Dual-Controller Direct-Attached Sas Connections To Multiple Hbas In Multiple Hosts; Dual-Controller Ds3500 Or Single-Controller Ds3500 Sas Connection To Multiple Hosts Using One Sas Switch - IBM DS3500 Installation, User's, And Maintenance Manual

Host system
with dual host
adapters
DS3500
Figure 3-35. Dual-controller direct-attached SAS connections to multiple HBAs in multiple hosts
Single-controller and dual-controller connections via SAS switch:
The illustration Figure 3-36 shows the connections from the host server to the dual-controller or
single-controller DS3500 using one SAS switch. This figure also illustrates the use of the SAS switch to
allow the host server connected to multiple DS3500s.
Host system
with one SAS
host adapter
SAS switch
DS3500
with Dual-
controller
Figure 3-36. Dual-controller DS3500 or single-controller DS3500 SAS connection to multiple hosts using one SAS
switch
The illustration Figure 3-37 on page 3-33 shows the connections from the host server to the
dual-controller DS3500 using two SAS switches that are not connected together. Each switch forms its
3-32
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide
Host system
with dual host
adapters
Host system
with one SAS
host adapter
DS3500
with Single-
controller