Host Ports And The Type Of Host Interfaces - IBM System Storage DS3000 Programming Manual

Controller models DS4400 and DS4500 use minihubs; two connected to each controller. When viewed
from the rear of the controller module, the host-side minihubs are numbered from left-to-right a1, b1, a2,
b2. The script commands identify the host channels by using these identifiers. Minihubs also supported
the drive-side, where each minihub represents a single channel to the disk drives. When viewed from the
rear of the controller module, the disk drive minihubs are numbered from left to right 4, 3, 2, 1. The
script commands use these numbers to identify the disk drive channels.
Controllers manage the interface by using the controller firmware to transmit and receive commands
between the hosts and the disk drives. Host bus adapters facilitate the communication through whatever
interface is selected. Typically, two host bus adapters and two paths are used to optimize redundancy.
These controller modules and controller modules incorporate all host connections and expansion drawer
connections into each controller. The host ports must be identified in your command statements to let
you complete their network configurations.
The more recent controllers do not use minihubs. These controllers have host ports that are integrated
into the controller circuit boards or auxiliary circuit boards that are directly connected to the controller
circuit boards.
The following table lists the controller modules that do not use minihubs, the type of host port, and the
number of host ports.
Table 4-1. Host Ports and the Type of Host Interfaces on Controller Modules
Model
DS3200 controller module (without optional SAS expansion card)
DS3200 controller module (with optional SAS expansion card)
DS3300 controller module
DS3400 controller module
DS3500 series controller module
DCS3700 series controller module
DCS3700 storage subsystem with Performance Module Controllers controller
module
DS3950
DS4100, DS4200, and DS4300
DS4700 (model 70) controller module
DS4700 (model 72) controller module
DS4400, DS4500, and DS4800
DS5020
DS5100 and DS5300
1
iSCSI will be supported in a future update.
Available
Host Ports
Per Type of Host
Controller Interface
1 SAS
3 SAS
2 iSCSI
2 Fibre Channel
up to 6 Fibre Channel,
SAS, or iSCSI
up to 6 Fibre Channel,
SAS, iSCSI
up to 8 Fibre Channel
4 Fibre Channel and
iSCSI
2 Fibre Channel
2 Fibre Channel
4 Fibre Channel
4 Fibre Channel
4 Fibre Channel and
iSCSI
up to 8 Fibre Channel and
iSCSI
Chapter 4. Configuring a Storage Subsystem
1
4-3