HP XP Racks - Manual (Page 86)

XP7 Storage to the external system may time out. To keep the proper load, the following is
recommended.
◦ Specify two external paths. Set the paths to the ports of each controller of the AMS 2000
series system.
◦ Set the queue to 500 or fewer commands issued at the same time from a AMS 2000
series system. The formula to calculate the number of queue commands per system is as
follows.
(number of queues) x (number of external paths) x (number of
concurrent external volume commands) < 500
For more information about command queue settings, see “Editing external WWN settings
” (page 47) .
•
When using external volumes for replication, the copy operation needs to be distributed to
two or more RAID groups.
There is an upper bound to the number of pairs that can be used for initial copy or
resynchronization. Therefore, the copy operation may focus on a specific RAID group according
to the order of the operation when it is performed to two or more external volumes.
If the copy operation focuses on a specific RAID group, then the AMS 2000 drive could
bottleneck.
SVS200 storage system
Use the following settings on the external system:
•
The port must be set to the host group for the Windows hosts (host mode 0C: Windows, host
mode 2C: Windows Extension).
•
The port attribute must be set to Target port or RCU target port.
EVA storage system
Use the following settings on the external system:
•
The port must be configured as a target attached to a Windows host.
•
EVA storage systems with microcode version 4.000 or later can be connected as an external
system.
•
On the local HP XP7 Storage, set SOM 720 to ON for active path load-balancing support.
Set EVA system parameters in the following table. For parameters not shown, refer to the EVA
system documentation for connection parameters.
Parameter Setting Parameter
Windows Host OS Add a Host
The WWN of each HP XP7 Storage port connected to an EVA storage system must be registered
to the EVA system. See EVA storage system documentation for details on registering WWNs
Identifying logical volumes using Characteristic2
With an EVA external storage system, LUNs appear as Characteristic1 in Remote Web Console
windows.
If you search for the logical volumes by specifying the WWN for EVA Port A as illustrated in the
following figure, logical volumes LUN 1 and LUN 2 are found for each of HostGroup-1 and
HostGroup-2.
86 Supported external storage systems