Three disk layouts are available with the VxFS file system:
Version 2 | The Version 2 disk layout
was designed to support features such as filesets, dynamic inode
allocation, and enhanced security. |
Version 3 | The Version 3 disk layout
encompasses all file system structural information in files, rather
than at fixed locations on disk, allowing for greater scalability.
Version 3 supports files and file systems up to one terabyte in
size. |
Version 4 | The Version 4 disk layout
supports access control lists (ACLs). |
 |
| |
|
 | NOTE: The Version 1 disk layout is not supported on HP-UX. |
|
| |
|
The following topics are covered in this chapter:
When HP-UX 11.1x is installed on a system, new VxFS file systems
are created with the Version 4 layout by default. When JFS 3.3 is
installed on an HP-UX 11.00 system, new file systems are created
with the Version 3 layout by default. Although mkfs allows the user to specify other disk layouts,
it is generally preferable to use the Version 4 layout for new file
systems.
The vxupgrade command can upgrade an existing Version 3 VxFS
file system to the Version 4 layout while the file system remains
online. vxupgrade can also upgrade a Version 2 file system to the
Version 3 layout. See vxupgrade(1M) for details on upgrading VxFS file systems.You
cannot downgrade a file system that has been upgraded.
|
| |
|
| NOTE: You cannot upgrade the root (/) or /usr file systems to Version 4 on an 11.00 system running
JFS 3.3. Additionally, we do not advise upgrading the /var or /opt file systems to Version 4 on an 11.00 system.
These core file systems are crucial for system recovery. The HP-UX
11.00 kernel and emergency recovery media were built with an older
version of JFS that does not recognize the Version 4 disk layout.
If these file systems were upgraded to Version 4, your system might
have errors booting with the 11.00 kernel as delivered, or booting
with the emergency recovery media. |
|
| |
|
Printable version
