Ds5100 And Ds5300 Storage Subsystem Additional Connections - IBM Midrange System DS4000 Series Hardware Manual

Note: Make sure that when you mix different speed EXPs that both disk ports in a disk
channel operate at the same speed. If you attach a disk enclosure that operates at 2 Gbps,
both ports in the controller's disk channel and all drives will work at 2 Gbps.
Remember to connect a 2 Gbps and 4 Gbps enclosure to different channels, as shown in
Figure 3-39 on page 65.
Figure 3-39 Example of a mixed drive-side environment (2 or 4 Gbps)
Additional materials regarding cabling can be found in the IBM System Storage
DS4000/DS5000 Hard Drive and Storage Expansion Enclosure Installation and Migration
Guide, GC53-1139.

3.4.10 DS5100 and DS5300 storage subsystem additional connections

In addition to host and drive connections, the DS5000 storage subsystem's rear also has
connections for Ethernet and serial ports. You can manage and service the DS5000 storage
subsystem through these ports. The ports are:
RJ-45 Ethernet connector
This connector is for an RJ-45 10/100/1000BASE-Tx Ethernet connection. There are two
connections per controller. One port is designed for out-of-band management and the
other port is meant for serviceability. The logic behind adding an extra port was to
introduce additional isolation and to separate management and service traffic from one
another. Because of the extra port, it is preferable to have two IP addresses per controller
in order to manage and service the DS5000 storage subsystem appropriately. However,
you cannot attach this port to a routed network, because you can not set up a gateway for
it. You can still operate the DS5000 storage subsystem with only one IP port active per
controller. The best practice is to set Port 1 into customer network for out-of-band
management and leave the Port 2 as the default in order to let IBM service personnel
connect using the default IP addresses.
4Gbps Drive Channel Pair
Chapter 3. IBM System Storage DS4000 and DS5000 hardware
2Gbps Drive Channel Pair
65