Remote I/O Mapping maps or redirects I/O requests destined for an LU on an HP 1000 node to an LU at a remote HP 1000 node. The node at which the mapped LU (or source LU) resides is known as the source node; I/O requests to the source LU are redirected to the destination LU at the destination node.

Using IOMAP

To set up a map to an LU at a destination node, you execute the program IOMAP at the source node. You must initialize NSARPA/1000 between the source and destination node before running IOMAP.

IOMAP can perform seven functions. These functions are summarized in Table 131, along with the runstrings.

Table 131. Remote I/O Mapping Runstrings

Function

Runstring

 

 

Initialize I/O Mapping

[RU,]IOMAP,mappableLU,–1

 

 

Establish a map using the

[RU,]IOMAP,–1,destLU,destNode,securityCode

first unused mappable LU

 

 

 

Establish/change a map

[RU,]IOMAP,sourceLU,destLU,destNode,securityCode

 

 

Disable map

[RU,]IOMAP,sourceLU,0, ,securityCode

 

 

Obtain information on

[RU,]IOMAP,sourceLU,–1

specific map

 

 

 

Obtain error values

[RU,]IOMAP,–2

 

 

Obtain mapping

[RU,]IOMAP,sourceLU,–2

information

 

 

 

Caution

There is no protection against reassigning a map that is in use.

 

You should establish a map by allowing IOMAP to select the

 

first unused mappable LU. You should also clear maps after you

 

have used them.

 

 

Remote I/O Mapping 131