HP-UX 11i June 2002 Release Notes

New and Changed Disk and File Management Features
New Version of Journaled File System (JFS)
Chapter 11
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• a new command, vxfsconvert, for converting an HFS file system to a JFS file
system. This command also converts 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
With the HP-UX 11i release, JFS becomes a superset of the functionality available in
HFS now that JFS includes support for ACLs. This enables all users to consider
migration from HFS to JFS.
In HP-UX 11i, one kernel library contains the kernel functionality for both the JFS and
the OnLineJFS products. When you install the JFS product, all the software for
OnLineJFS is also installed, but its features are not enabled unless you also purchase it.
Having all the kernel functionality for both products in one library resolves 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 earlier JFS versions in HP-UX 10.20 and
11.0. In other words, JFS previously could not shrink a file system if there were file
extents residing in the area being reduced. Now, JFS 3.3 (with the version 4 disk layout)
will attempt to move extents off the area of the file system being reduced. This provides
a greater chance of success when shrinking JFS file systems. However, there may still be
some occasions where JFS cannot move extents off the area of the file system being
reduced, in which case a shrink will still fail.
Documentation
All VxFS manual pages are updated, as are the manual pages for generic HP-UX
commands and functions which accommodate ACLs (cp and find, for instance). See
Managing Systems and Workgroups: A Guide for HP-UX System Administrators, part no.
B2355-90742, for a description of JFS ACLs and how to use them.
The HP JFS 3.3 and HP OnLineJFS 3.3 VERITAS File System 3.3 System
Administrator's Guide is available on HP’s documentation web site at
http://docs.hp.com and on the Instant Information CD, in both HTML and PDF
formats.
Compatibility Issues
JFS ACLs use a different format from HFS ACLs. However, the new command,
vxfsconvert (1M) will convert an HFS file system to a JFS file system, as well as HFS
ACLs to JFS ACLs (with the limitation that HFS ACLs with no JFS ACL equivalents
are not converted). See Managing Systems and Workgroups: A Guide for HP-UX System
Administrators, part no. B2355-90742, for a description of the procedure for converting a
file system.
Note that JFS ACLs require a file system with the new disk layout (version 4). To
upgrade a file system from an older disk layout to version 4, you can use the vxupgrade
command.