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328 DS8000 Series: Concepts and Architecture
15.5.1 Device Manager
The Device Manager (DM) builds on the IBM Director technology. It uses the Service Level
Protocol
(SLP) to discover supported storage systems on the SAN. The SLP enables the
discovery and selection of generic services accessible through an IP network. The DM then
uses managed objects to manage these devices.
DM also provides a subset of configuration functions for the managed devices, primarily LUN
allocation and assignment. Its functionality includes aggregation and grouping of devices and
provides policy based actions across multiple storage devices. These services communicate
with the CIM Agents that are associated with the particular devices to perform the required
configuration. Devices that are not SMI-S compliant are not supported. The DM also interacts
and provides SAN management functionality when the IBM Tivoli SAN Manager is installed.
The DM health monitoring keeps you aware of hardware status changes in the discovered
storage devices. You can drill down to the status of the hardware device, if applicable. This
enables you to understand which components of a device are malfunctioning and causing an
error status for the device. Figure 15-3 shows an example of a DM view.
Figure 15-3 Sample Device Manager view
In summary, the Device Manager is responsible for:
Discovery of supported devices (SMI-S compliant)
Data collection (asset, availability, configuration)
Providing a topographical view of storage