Array Controller Configuration Commands; Setting Global Variables - HP StorageWorks Modular Smart Array 1000 cs User Manual

Using the CLI

Array controller configuration commands

The CLI provides the ability to configure the MSA1000 controller, including:
Each of these procedures uses the SET command, which changes the settings of
the MSA1000 Controller.

Setting global variables

A single command with a variety of parameters is used to set the expand priority,
the read/write ratio, and the system name.
Basic command
Example command
Command options
32
Setting global variables
Setting the controller ID
Setting hard addressing
Changing the CLI prompt
SET GLOBALS
SET GLOBALS EXPAND_PRIORITY=HIGH REBUILD_PRIORITY=HIGH
SYSTEM_NAME="XXX" READ_CACHE=50 WRITE_CACHE=50
EXPAND_PRIORITY=HIGH
to set the priority of array expansions in relation to input/output operations.
See below for detailed information about these settings.
REBUILD_PRIORITY=HIGH
array to set the priority of an array rebuild in relation to input/output
operations.
Low—expansion or rebuild takes place only when the array controller is
not busy handling normal I/O requests. This setting has minimal effect on
normal I/O operations. However, there is an increased risk that data will
be lost if another physical drive fails while the rebuild is in progress.
Medium—expansion or rebuild occurs for half of the time, and normal
I/O requests are handled during the rest of the time.
High—rebuild or expansion occurs at the expense of normal I/O
operations. Although system performance is affected, this setting provides
better data protection because the array is vulnerable to additional drive
failures for a shorter time.
Modular Smart Array 1000/1500 cs Command Line Interface User Guide
—the expand priority. Used when expanding an array
—the rebuild priority. Used when rebuilding an