
RAIDWatch User’s Manual
1.2.4.2 Mode Two: Stand-alone (on Host)
For configurations depending on the existing SCSI, iSCSI, or Fibre host
connection for RAIDWatch-to-RAID communications. Servers in DAS
(Direct Attached Storage) environments, SCSI host models for example,
require RAID agents for RAIDWatch commands to pass through and
communicate with RAID arrays. RAID agents are installed onto the servers
that are directly attached with a RAID subsystem.
1.2.4.3 Mode Three: Stand-alone (on Subsystems)
For remote and server-transparent management using an Ethernet
connection to EonStor subsystems or EonRAID controllers. The manager
program is installed on the RAID subsystem itself. The RAID subsystem
then uses a segregated disk space, called the “reserved space,” to store the
program files. The array is accessed by invoking a Java Applet on a web
browser that runs anywhere in the network.
NOTE:
RAID agents are embedded in the RAID subsystem firmware. When
subsystems are installed in Mode 2 or Mode 3, the management station
running in Mode 1 can manage the RAIDWatch components. This way,
multiple and/or distant arrays can be managed by a single management
station.
1.2.4.4 Access Requirements
Three (3) installation schemes for different access requirements are
discussed below.
NOTE:
The discussions below do not include all possibilities. RAIDWatch
supports various configurations and the combinations of machines
running components installed in any of the three different modes.
1. A RAID Server Chosen as the Centralized Management Station:
Applied in heterogeneous environments where multiple arrays are
serving different hosts/applications and scattered in distant locations.
Access management over the network is achieved through data
exchanges between a local or remote RAIDWatch Manager station
(can be a RAID server or not) and RAID agents that are installed on
the RAID servers or RAID subsystems themselves. The management
center and the RAIDWatch station can be two different machines.
A Root agent is installed on a computer chosen to be the
management center. Figure 0-4 shows a typical connection and
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