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Windows Server 2003 R2 Reviewer's Guide Microsoft Windows Server 2003 R2
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| bet | 37/53 | | Sana | 22.07.2021 | | Hajmi | 386 Kb. | | #15709 |
Support for multiple I/O paths. If a server supports Microsoft Multipath I/O (MPIO), Storage Manager for SANs can provide path failover by enabling multiple ports on the server for LUN I/O traffic. To prevent data loss in a Fibre Channel environment, make sure that the server supports MPIO before enabling multiple ports. (On an iSCSI subsystem, this is not needed: the Microsoft iSCSI initiator (version 2.0) that is installed on the server supports MPIO.)
Unlike on a Fibre Channel storage subsystem, LUNs on an iSCSI subsystem are not directly assigned to a server. For iSCSI, a LUN is assigned to a target – a logical entity that contains one or more LUNs. A server accesses the LUN by logging on to the target using the server’s iSCSI initiator. To log on to a target, the initiator connects to portals on the target; a subsystem has one or more portals, which are associated with targets. If a server’s initiator is logged on to a target, and a new LUN is assigned to the target, the server can immediately access the LUN.
Securing data on an iSCSI SAN. To help secure data transfers between the server and the subsystem, configure security for the login sessions between initiators and targets. Using Storage Manager for SANs, you can configure one-way or mutual Challenge Handshake Authentication Protocol (CHAP) authentication between the initiator and targets, and you can also configure Internet Protocol security (IPsec) data encryption.
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