Dell 650F, 651F manual Running Multiple Copies of Data Managed Node Data Agent in a SAN

2.In the Data Agent Configurator window, click the Devices menu and then click Auto-Detectto force the disk array to be discovered.

3.Modify the Device entries to point to the same LUN. For example, if the Device window contains the following lines:

\\.\SCSI2:0:0:0:0

\\.\SCSI3:0:0:1:1

Modify the lines as follows:

\\.\SCSI2:0:0:0:7

\\.\SCSI3:0:0:1:7

The last field in the device string represents the LUN, which is LUN 7 in this example. After a specific LUN is dedicated to the agent’s communication path, do not create another LUN with the same LUN ID.

Running Multiple Copies of Data Managed Node Data Agent in a SAN

SAN performance can be affected by the number of copies of Dell OpenManage Data Managed Node Data Agent that are running in a SAN. You should run one copy (or two for backup) in your SAN. If you run Data Managed Node Data Agent on all of the servers in the SAN that have PowerVault 650F, 651F, and 630F storage systems allocated to them, you will experience a significant performance degradation on your storage systems.

RAID Considerations for 650F and 651F Storage Systems

Although you are allowed to bind RAID 5 LUNs containing from three to sixteen hard- disk drives, performance for this type of RAID has been optimized for from five to nine hard-disk drives. Under some circumstances, more than nine hard-disk drives can degrade performance. To improve performance, you can reconfigure the number of hard-disk drives you bind to each LUN.

17-2 Dell PowerVault SAN Administrator’s Guide