nStor 4100FS, Руководство пользователя

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Chapter 2
Theory of Controller Operation
This chapter provides a functional overview and understanding of the supported
topologies and operating modes for the NexStor 4100FS Series Storage System.
With this information, you will be able to make the best choice based on the
supported topologies, to set up your storage solution.
There are three operating modes available for the NexStor 4100FS Series: Stand-
Alone, Active-Active, and Active-Passive. The NexStor 4110FS model with its single
RAID controller supports the Stand-Alone operating mode, and the NexStor
4120FS with its dual RAID controllers supports the active-active or active-passive
operating modes. Either mode can function in single or dual port configurations.
Operating Modes Overview
The operating modes let you configure the RAID controllers to support a variety
of host environments.
■
Stand-Alone Dual Port – Use this mode when you have a NexStor 4110FS
and require single-HBA host access.
■
Active-Active Single Port – Use this mode when you have a NexStor 4120FS
and require both controllers to be active and processing host I/O
operations. This operating mode uses one of the FC host ports of each
RAID controller and supports single or dual host system connections.
4100FS.book Page 19 Tuesday, July 8, 2003 4:35 PM