HP Serviceguard for Linux Version A.11.19 Release Notes, April 2009

SCSI Primary Commands version 3 (SPC-3) standard, provide a means to register I/O
initiators and specify who can access LUN devices (anyone, all registrants, only one
registrant) and how (read-only, write-only).
Unlike exclusive activation for volume groups, which does not prevent unauthorized
access to the underlying LUNs, PR controls access at the LUN level. Registration and
reservation information is stored on the device and enforced by its firmware; this
information persists across device resets and system reboots.
PR requires the sg_persist command, which you may need to install separately
from your distribution source (for example the Linux installation CD), depending on
your platform and Linux distribution.
NOTE: PR imposes an important restriction on the use of VMware virtual machines
as cluster nodes; see “Support for HPVM and VMware ESX Server” (page 26).
For more information, see “About Persistent Reservations” in Chapter 3 of the latest
version of Managing Serviceguard for Linux.
About Serviceguard Manager
HP Serviceguard Manager B.02.00 is a web-based, HP System Management Homepage
(HP SMH) tool that replaces the functionality of the earlier Serviceguard management
tools. HP Serviceguard Manager allows you to monitor, administer and configure a
Serviceguard A.11.19 cluster from any system with a supported web browser.
The HP Serviceguard Manager Main Page provides you with a summary of the health
of the cluster including the status of each node and its packages.
For information on installing Serviceguard Manager, see “Installing Serviceguard
Manager for Linux ” (page 42). For information about known problems, see “Known
Problems” (page 62).
DSAU Integration
HP Serviceguard Manager uses Distributed Systems Administration Utilities (DSAU)
to display consolidated cluster log (syslog) and consolidated package logs. You can
learn more about DSAU from the Distributed Systems Administration Utilities User’s
Guide, available from http://docs.hp.com -> Network and Systems
Management -> System Administration.
What’s in this Release 19