HP-UX 11i June 2002 Release Notes

New and Changed Disk and File Management Features
Additional Support for Striping and Mirroring
Chapter 11
196
Additional Support for Striping and Mirroring
new at 11i
original release
Logical Volume Manager (LVM) now supports striping and mirroring for shared volume
groups. Previously under HP-UX 11.0, a volume group could not be activated in shared
mode if any of its logical volumes were striped or mirrored. This restriction has now been
lifted.
Shared volume groups are provided to support ServiceGuard Oracle Parallel Server
(OPS), so this change only affects customers using OPS. Those customers are now free to
stripe their logical volumes (to improve throughput) or mirror them (for higher
availability).
NOTE Where performance is limited by I/O throughput, striping may help.
See also “MirrorDisk/UX” on page 105.
New Whitepaper on File and File System Sizes
new for
June 2001
There is a new whitepaper, Supported File and File System Sizes for JFS and HFS,
(5971-2383) available at the HP Documentation web site:
http://docs.hp.com
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 the following:
• 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)).
• a new disk layout (that is, version 4)
• a new command for tuning a VxFS file system: vxtunefs (see vxtunefs (1M) and
tunefstab (4))