Galaxy GHDX4 RAID iSCSI-SAS/SATA InstaHardware Reference Manual
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Network Topologies
The iSCSI host ports connect to Ethernet network devices and iSCSI
initiators that comply with the IETF iSCSI standard (RFC 3720).
Network connection of the iSCSI ports is flexible. The use of network
connecting devices, subnet, Name Servers, or iSCSI management
software can vary from case to case. In the following sections,
configuration diagrams will be provided to illustrate the possible uses
of the Galaxy subsystem in an iSCSI network.
Note that host NIC ports and the storage system’s iSCSI host ports
must be configured into the same subnet. This is especially the case
for a dual-controller system where the IP addresses do not failover to
a partner controller in the event of a single controller failure. IPs
assigned to the partner RAID controllers must be in the same subnet.
The default IP addresses of the iSCSI ports is set to DHCP.
Contact your IT administrator or Rorke Tech support 800 328 8147
for configuration help and setup.
Points of Failure
The primary concern for configuring host-side topologies is to avoid
points of failure
. It is therefore preferred that two HBA cards are
installed on the host side and better not the onboard Ethernet. Data
flow and access management should therefore be implemented to
avoid access contention. Rorke’s RitePath software can be
implemented in order to access a RAID volume through an alternate
data link in the event of cabling failure.
Host Connection Topologies
Drawing Legends
A host computer or a client station.
An iSCSI initiator or NIC, either a single- or dual-ported
host adapter card.
RitePath
Instances of the RitePath multi-pathing driver to
encompass 2 or more fault-tolerant paths
A GbE network switch
A logical drive consisting of multiple physical drives
A logical volume made of one or several logical drives
(one recommended). For the DS series, you must
create logical volumes and logical partitions.
