VERITAS File System 4.1 (HP OnlineJFS/JFS) Release Notes (December 2005)

VERITAS File System 4.1 Release Notes
Compatibility With Previous Versions of VxFS
Chapter 116
Compatibility With Previous Versions of VxFS
VxFS 4.1 file systems employ Disk Layout Version 6. With the VxFS 4.1 release, you can no
longer create or mount Disk Layout Version 3 file systems. VxFS 4.1 is the last major release
to support Disk Layout Version 4 and Disk Layout Version 5. HP recommends upgrading any
previously installed VxFS file system to the Disk Layout Version 6 available with VxFS 4.1.
After installing Base-VxFS 4.1, you can upgrade the disk layout on mounted file systems
using the vxupgrade command (see the vxupgrade(1M) manual page for details), or
vxfsconvert (see the vxfsconvert(1M) manual page) to upgrade the disk layout of
unmounted file systems post installation.
CAUTION VxFS file systems must be cleanly unmounted before upgrading to the
VERITAS File System 4.1 release from any previous release.
Required HP-UX Patches
For a list of the required HP-UX patches, refer to the VERITAS 4.1 Installation Guide.
NOTE If LVM is going to be used with Disk Layout Version 6 and VxFS 4.1, the LVM
patch PHCO_33308 needs to be installed. This patch provides the correct LIBC
relink with LVM
If LVM is used the user needs to install the following patches as a safeguard for potential data
corruption.
• LVM
The default disk layout of VxFS 4.1 is version 6. When reducing a volume, LVM checks on
the volume to prevent part of the existing filesystem from getting lost. Likewise, when an
LVM physical volume is created, LVM checks to make sure that it is not clobbering an
existing filesystem. LVM does not recognize a VxFS 4.1 filesystem with disk layout
version 6. To make LVM work with Disk Layout Version 6, PHCO_33308 needs to be
installed.
• swapon
PHCO_33238 must be installed on the system for swapon command to enable VxFS 4.1
filesystem for paging.