Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access EVA A.05.01

NOTE: Before running the evadiscovery command, the management server configuration
must be completed using the smispasswd. Otherwise, the evadiscovery command, will fail.
Similarly, whenever new Management Servers are added or the existing Server credentials are
changed, generate and redistribute the map file to all Metrocluster clustered nodes.
Configuring volume groups
This section describes the required steps to create a volume group for use in a Metrocluster with
Continuous Access EVA environment.
To configure volume groups, you must first identify the device special files for the source and target
VDisks in the DR Group. After that, create volume groups for source volumes, export them for
access by other nodes and import them on all other cluster nodes.
Identify the device special files for Vdisk in DR group
To configure volume groups, you must get the device special files for the DR Group's source and
target VDisks on nodes in both the sites.
See the “ Identifying special device file name for Vdisk in DR group ” (page 89) for identifying
device filenames for Vdisks using Secure Path or PVLinks.
IMPORTANT: Native Multi-pathing can be used for multi-pathing with HP-UX 11i v3. On HP-UX
11iv3, it is no longer required nor recommended to configure PV links. With HP-UX 11i v3, Secure
Path is no longer supported
NOTE: While using Cluster Device Special Files (cDSF) feature, the device special file name is
same on all nodes for a source and target VDisk.
Identifying special device files for native multi-pathing
The mass storage stack in HP-UX 11i v3 provides native multi-pathing functionality, distributing
I/O requests transparently across all available lunpaths to the LUN. Use HP-UX native multi-pathing
for identifying special device files.
The following is the sample output of the evainfo command on HP-UX 11i v3 that uses agile
Device Special File (DSF) naming convention:
# evainfo -P -w <wwn>
Devicefile Array WWNN Capacity Controller/Port/Mode
/dev/rdisk/disk10 5000-1FE1-5007-DBA0 6005-08B4-0010-786B-0000-A000-02DB-0000
2048MB Ctl-A/FP-3/NonOptimized
For more information on using the evainfo tool, see HP P6000 Evainfo Release Notes. Use HP
P6000 Command View to identify the WWN for a Vdisk. The HP P6000 Command View for the
WWN Identifier of the Vdisk is shown in Figure 3.
Configuring volume groups 21