Manual

Interfacing to SMM 4-1

Interfacing to SMM

4.1 In this Chapter

Topic Section

Overview

Command Outputs

Command Inputs

API Example

4.2

4.3

4.4

4.5

4.2 Overview

TSI provides a Tandem EMS subsystem for such purposes. In this regard, TSI will

assign a subsystem process name to licensed users and will in turn filter (EMS filter) for

messages from that subsystem. Unrecognized subsystems will have their messages

rejected.

A given third party will structure interprocess messages to this subsystem as described

below.

4.3 Command Outputs:

This section describes how to structure interprocess commands for use within the

Tandem Guardian operating system.

Table 4-1 Detail Command Byte Structure

Control Path

Command Device

Node

Device Name Label Drive Node Drive

Name

Reserved 1 Reserved 2 Reserved 3 Reserved 4 Error Code

2 10 10 8 10 10 20 10 6 40 2

4.3.1 Mount Media Command:

The Mount Media Command is used to mount the specified media, by media label to a

transport. A specific drive can be requested by including the Guardian name for the

Drive (example: $TAPE1) within the mount request. If no tape drive name is specified,

the tape label will be mounted in the first available drive, if any. Should there be no

drive available, the request will be placed in a queue. The structure of the Mount Media

Command, its arguments and an example are listed in Table 4-2.