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17-2 Dell PowerVault SAN Administrator’sGuide
2. In the Data Agent Configurator window, click the Devices menu and then click
Auto-Detect to 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
ThelastfieldinthedevicestringrepresentstheLUN,whichisLUN7inthis
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.