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 | |
|
|
Establish a map using the | |
first unused mappable LU |
|
|
|
Establish/change a map | [RU,]IOMAP,sourceLU,destLU,destNode,securityCode |
|
|
Disable map | [RU,]IOMAP,sourceLU,0, ,securityCode |
|
|
Obtain information on | |
specific map |
|
|
|
Obtain error values | |
|
|
Obtain mapping | |
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