corp.com /freebsd/fs-acl.html (425 words)

	Gentoo Forums :: View topic - Mini-Mini-Howto: Mount FreeBSD Filesystems (UFS1 and UFS2)
		UFS1 is used in FreeBSD 4-STABLE as the default, UFS2 became default as of FreeBSD 5.1.
		Depending on whether your FreeBSD partitions are of type UFS1 or UFS2 you need to apply different mount options.
		I only have disks of type UFS1 so I can't verify that it is possible to mix UFS1 and UFS2 mounts.
	forums.gentoo.org /viewtopic-t-209074.html (995 words)

	TrustedBSD - Components
		UFS2 was implemented to provide improved performance and reliability for extended attributes, and has been available since FreeBSD 5.0.
		UFS2 became the default in FreeBSD 5.1, and is the recommended file system for TrustedBSD functionality.
		Capabilities provide support for fine-grained process capabilities to authorize non-root processes to access privileged system resources, reducing requirements for a superuser account, and reducing risk in the event of compromise.
	www.trustedbsd.org /components.html (748 words)

	GNU GRUB - Bugs: bug #7550, UFS2 patch [Savannah]
		GNU GRUB - Bugs: bug #7550, UFS2 patch
		You are not allowed to post comments on this tracker with your current authentification level.
		Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
	savannah.gnu.org /bugs/?func=detailitem&item_id=7550 (151 words)

	DirectoryStorage and UFS2 \| Zope \| Users
		I am unsure whether UFS2 would best utilize the "chunky" or "busy"
		Whether this holds true for UFS2 or not I don't
		Whether this holds true for UFS2 or not
	www.gossamer-threads.com /lists/zope/users/167532 (426 words)

	ECTRN 174-Computer Forensics: Operating Systems Internals (Site not responding. Last check: 2007-11-01)
		Students will explore the internal workings of computer operating systems and perform forensic examinations of various operating systems.
		Students will analyze FAT, NTFS, Ext2, Ext3, UFS1, and UFS2 file systems and data structures.
		Students will learn to recognize systems that have been compromised by viruses or other intrusive programs, and will be able to locate corrupt, hidden or deleted data.
	www.solano.edu /webcms/display.asp?course_id=12433&print=1 (219 words)

	bsdforums.org - FreeBSD, OpenBSD, NetBSD, MacOS X, Darwin, Linux, BSD Unix forums, message boards, discussions and ...
		I am expecting that UFS2 will be better.
		04-21-2003 04:39 AM It said UFS2 has new features but it did not say has performance gain.
		04-21-2003 12:23 PM UFS2 is UFS1 + new features.
	www.freebsdforums.org /forums/printthread.php?t=9009 (568 words)

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