Veritas File System 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Appendix C 229
C Disk Layout
Disk Layout
The disk layout is the way file system information is stored on disk. On VxFS, six different disk layout
versions were created to take advantage of evolving technological developments. The disk layout versions
used on VxFS were:
Some of the disk layout versions were not supported on all UNIX operating systems. Version 2 and 3 file
systems can still be mounted, but this will be disallowed in future releases. Currently, the Version 4, Version
5, and Version 6 disk layouts can be created and mounted. Version 6 is the default disk layout version.
Table C-1
Version 1 The Version 1 disk layout is the original VxFS disk layout
provided with pre-2.0 versions of VxFS.
Not Supported
Version 2 The Version 2 disk layout supports features such as filesets,
dynamic inode allocation, and enhanced security. The Version
2 layout is available with and without quotas support.
Not Supported
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.
Not Supported
Version 4 The Version 4 disk layout encompasses all file system
structural information in files, rather than at fixed locations on
disk, allowing for greater scalability. Version 4 supports files
and file systems up to two terabytes in size.
Supported
Version 5 Version 5 enables the creation of file system sizes up to 32
terabytes. Files can be a maximum of two terabytes. File
systems larger than 2 TB must be created on a VERITAS
Volume Manager volume. Version 5 also enables setting up to
1024 access control list (ACL) entries.
Supported
Version 6 The Version 6 disk layout enables features such as
multi-volume support, cross-platform data sharing, named data
streams, and file change log.
Supported