EonStor DS S12/S16/S24 Series Hardware Manual
NOTE
If you would like a LUN (a logical partition) to be accessed by multiple hosts, file
locking or multi-pathing access control will be necessary.
3.4
iSCSI-Host RAID Connections
Ethernet cable requirements:
Ethernet cables are user-supplied. Cat5e shielded STP type network cables or
better performance types (important for meeting the requirements imposed by
emission standards).
Straight-through Ethernet cables with RJ-45 plugs.
Use of cross-over cables can also be automatically detected and re-routed for a
valid connection.
Connection types:
Directly to iSCSI initiators (software or hardware) or via Gigabit Ethernet
switches.
To servers equipped with iSCSI HBA – preferably a hardware TOE (TCP/IP
Offload Engine) card, and then to client stations with an Ethernet NIC or iSCSI
HBA.
The system presents its logical volumes through SCSI-like IDs and LUNs. These
RAID volumes then appear as iSCSI targets through the network.
NOTE
Even though iSCSI initiator software is a cost-effective way of building an iSCSI
SAN, software initiator adds additional workload to the server CPU. It is
recommended to apply iSCSI HBAs that come with TCP/IP offload engines in order
to reduce overhead.
3.4.1
Network & Host Connection 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
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