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Chapter 6. TotalStorage DS300 sample configurations
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6.2.2 DS300 dual controller switched dual path attachment
A server in this configuration has two interfaces (two hardware initiators or one
software initiator using two network interfaces). Each of the interfaces is
connected to a different subnet. Depending on the type of the initiator, it is
possible to use multipathing via operating system specific multipathing
mechanisms or multiple connections per session (MCS). Only with the software
initiators is multipathing possible. Even when multipathing is possible, it is not
always supported. Check support pages and firmware readme files about current
support status. With hardware initiators like IBM iSCSI Server Adapter or the
Qlogic iSCSI Expansion Card for IBM IBM
^
BladeCenter, multipathing is
not possible because at the time this redbook was written, no multipathing driver
was available.
Linux
IBM iSCSI Server Adapter or
QLogic iSCSI Expansion Card
for BladeCenter
place HBAs in same subnet,
spread logical drives across the
HBAs, no multipathing
Red Hat 3
iSCSI software initiator V3.6.3,
V3.6.4
use ethernet channel bonding
(failover mode)
SLES 8
iSCSI software initiator V3.6.3,
V3.6.4
use ethernet channel bonding
(failover mode)
Red Hat 4
embedded iSCSI software
initiator
use ethernet channel bonding
(failover mode)
SLES 9
embedded iSCSI software
initiator
use ethernet channel bonding
(failover mode)
a. Check driver readme files for detailed version numbers and service pack levels.
OS type
a
Initiator
Remarks
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