Mapping External Volumes

Tags to map external volumes are:

•The AddVolumeSetting tag: Creates multiple LDEVs in an external volume by specifying the capacity

•The AddVolumeSetting2 tag: Creates one LDEV in an external volume without specifying the capacity

The version number that you write in a spreadsheet declaration differs depending on the tag you use. Write the appropriate version number for the tag you use (for details, see “Available Types and Operation Tags” (page 102)).

You can map external volumes to the local storage system by specifying a spreadsheet that includes one of these tags when you execute the CFLSET command using the CFL Extension.

Write parameters required for mapping external volumes in these tags. Parameters must be written in a hierarchical structure by using the + identifier. Table 19 (page 106) shows the structure and identifier of the parameters that can be set for these tags.

Table 19 Structure and Identifier of Parameters (AddVolumeSetting Tag and AddVolumeSetting2 Tag)

Layer

Identifier

Content

Description

First layer

None

Information about external

This layer is required.

 

 

volumes and the primary path

 

 

 

 

 

Second

+,

Information about alternate paths

Specifies one row for each alternate path. Up to seven

layer

 

 

rows can be specified. HP recommends that you specify

 

 

 

at least one alternate path.

 

 

 

 

Third layer

+,+,

Information about LDEVs

Specifies one row for each LDEV. Up to 2,048 rows can

 

 

 

be specified. If you do not specify the third layer, no

 

 

 

LDEVs will be created.

 

 

 

 

AddVolumeSetting Tag

Use the AddVolumeSetting tag to create multiple LDEVs in an external volume by specifying the LDEV capacity. The AddVolumeSetting tag allows you to specify the LDEV capacity in blocks so you can use this tag to create an LDEV with the predetermined capacity (an LDEV for creating a pair, for example).

Table 20 (page 107) shows the parameters that can be set for the AddVolumeSetting tag.

106 Using Spreadsheets for XP External Storage Operations