HP-UX 11i June 2001 Release Notes

New and Changed Disk and File Management Features
New Version of Journaled File System (JFS) (new at 11i original release)
Chapter 9182
New Version of Journaled File System (JFS)
(new at 11i original release)
HP-UX 11i includes a new version of the Journaled File System (JFS),
version 3.3 as opposed to the previous version 3.1. (JFS is also known as
the VERITAS File System or VxFS).
New features in JFS 3.3 include:
• support for access control lists (ACLs), the only HFS feature
unavailable in JFS 3.1 (see aclv (5), getacl (1), setacl (1), acl (2), and
aclsort (3C)). Now JFS contains a superset of HFS functionality. This
enables all users to consider migration from HFS to JFS.
• a new disk layout, that is, version 4
• a new command for tuning a VxFS file system, vxtunefs (see vxtunefs
(1M) and tunefstab (4))
• a new command, vxfsconvert, for converting an HFS file system to a
JFS file system. This command will also convert HFS ACLs to JFS
ACLs, with some limitations (see vxfsconvert (1M)).
• performance enhancements
• new packaging and licensing strategy for HP OnLineJFS 3.3 (see
vxlicense (1M) and vxenablef (1M))
• a better solution for the file system shrink limitation when using the
version 4 disk layout
Withthe HP-UX 11irelease,JFS becomes a supersetofthefunctionality
available in HFS now that JFS includes support for ACLs.
In HP-UX 11i, one kernel library will contain the kernel functionality for
both the JFS and the OnLineJFS products. When you install the JFS
product, all the software for OnLineJFS will also be installed, but its
features will not be enabled unless you also purchase and install HP
OnLineJFS.
Having all the kernel functionality for both products in one library will
resolve many of the patching problems that existed in previous releases.
With the JFS version 4 disk layout in JFS 3.3, you are much less likely to
encounter the file system shrink limitation that existed in JFS versions
in HP-UX 10.20 and 11.0. That is, previously JFS could not shrink a file