Start dynamic I/O configuration change
Component: | BS2000 |
Functional area: | Device management |
Domain: | DEVICE |
Privileges: | OPERATING |
Routing code: | G |
Function
Systems support staff can initialize a dynamic I/O configuration change for systems of SU /390 with the aid of the START-CONFIGURATION-UPDATE command. Once the reconfiguration has been started successfully, systems support staff can change the input/output configuration dynamically using the ADD-IO-UNIT, REMOVE-IO-UNIT and MODIFY-IO-UNIT commands. The modifications are made in the active IORSF (Input/Output Resource File), i.e. they take immediate effect.
Dynamic I/O configuration change is concluded again with the STOP-CONFIGURATION-UPDATE command.
Exception
If only the timeout settings for the devices or the PAV settings are to be modified the MODIFY-IO-UNIT command (TIMEOUT operand) can be entered outside a dynamic I/O configuration change (i.e. regardless of the system type).
Dynamic I/O configuration change VM2000
Under VM2000, the dynamic I/O configuration change commands can only be entered at the monitor system. The relevant modifications in the input/output tables are carried out automatically in the active guest systems that support dynamic I/O configuration change.
When the START-CONFIGURATION-UPDATE command is entered, message NKR0178 shows how many guest systems are active and how many of them support dynamic I/O configuration change. If guest systems are active that do not support dynamic I/O configuration change, the VM administrator must make sure that the modifications made to the configuration will not damage them.
Format
START-CONFIGURATION-UPDATE |
Return codes
(SC2) | SC1 | Maincode | Meaning |
|---|---|---|---|
0 | CMD0001 | No error | |
1 | NKR0006 | Syntax error | |
64 | CMD0216 | User is not authorized | |
1 | 64 | NKR0169 | System error |
3 | 64 | NKR0169 | Dynamic I/O configuration change was rejected |
4 | 64 | NKR0169 | Dynamic I/O configuration change is not supported |
13 | 64 | NKR0169 | Configuration change already active |
14 | 64 | NKR0169 | Configuration change not performed by the guest system |