Veritas 5.0.1 Installation Guide HP-UX 11i v3 (5900-2464, September 2012)

RAID-5 (Striping with Parity)
Although both mirroring (RAID-1) and RAID-5 provide redundancy of data, they use different
methods. Mirroring provides data redundancy by maintaining multiple complete copies of the data
in a volume. Data being written to a mirrored volume is reflected in all copies. If a portion of the
mirrored volume fails, the system continues to use the other copies of the data. RAID-5 provides
data redundancy by using parity. Parity is a calculated value used to reconstruct data, after a
failure. If a portion of a RAID-5 volume fails, the data that was on that portion of the failed volume
can be recreated from the remaining data and parity information. It is also possible to mix
concatenation and striping in the layout.
VxVM Interfaces
VxVM provides the following interfaces:
• Command-Line Interface
• Menu-driven vxdiskadm utility
• Veritas Enterprise Administrator
Command-Line Interface
As a superuser, you can administer and configure volumes and other VxVM objects using the
supported vx* commands.
Menu-driven utility
The vxdiskadm utility provides an easy to use menu driven interface for common high-level
operations on disks and disk groups.
Veritas Enterprise Administrator
The Veritas™ Enterprise Administrator (VEA) is the graphical user interface for administering disks,
volumes, and file systems on local and remote machines.
File Systems Supported on HP-UX 11i v3
Table 2 discusses the file systems that are supported on HP-UX 11i v3.
Table 2 Supported File Systems on HP-UX 11i v 3
DescriptionFile System Type
HFS is derived from the UNIX File System, the original BSD file system.Hierarchical File System (HFS)
The Veritas File System is an extent-based, intent logging file system from Symantec
Corporation.
Veritas File System (VxFS)
The CD file system enables you to read and write to compact disc media.Compact Disk File System
(CDFS)
AutoFS/Automounter mounts directories automatically when users or processes request
access to them. AutoFS also unmounts the directories automatically if they remain
idle for a specified period of time.
AutoFS
Network File System (NFS) provides transparent access to files on the network. An
NFS server makes a directory available to other hosts on the network by “sharing”
the directory.
Network File System (NFS)
The Cache File System (CacheFS) is a general purpose file system caching mechanism
that improves server performance and scalability by reducing server and network
load.
CacheFS
16 Introduction