Configuring with veritas volume manager – HP EVA P6000 Storage User Manual
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Configuring with Veritas Volume Manager
The Dynamic Multipathing (DMP) feature of Veritas Volume Manager (VxVM) can be used for all
FCAs and all drivers. EVA disk arrays are certified for VxVM support. When you install FCAs,
ensure that the driver parameters are set correctly. Failure to do so can result in a loss of path
failover in DMP. For information about setting FCA parameters, see
Oracle SAN driver stack” (page 62)
and the FCA manufacturer’s instructions.
The DMP feature requires an Array Support Library (ASL) and an Array Policy Module (APM). The
ASL/APM enables Asymmetric Logical Unit Access (ALUA). LUNs are accessed through the primary
controller. After enablement, use the vxdisk list <device> command to determine the
primary and secondary paths. For VxVM 4.1 (MP1 or later), you must download the ASL/APM
from the Symantec/Veritas support site for installation on the host. This download and installation
is not required for VxVM 5.0 or later.
To download and install the ASL/APM from the Symantec/Veritas support website:
1.
Go to
2.
Enter Storage Foundation for UNIX/Linux in the Product Lookup box.
3.
Enter EVA in the Enter keywords or phrase box, and then click the search symbol.
4.
To further narrow the search, select Solaris in the Platform box and search again.
5.
Read TechNotes and follow the instructions to download and install the ASL/APM.
6.
Run vxdctl enable to notify VxVM of the changes.
7.
Verify the configuration of VxVM as shown in
Example 3 “Verifying the VxVM configuration”
(the output may be slightly different depending on your VxVM version and the array
configuration).
Example 3 Verifying the VxVM configuration
# vxddladm listsupport all | grep HP
libvxhpevale.so HP HSV200, HSV210
# vxddladm listsupport libname=libvxhpevale.so
ATTR_NAME ATTR_VALUE
=======================================================================
LIBNAME libvxhpevale.so
VID HP
PID HSV200, HSV210
ARRAY_TYPE A/A-A-HP
ARRAY_NAME EVA4K6K, EVA8000
# vxdmpadm listapm all | grep HP
dmphpalua dmphpalua 1 A/A-A-HP Active
# vxdmpadm listapm dmphpalua
Filename: dmphpalua
APM name: dmphpalua
APM version: 1
Feature: VxVM
VxVM version: 41
Array Types Supported: A/A-A-HP
Depending Array Types: A/A-A
State: Active
# vxdmpadm listenclosure all
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE
============================================================================
Disk Disk DISKS CONNECTED Disk
EVA81000 EVA8100 50001FE1002709E0 CONNECTED A/A-A-HP
By default, the EVA I/O policy is set to Round-Robin. For VxVM 4.1 MP1, only one path is used
for the I/Os with this policy. Therefore, HP recommends that you change the I/O policy to
Adaptive
in order to use all paths to the LUN on the primary controller.
shows the commands you can use to check and change the I/O policy.
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Configuring application servers