Table 4–9 I/O Expansion Module Deconfiguration Actions
Action Taken
Description
I/O hard reset
The I/O expansion module which is being deconfigured is reset
through the cross-link I/O hard reset register.
Set I/O expansion
module LED
indicator
The module I2C bus is used to turn on the LED for the failed
module.
Set module status
in I/O expansion
module NVRAM
and DCB
The status_os and status_sum fields in the module ID NVRAM and
DCB are updated to indicate the module has experienced a failure.
The actual code written depends on the failure type.
The entries in Table 4–9 apply when the module is being removed due to a
solid error or excessive transient errors. There is one exception. When an I/O
expansion module in a Simplex system experiences excessive transient errors, the
module is not fully deconfigured since that would likely result in the loss of the
only I/O path to a device. In this case, the I/O expansion module LED is turned
on and the module status is written to the interface module NVRAM and the
DCB.
The I/O expansion module will remain in service. The NVRAM will not be
configured when the system is booted or when the failed zone synchronized until
the module is repaired.
4.3.2.4 Interface Module
Table 4–10 describes the OpenVMS operating system actions taken when an
interface module is identified as the FRU and is deconfigured by the OpenVMS
operating system. Some actions are dependent on the system operating mode.
Table 4–10 Interface Module Deconfiguration Actions
Action Taken
Description
Reset interface module
The interface module being deconfigured is reset through the
module I2C bus.
Set interface module
LED indicator
Use the module I2C bus to turn on the LED indicator for the
failed interface module.
Set module status
in interface module
NVRAM
Update the status_os and status_sum fields in the module ID
NVRAM and the DCB to indicate the module has failed. The
code written depends on the failure type.
The entries in Table 4–10 apply when the module is being removed because of
a solid error or excessive transient errors. There is one exception. When an
interface module in a Simplex system experiences excessive transient errors, the
module is not fully deconfigured since that would likely result in the loss of the
only I/O path to a device. In this case, the interface module LED indicator is
turned on, and the module status is written to the interface module NVRAM and
the DCB (See Section 4.8.2).
The interface module will remain in service. The module will not be configured
when the system is booted or when the failed zone is synchronized until the
module is repaired.
Error Handling and Analysis 4–15
