IBM DS3500 User Manual

For a Fibre Channel attached host, attach a fibre channel cable to each HBA.
Continue with “Connecting Fibre Channel hosts to the DS3500” on page 64 to
connect the other end of each cable to the controller.
For an iSCSI attached host, attach an Ethernet cable to each host. Continue with
“Connecting iSCSI hosts to the DS3500” on page 70 to connect the other end of
each cable to the controller.
Connecting SAS hosts to the DS3500
The DS3500 can support up to 28 hosts when attached to the SAS Connectivity
Module for IBM BladeCenter
®
, and up to four hosts in a direct attached host
environment. The number of supported hosts depends on the number of host ports
installed on the controller. To protect against the loss of any one path from the host
servers to the DS3500 storage subsystem, use redundant host connections.
Note: In a single-controller storage subsystem, the DS3500 ships with four storage
partitions by default. For additional storage partitions, purchase an optional
Storage Partition Premium Feature upgrade. Contact your IBM reseller or
marketing representative for more information.
To connect a SAS host bus adapter (HBA) to the storage subsystem, complete the
following steps:
1. Connect a SAS cable from the controller host port to the SAS HBA that is in the
host. Figure 19 on page 33 shows the location of the host ports.
2. Create a redundant host connection:
v If the storage subsystem is a single-controller storage subsystem, connect a
SAS cable from the second SAS HBA to another host port on the controller.
You can create a maximum of one redundant host connection to a
single-controller storage subsystem.
v If the storage subsystem is a dual-controller storage subsystem, connect a
SAS cable from the second SAS HBA to a host port on the other controller.
You can create a maximum of three redundant host connections to a
dual-controller storage subsystem.
See “Direct-attached single-controller connections” on page 65 and “Direct-attached
dual-controller connections” on page 67 for illustrations of host connections.
Starting with controller firmware version 7.77.xx.xx and later, the DS3500 also
supports host connections via SAS switch. See “Single-controller and
dual-controller connections via SAS switch” on page 62 for illustrations of host
connections to the DS3500 SAS host port via SAS switch.
Note: For information about supported SAS switch models, SAS HBAs, and
operating-system version requirements for SAS switch connection environments,
see the interoperability matrix at http://www.ibm.com/systems/support/storage/
ssic/.
Direct-attached single-controller connections:
The following illustration shows a direct-attached SAS connection to a single host
HBA.
Chapter 3. Cabling the storage subsystem and storage enclosure 59

IBM DS3500 Specifications

General

Brand	IBM
Model	DS3500
Category	Storage
Language	English