Technical data

Managing Storage Media
9.14 Using Interrupt Priority Level C (IPC)
The IPC program converts lowercase letters to uppercase, issues the terminal
bell character whenever it receives illegal characters (such as most control
characters), compresses multiple spaces, and ignores leading spaces.
How to Invoke IPC
1. On both OpenVMS VAX and Alpha systems, enter the following command
from the console terminal:
$
Ctrl/P
This command does not echo. Responses to this command will be
implementation-specific, which are indicated in the examples by ellipses
.
.
.
2. Enter subsequent commands specific to the hardware you are using:
• On VAX systems, enter the following commands:
>>> D/I 14 C
>>> CONT
IPC>
The first command tells the hardware to generate a software interrupt at
level C (#12).
• On Alpha systems, enter the following commands:
>>> D SIRR C
>>> CONT
IPC>
3. To exit from IPC, press Ctrl/Z:
IPC>
Ctrl/Z
9.14.1 Recalculating Quorum
You can enter the following commands at the console to recalculate quorum:
• On VAX systems:
>>> D/I 14 C
>>> CONT
IPC> Q
IPC>
Ctrl/Z
)
• On Alpha systems, enter the following commands:
>>> D SIRR C
>>> CONT
IPC> Q
IPC>
Ctrl/Z
)
Although IPC Q commands recalculate quorum in an OpenVMS Cluster, do not
use these commands. Instead, use either of the following to recalculate cluster
quorums:
• On OpenVMS VAX systems, DECamds
• On OpenVMS Alpha systems, the Availability Manager
9–78 Managing Storage Media