ADIC Scalar 100 User Manual page 111

1 — Basic Function
When set to the "Basic Function" level, the SNC periodically scans the system resources
to locate problems. Health Check status will be set if either of the following conditions is
true:
Temperature Sensors detect WARNING or ALARM status
Power Supply sensors detect a change in status since the last report.
2 — Interface Test
The "Interface Test" level includes the "Basic Function" Level Health Check plus an
Interface Health Check. It performs an active poll of the interface device, such as a Fibre
Channel or SCSI controller. The controller is queried in an interface-dependent method to
determine if it is currently functional. If a controller is not functional, a Health Check trap
will be sent indicating which interface failed.
Also enabled at the "Interface Test" level is a test of the Fibre Channel link status registers
(which monitor FC link errors). A trap will be sent if any change in these registers is
detected.
3 — Device Test
The "Device Test" level performs both the "Basic Function" level and "Interface Test"
level Health Checks plus a Device Health Check. It polls every attached device to
determine its status. A Device will be considered healthy if it responds to a simple SCSI
Inquiry command.
4 — Device Ready
The "Device Ready" test performs all test functions of the lower Health Check levels plus
a Device Functional Health Check. At this level, each target device is sent a SCSI Test
Unit Ready command when the interval expires. If the device reports "Good Status," it is
considered healthy. If it is not ready, the sense data from the device is interpreted to
determine if the device is in a "normal" not ready state, or if the device is in a failed state.
For removable media devices, such as tape drives, level 4 is treated the same as level 3.
If a device is determined to be in a "failed" state, an SNMP trap is issued.
After a successful health check, a Trap is generated.
page 97
Remote Events and Notifications