HP D2D2502i User's Guide download pdf (Page 8)

2 Command Instruction Syntax

A StoreOnce appliance is controlled by operations. An operation is one or more of the following

events:

• Providing configuration information to the appliance

• Requesting an action

• Obtaining information about the appliance

The execution of operations is initiated by instructions. The instruction entry consists of three parts:

• The command sequence — up to four command elements representing groups of related

operations, actions, or subjects of the action. A command sequence is unique and there is a

defined syntax for every command sequence. The command sequence must be present in all

entries to define the instruction.

A typical command sequence consists of a command element defining the group of related

operations to which the given sequence belongs. This element is followed by a command

element describing the action of the operation. Then, depending on the operation, a third and

possibly fourth element may be included to describe the subject of the action. In some cases,

the command sequence may consist of only one command element describing the action of

the operation.

• Objects — represent an item associated with a StoreOnce appliance. It may be a physical

item, such as a network interface, or a virtual item, such as a virtual tape cartridge. Not all

instructions contain objects, but up to three is possible.

• Parameters — define additional conditions placed upon the operation. A parameter consists

of a word (or a series of words separated by dashes) followed by a colon; the characters

after the colon define the value of the parameter. Not all instructions contain parameters.

Table 2 A CLI Instruction

ParametersObjectsCommand Sequence

parameter:

value

objectobjectobjectcommand

(clarification)

command

(subject)

command

(action)

command

(group)

NOTE: Command entry is case insensitive; command words, objects, and parameters may be

entered in either upper or lower case.

The beginning elements of your entry are compared with the allowed command sequences. If there

is a direct match, this match defines the command syntax. If there is more than one direct match,

the match with the most number of elements is used. If a match does not exist, the help function is

performed to aid you in determining the correct entry.

Once the command sequence has been established, the entry is verified for correct syntax. If the

entry is correct, the operation is performed as defined. If there is a syntax violation, the help function

is performed to aid you in determining the correct entry.

The following convention is used when describing command entry syntax:

• The use of square parenthesis such as [Object] or [parameter] indicates the object or parameter

entry is optional

• The use of carat parenthesis such as <Object> or <parameter> indicates user entry is required

to define the object or parameter

• The use of special parenthesis such as {Object1 | Object2| …..} or {value1 | value2 | ……}

indicates a selection of one item is required among the items separated by the | character.

8 Command Instruction Syntax

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