66 IBM Midrange System Storage Hardware Guide
The default IP addresses for the controllers are shown in the Table 3-4. The default subnet
mask for all four Ethernet ports is 255.255.255.0.
Table 3-4 Default IP addresses for the controllers
Serial port
This serial port is used for management and diagnostic purposes. You can use a PC with
a terminal emulation utility, such as Hyper Terminal, to access the command set.
The maximum baud rate is 115,200 bps. The default baud rate setting from the factory is
38,400 bps, N-8-1, with no flow control.
3.5 DS5020 storage subsystem
The IBM System Storage DS5020 disk system, shown in Figure 3-40, is the newest midrange
disk storage offering from IBM. It is designed to deliver high performance, advanced
functionality, high availability, and modular and scalable storage capacity.
The DS5020 disk system is designed to deliver up to a two-fold IOP performance increase
over the current-generation DS4700 offerings and represents the eighth generation
architecture within the midrange disk family.
Figure 3-40 IBM System Storage DS5020 storage subsystem
DS5020 disk system members
DS5020 Disk Controller (1814-20A)
EXP520 Storage Expansion Unit (1814-52A)
Controller A Controller B
Port 1 192.168.128.101 192.168.128.102
Port 2 192.168.129.101 192.168.129.102
Attention: Managing the DS5000 storage subsystem through the serial interface has
potential risks. Using certain commands, you can initialize the RAID controller, and
therefore lose all your data. You should only use this interface when instructed to do so by
IBM Support.
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