Metrocluster with Continuous Access XP P9000 for Linux Version B.01.00.00 Release Notes

Support for Remote Command Device
Metrocluster with Continuous Access XP P9000 for Linux includes support for remote command
device. A remote command device is a device to which a command device in a remote P9000
array is mapped. A remote array P9000 RAID Manager must be configured using the remote
command device. Using a remote array RAID manager instance, it is possible to get the status of
the device group on the remote P9000 array even when the remote hosts are inaccessible.
The remote command device can be configured using one of the following methods:
• Using the P9000 external storage feature
• Using an extended SAN
For more information on configuring remote array P9000 RAID Manager, see Building Disaster
Recovery Serviceguard Solutions Using Metrocluster with Continuous Access XP P9000 for Linux
available at http://www.hp.com/go/linux-serviceguard-docs.
Support for failover polices site_preferred and site_preferred_manual
Metrocluster for Linux supports Serviceguard failover policies site_preferred and
site_preferred_manual. These failover policies are supported for failover packages configured in
a Metrocluster with sites defined in the Serviceguard cluster configuration file.
For more information on site_preferred and site_preferred _manual failover polices, see Building
Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA P6000
for Linux B.01.00.00 available at http://www.hp.com/go/linux-serviceguard-docs .
NOTE: You must install the Metrocluster Add-ons for Linux RPM and Serviceguard for Linux
A.11.20.10 to use the site aware failover policies
Support for persistent reservations
Metrocluster for Linux supports configuring persistent reservations (PR) in Metrocluster packages to
control access to LUNs. For more information on persistent reservation, see Managing HP
Serviceguard A.11.20.10 for Linux available at http://www.hp.com/go/linux-serviceguard-docs.
NOTE: Starting from Serviceguard version A.11.20.10, the support for site_preferred and
site_preferred_manual failover policies and persistent reservations is available.
Support for Device Mapper
Metrocluster for Linux supports configuring Device Mapper for disks used in Metrocluster packages.
All the Serviceguard-related restrictions and guidelines for supporting DM-Multipath are also
applicable to Metrocluster configurations.
NOTE: Persistent Reservations cannot be used with Metrocluster Linux when Device Mapper (DM)
is enabled.
For more information on the restrictions, see HP Serviceguard for Linux Certification Matrix available
at http://www.hp.com/go/linux-serviceguard-docs.
Support for VMWare virtual machines as Metrocluster nodes
Metrocluster for Linux includes support for configuring VMWare virtual machines as Metrocluster
nodes. All Serviceguard related restrictions and guidelines for configuring VMWare virtual machines
as Serviceguard nodes are also applicable to Metrocluster configurations.
In Metrocluster configurations, Raw Device Mapping (RDM) is not supported. You must configure
the Fiber channel N-Port ID Virtualization (NPIV) for all the virtual machines. For more information
on configuring NPIV, see Using HP Serviceguard for Linux with VMWare virtual machines
whitepaper available at http://www.hp.com/go/linux-serviceguard-docs.
6 Metrocluster with Continuous Access XP P9000 for Linux Version B.01.00.00 Release Notes