Chapter 3: Connecting Hosts
Connect the Chassis to Hosts
QX and QXS Setup Guide 99
10GbE iSCSI Host Connection
To connect to the QXS-3, QXS-4, and QXS-6 Series storage RAID chassis supporting 10GbE iSCSI host
interface ports to a server HBA or switch—using the controller’s CNC ports—select a qualified 10GbE SFP
option.
Qualified options support cable lengths of 0.5 m (1.64'), 1 m (3.28'), 3 m (9.84'), 5 m (16.40'), and 7 m
(22.97') for copper cables; and cable lengths of 0.65 m (2.13'), 1 m (3.28'), 1.2 m (3.94'), 3 m (9.84'), 5 m
(16.40'), and 7 m (22.97') for direct attach copper (DAC) cables. In addition to providing host connection,
these cables are used for connecting a local storage system to a remote storage system via a switch, to
facilitate use of the optional replication feature.
1GbE iSCSI Host Connection
To connect to the QXS-3, QXS-4, and QXS-6 Series storage RAID chassis supporting 1Gb iSCSI host
interface ports to a server HBA or switch—using the controller’s CNC ports—select a qualified 1 Gb RJ-45
copper SFP option supporting (CAT5-E minimum) Ethernet cables of the same lengths specified for 10GbE
iSCSI above.
In addition to providing host connection, these cables are used for connecting a local storage system to a
remote storage system via a switch, to facilitate use of the optional AssuredRemote replication feature.
HD mini-SAS Host Connection
To connect to the QXS-3, QXS-4, and QXS-6 Series storage RAID chassis supporting HD mini-SAS host
interface ports to a server HBA or switch—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 12 Gbit/s enabled host; whereas
a qualified SFF-8644 to SFF-8088 cable option is used for connecting to a 6 Gbit/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').
Note:Supported qualified cable options for host connection are subject to change.
Dual-controller Configurations
Caution:All QXS Storage configurations are dual-controller. Single-controller support is provided only
when a controller fails over to its partner controller. A controller module must be installed in each IOM
slot to ensure sufficient airflow through the chassis during operation.
Dual-controller configurations improve 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.
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