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

/dev/dsk/c10t0d1 Active
/dev/dsk/c16t0d1 Active
/dev/dsk/c22t0d1 Active
=================================================================
Lun WWN : 6005-08B4-0010-0E01-0001-B000-028E-0000
Load Balancing Policy : No Load Balancing
=================================================================
Device Path Status
=================================================================
/dev/dsk/c3t0d2 Active
/dev/dsk/c9t0d2 Active
/dev/dsk/c15t0d2 Active
/dev/dsk/c21t0d2 Active
/dev/dsk/c4t0d2 Active
/dev/dsk/c10t0d2 Active
/dev/dsk/c16t0d2 Active
/dev/dsk/c22t0d2 Active
From the output display identify the device file listing that corresponds with the WWN of the vdisk
in the DR group.
In the above sample listing there are eight device files that correspond to different paths of the
same Vdisk.
Using PVlinks
LVM PVlink feature can be used to handle path failovers to a storage device. The following describes
how to identify device files for a Vdisk using PVlinks. Use the RSM HV Mapper Tool or the HP
EVAInfo tool to display the special device files that correspond to the WWN of the vdisk in the DR
group.
For RSM HV Mapper Tool
# RSM_HV_Mapper.pl
Collecting Host Volume info might take time. Please wait.
Collecting Host Volume info from <nodename1>.
Collecting Host Volume info from <nodename2>.
Collecting Host Volume info from <nodename3>.
Collecting Host Volume info from <nodename4>.
Collecting Host Volume data done.
See HostVolTable.txt for results.
The HostVolTable.txt output file provides a mapping of the devices file to vdisks for all the hosts
that are RSM enabled. In addition, the tool displays the WWID of the vdisk and the storage system
to which the vdisk belongs.
In the following sample listing there are eight device files that correspond to different paths of the
same vdisk.
======================= <nodename1>
=======================
Virtual Disk Name..: \\XL-1\Vdisk001-DRGSynDCN
Disk...............: /dev/dsk/c16t0d1
Disk...............: /dev/dsk/c17t0d1
Disk...............: /dev/dsk/c18t0d1
Disk...............: /dev/dsk/c20t0d1
Disk...............: /dev/dsk/c12t0d1
Disk...............: /dev/dsk/c13t0d1
Disk...............: /dev/dsk/c14t0d1
Disk...............: /dev/dsk/c15t0d1
90 Identifying special device file name for Vdisk in DR group