Chapter 2. DS3000 introduction
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Draft Document for Review August 30, 2007 12:59 am
7065DS3KIntro.fm
Storage Manager Agent (SMagent)
SMagent is an optional component which is only required for in-band management. SMagent
is installed on the host server and allows the SMclient to communicate with DS3000 across
the I/O path. At the time of writing, only the FC I/O path is supported for management
communication, therefore only the DS3400 can be managed in-band.
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 on 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. 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 on the host server.
Multipath support
We recommend installing two HBAs in the host servers and to use the dual controller DS3000
subsystems. This provides higher availability through I/O path and controller redundancy.
However, dual path configurations will only work correctly if you install appropriate multipath
driver for your particular operating system on the host server.
DS3000 Storage Manager for Windows includes multipath support, based on the Microsoft
MPIO framework. This component is actually called
RDAC
in the DS3000 Storage Manager
installation utility, but be careful not to confuse this with the RDAC as we know it in the
DS4000 context. The DS4000 RDAC is a proprietary multipath solution, while the DS3000
“RDAC” conforms to the Microsoft MPIO specification.
DS3000 Storage Manager for Linux does not include any multipath support. RDAC for Linux
is available as a separate open source package, called MPP.
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.
2.3.2 Management methods
In this section, we discuss the two management methods in more detail, to help select which
is appropriate for your environment, since each method has some associated advantages, as
well as disadvantages. Both methods offer identical functionality - you can perform any
management task with either of these methods.
