Hd Mini-Sas Host Connection; Connecting Hosts: 5005/4005 Series Direct Attach - One Server/ One Hba/ Dual Path; Connecting Hosts: 5005/4005 Series Direct Attach - Two Servers/ One Hba Per Server/ Dual Path - Seagate RealStor 5005 Series Hardware Installation

lengths specified for 10GbE iSCSI above. In addition to providing host connection, these cables are used for connecting
two storage systems via a switch, to facilitate use of the optional replication feature.

HD mini-SAS host connection

To connect controller modules supporting HD mini-SAS host interface ports to a server HBA, using the controller's
SFF-8644 dual HD mini-SAS host ports, select a qualified HD mini-SAS cable option.
A qualified SFF-8644 to SFF-8644 cable option is used for connecting to a 12Gb/s enabled host; whereas a qualified
SFF-8644 to SFF-8088 cable option is used for connecting to a 6Gb/s host. Qualified SFF-8644 to SFF-8644 options
support cable lengths of 0.5 m (1.64'), 1 m (3.28'), 2 m (6.56'), and 4 m (13.12'). Qualified SFF-8644 to SFF-8088 options
support cable lengths of 1 m (3.28'), 2 m (6.56'), 3 m (9.84'), and 4 m (13.12').
Dual-controller configurations
Direct attach
A dual-controller configuration improves application availability because in the event of a controller failure, the affected
controller fails over to the partner controller with little interruption to data flow. A failed controller can be replaced
without the need to shut down the storage system. The 5005/4005 Series enclosures are configured with dual controller
modules.
NOTE: In the examples that follow, a single diagram represents CNC and SAS host connections for 5005 and 4005
respectively. The location and sizes of the host ports are very similar. Blue cables show controller A paths and green
cables show controller B paths for host connection.
Figure 31 Connecting hosts: 5005/4005 Series direct attach – one server/ one HBA/ dual path
Server 1
Figure 32 Connecting hosts: 5005/4005 Series direct attach – two servers/ one HBA per server/ dual path
Server
0A
0B
Controller enclosure
Controller enclosure
Host connection
0A
0B
Server 2
45