Chapter 6. TotalStorage DS300 sample configurations
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6.2 DS300 dual controller sample configurations
In this section we describe sample configurations for the DS300 dual controller
models.
6.2.1 DS300 dual controller single switch attachment
A server in this configuration has two interfaces (two hardware initiators or one
software initiator using two network interfaces teamed into one). Each of the
interfaces is connected to the same subnet.
With software initiators, outbound traffic is always sent out over the first port of
multiple ethernet NICs in the same subnet. However, inbound traffic can be
received over either port. Some operating systems are not able to send outbound
responses over the interface where inbound traffic was received. This can be
addressed by using teaming software. Ethernet interfaces for software initiators
must be teamed together using teaming software in Windows or ethernet
channel bonding in Linux. You must insure that the iSCSI session is established
over the virtual adapter and not the physical adapters.
Linux
IBM iSCSI Server Adapter or
QLogic iSCSI Expansion Card
for BladeCenter
spread logical drives across the
HBAs, no multipathing
Red Hat 3
iSCSI software initiator V3.6.3,
V3.6.4
multipathing using device mapper
or MCS possible, but not
supported by IBM
SLES 8
iSCSI software initiator V3.6.3,
V3.6.4
multipathing using device mapper
or MCS possible, but not
supported by IBM
Red Hat 4
embedded iSCSI software
initiator
multipathing using device mapper
or MCS possible, but not
supported by IBM
SLES 9
embedded iSCSI software
initiator
multipathing using device mapper
or MCS possible, but not
supported by IBM
a. Check driver readme files for detailed version numbers and service pack levels.
OS type
Initiator
a
Remarks
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