Ethernet Management Cabling; Host Attachment; Dual Controller Ds3200 With Three Host Servers - IBM DS3000 Introduction And Implementation Manual

7065Cabling.fm

3.4 Ethernet management cabling

Each DS3000 RAID controller contains an Ethernet management port, which you can use for
out-of-band management. If you have a dual controller DS3000 subsystem, make sure the
management workstation can access the management port on each controller. If only one
controller is assessable by the management machine, the DS3000 Storage Manager will not
be able to manage the enclosure.
Do not use your public LAN for DS3000 out-of-band management. Instead, we strongly
recommend setting up a dedicated LAN or VLAN just for management purpose. This will
provide increased security of your DS3000 subsystem. If the DS3000 RAID controllers are on
a public LAN, a knowledgeable user could install the DS3000 Storage Manager on a
workstation, or use the CLI to run potentially destructive tasks. For an additional layer of
security, we also recommend that you enable password protection on the DS3000
subsystem. See 11.2.2, "Set or Change Password" on page 249 for how to do this.

3.5 Host attachment

In this section, we describe the host side connections between the DS3000 storage
subsystem and host servers. As the DS3000 product range supports different host
attachment technologies, we will have a look at each of these possibilities.
DS3200 - SAS
At the time of writing, the only supported SAS topology is direct attachment of host servers'
SAS HBAs to the DS3200 SAS ports. The DS3200 RAID controller can have up to three SAS
host ports, therefore you can connect up to three host servers, as shown in Figure 3-4.
Figure 3-4 Dual controller DS3200 with three host servers
In this scenario, each host server has two HBAs and each HBA is connected to a different
controller. This provides I/O path and controller redundancy.
36
IBM System Storage DS3000: Introduction and Implementation Guide
Draft Document for Review August 30, 2007 12:59 am
Host server 1
DS3200
Host server 2
Host server 3