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Installation
20
DataDirect Networks S2A 9550 User Guide
Up to 128 LUNs can be created in total. Each LUN can be subdivided into up to 64 smaller
equally-sized LUN segments, giving a total of 8192 LUN segments. The LUN segments of
a LUN are managed together and share the same characteristics. LUNs (and LUN
segments) can be shared or dedicated to individual user, according to your security level
setup with Read or Read/Write privileges granted per user. The users only have access to
“their own” and “allowed to share” LUNs. Shared LUNs need to be managed by SAN
management software. Individual dedicated LUNs appear to the users as local storage
and do not require external management software.
NOTE : In dual mode, LUNs are “owned” by the S2A9550 unit via which they are created.
Hosts only see the LUNs on the S2A9550 that they are connected to, unless cache coherency
is enabled.
In general, for random I/O applications, use as many tiers as possible and create one or
more LUNs. For applications that employ sequential I/O, use individual or small grouping
of tiers. If you need guidance in determining your requirements, please contact
DataDirect Networks Technical Support.
2.3.2 Configuration Options
There are two options to configure the S2A9550 system:
• Command Line Interface (CLI)
• S2A Management Tool which is a JAVA-based GUI RAID client-server application
manager that provides a user-friendly graphical user interface (GUI)
This user guide provides information for set up using the CLI. If you want to configure the
S2A9550 using the Management Tool, please refer to the S2A Management Tool User
Guide . Configuration examples are given for both options.
2.3.3 Accessing the Administrative Utility
The S2A9550 can be configured locally via any RS-232 terminal or terminal emulator
(such as Windows Hyperterminal). You need the Administrator access in order to do the
configuration.
You may also configure the
S2A9550
remotely, via Telnet. Please refer to Section 3.9 for
information on how to set up the
S2A9550
for remote management and configuration.
Connect your terminal to the CLI port at the back of the S2A9550 using a standard DB-9
female-to-male Null Modem cable
(Figure 2-5)
.
Then bring up your terminal window and use the following settings for your serial port:
Bits per second: 115,200
Data bits: 8
Figure 2-5 CLI Port on the S2A9550
RS-232 Interface