User manual

iSCSI GbE to SAS/SATA II RAID Subsystem

User Manual

4.8 MPIO and MC/S

These features come from iSCSi initiator. They can be setup from iSCSI initiator to

establish redundant paths for sending I/O from the initiator to the target.

1. MPIO: In Microsoft Windows server base system, Microsoft MPIO driver allows

initiators to login multiple sessions to the same target and aggregate the duplicate

devices into a single device. Each session to the target can be established using

different NICs, network infrastructure and target ports. If one session fails, then

another session can continue processing I/O without interruption to the application.

2. MC/S: MC/S (Multiple Connections per Session) is a feature of iSCSI protocol,

which allows combining several connections inside a single session for performance

and failover purposes. In this way, I/O can be sent on any TCP/IP connection to the

target. If one connection fails, another connection can continue processing I/O

without interruption to the application.