VERITAS Volume Manager 3.5 Installation Guide (September 2004)

Before You Start

Installation and Upgrade Requirements

Chapter 1

• VERITAS Volume Manager Service Provider (VRTSvmpro)

• VERITAS File System Service Provider (VRTSfspro)

NOTE All these packages are dependent on one another, and all must be present on the server for VEA to

run. Furthermore, VRTSob must already be installed before you can install VRTSvmpro. Once

installed, you cannot remove VRTSob before removing (deinstalling) VRTSvmpro.

These packages are installed by default when installing HP-UX 11i v2 , or when upgrading to HP-UX

11i v2.

VEA Requirements

For a machine to be administered by VEA, the following software must be installed and running:

• VEA server (must run under HP-UX 11i v2). See “Installing the VEA Server and Client on

HP-UX” on page 29 on how to install the server.

• VxVM Release 3.5. The vxconfigd and vxsvc daemons must be running on the machine to be

administered.

Cluster Environment Requirements

If your configuration has a cluster, which is a set of hosts that share a set of disks, follow these steps:

Step 1. Obtain a license for the optional Volume Manager cluster feature from your Customer Support

channel.

Step 2. Decide where to place the rootdg disk group for each node in the cluster. A system using Volume

Manager has one or more disk groups, including the rootdg. The rootdg must exist, and it cannot be

shared between systems. At least one disk must exist within the rootdg while Volume Manager is

running.

Step 3. Decide on the layout of shared disk groups. There may be one or more shared disk groups. Determine

how many you wish to use.

Step 4. If you plan to use Dirty Region Logging (DRL) with Volume Manager in a cluster, leave a small

amount of space on the disk for these logs. The log size is proportional to the volume size and the

number of nodes. Each log has one recovery map plus one active map per node.

For a two-gigabyte volume in a two-node cluster, a log size of three blocks (one block per map) is

sufficient. For every additional two gigabytes of volume size, the log size increases by approximately

one block per map (for example, a four-gigabyte volume with two nodes has a log size of six blocks)

up to a maximum of 96 blocks. For larger volumes, DRL changes the log granularity to accommodate

the increased size without exceeding the maximum log size. A four-node cluster requires larger logs.

Step 5. Refer to the VERITAS Volume Manager Administrator’s Guide for more information on DRL.

Check the Operating System Environment

This release of Volume Manager can only be installed on an HP-UX system running the HP-UX 11i v2

operating system. Installation of VxVM does not occur if the system is not up to this release level. For

example, installation is not possible on HP-UX 11.0 or HP-UX 11.11i. VxVM 3.5 supports 64-bit

HP-UX 11i v2.