Installation manual

Figure 4 shows the recommended path layout for a single host. This configuration provides both
failover and load-balancing capability.
Figure 4. Single host path layout
DMP
VERITAS DMP is supported on Windows, HP/UX, Solaris and Linux systems. DMP can coexist
with PowerPath, but no load balancing will be provided by DMP. To use DMP to a Dell/EMC CX
Series without PowerPath, a library must be loaded from the VERITAS website. The file is called:
CLR-ASL. The same file is found on the platform CD.
LUN presentation
By default, LUNs will be numbered on the host side in order of discovery. This means that in most
cases, they will be discovered in display order of the Storage Group. In environments that
change, the host LUN ID may change as LUNs are added and removed from a Storage Group.
Best practice is to keep the Storage Group as static as possible. This can be accomplished with
thorough design of the RAID group and LUN layout for each host brought into the environment.
The host LUN ID can also be forced with the –HLU switch in the NAVICLI or with Navisphere
Manager; however, this is the exception.
RAID group to back-end bus connections
Create the RAID groups within the same DAE. This will force all the members of a RAID group to
be on the same bus. Putting all the disks on the same bus simplifies the configuration. There is
Dell/EMC CX Series Initial Configuration
Best Practices Planning 28
Mirrored Cache
SP B
0 1 2 3
Mirrored Cache
SP A
0 1 2 3
Server
H
B
A
0
H
B
A
1