IBM System Storage DS3500 Introduction And Implementation Manual page 52

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Storage Manager Agent (SMagent)
SMagent is an optional component that is only required for in-band management. SMagent is
installed in the host server and allows the SMclient to communicate with DS3500 across the
I/O path. At the time of writing, only the FC I/O path is supported for management
communication.
Storage Manager Utility (SMutil)
The Storage Manager Utility package contains the following components:
Hot-add utility
You can use this utility to dynamically add newly created logical drives to the operating
system running in the host without having to reboot the host server. This utility is available
for Windows only.
SMdevices utility
This utility can be used to associate logical drives to device names in the operating
system. It is installed with both the Windows and Linux package.
SMrepassist utility
SMrepassist is a Windows utility used with FlashCopy and VolumeCopy. The utility allows
you to flush cached data prior to creating a FlashCopy/VolumeCopy image. In other
operating systems, you need to unmount the file system. SMrepassist does not exist in the
Linux package.
SMutil is a required package in the host server for ease of troubleshooting and problem
analysis. With these utilities there are may quick changes that can be implemented as well as
a great deal of detail on the current configuration settings and their impacts.
Multipath driver support
We recommend installing two HBAs in the host servers and using the dual controller DS3500
subsystems. This provides the ability to create completely redundant paths to the host
server's storage therefore improving the availability through multiple I/O paths to the
controllers and full storage redundancy out the backend to the disks. However, host dual path
configurations can only work properly if you install the appropriate multipath driver for your
particular operating system into the host server.
The IBM System Storage DS Storage Manager Software and Host Kit for Windows includes
multipath support, based on the Microsoft MPIO framework. The IBM System Storage DS
Storage Manager Software and Host Kit for Linux does not include any multipath support.
RDAC for Linux is available as a separate open source package called MPP. For Solaris there
is a version of DMP which can be implemented for multi-path support. And in AIX there is an
MPIO driver that is available to support the DS family of storage subsystems. All of these
drivers require special configurations and setups to be followed when implementing them and
desiring them to function in the expected manner. A simple parameter setting can be the
difference between a successful failover to an alternate path, and an application outage.
Java Access Bridge
This is included in the Windows Storage Manager package only. Java Access Bridge for
Microsoft Windows makes it possible for Windows based assistive technology to access and
interact with the application.
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IBM System Storage DS3500: Introduction and Implementation Guide
Draft Document for Review March 28, 2011 12:24 pm