Silicon Graphics InfiniteStorage 4000 Series, Настройка и обслуживание

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Chapter 4: Configuring a Storage Array 51
4
Configuring a Storage Array
When you configure a storage array, you organize drives into a logical structure that
provides storage capacity and data protection so that one or more hosts can safely
store data in the storage array. You want to maximize the data availability by making
sure that the data is quickly accessible while maintaining the highest level of data
protection possible. The speed by which a host can access data is affected by these
items:

The redundant array of independent disks (RAID) level for the volume group

The settings for the segment size and the cache size

Whether the cache read prefetch capability is turned on or turned off
Data protection is determined by the RAID level, hardware redundancy (such as
global hot spares for volume group), and software redundancy (such as the
Synchronous Mirroring premium feature and the snapshot premium features).
The sections in this chapter show some, but not all, of the CLI wrapper commands
and the script commands. The commands in this chapter show how you can use the
commands to configure a storage array. These presentations do not describe all
possible usage and syntax for the commands. For complete definitions of the
commands, including syntax, parameters, and usage notes, refer to the
Command Line
Interface and Script Commands
.
NOTE
Many of these commands require a thorough understanding of the firmware as
well as an understanding of the network components that need to be mapped. Use the
CLI commands and the script commands with caution.
This chapter contains examples of CLI command usage and script command usage.
The command syntax that is used in the examples is for a host running a UNIX
operating system. As part of the examples, the complete
C:\
prompt and the path for
the commands are shown. Depending on your operating system, the prompt and path
construct will varies.
For most commands, the syntax is the same for all UNIX operating systems and
Windows operating systems, as well as for a script file. Windows operating systems,
however, have an additional requirement when entering names on a command line.
On Windows operating systems, you must enclose the name between two back
slashes (
\ \
) in addition to other delimiters. For example, the following name is used
in a command running under a Windows operating system:
[\”Engineering\”]
For a UNIX operating system, and when used in a script file, the name appears as
follows:
[“Engineering”]