
■Any CPU failed
■All logical memory banks failed
■Flash RAM cyclical redundancy check (CRC) failure
■Critical
■Critical
4.5Automatic System Recovery
Automatic system recovery (ASR) consists of
If a component is monitored by ASR and the server is capable of operating without it, the server automatically reboots if that component develops a fault or fails. This capability prevents a faulty hardware component from stopping operation of the entire system or causing the system to fail repeatedly.
If a fault is detected during the
To support this degraded boot capability, the OpenBoot firmware uses the 1275 client interface (by means of the device tree) to mark a device as either failed or disabled, creating an appropriate status property in the device tree node. The Solaris OS does not activate a driver for any subsystem marked in this way.
As long as a failed component is electrically dormant (not causing random bus errors or signal noise, for example), the system reboots automatically and resumes operation while a service call is made.
Once a failed or disabled device is replaced with a new one, the OpenBoot firmware automatically modifies the status of the device upon reboot.
Note – ASR is not enabled until you activate it (see Section 4.5.1.1, “To Enable Automatic System Recovery” on page