EMC DS-4900B - POST and Boot Process Specifications

POST and boot specifications
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DS-4900B Specifications
POST and boot specifications
The switch performs POST by default each time it is powered on or
rebooted or the system is reset. Boot time with POST is usually about
1 to 3 minutes.
POST can be skipped after subsequent reboots by entering the
fastBoot command. For more information about this command, see
the Fabric OS Command Reference Manual.
POST
The success/fail results of the diagnostic tests that run during POST
can be monitored through LED activity, the error log, or a command
line interface.
POST includes the following tasks:
1. Conduct preliminary POST diagnostics
2. Initialize the operating system
3. Initialize hardware
4. Run diagnostic tests on several functions, including circuitry, port
functionality, memory, statistics counters, and serialization
Boot
In addition to POST, boot includes the following tasks after POST is
complete:
1. Perform universal port configuration
2. Initialize links
3. Analyze fabric. If any ports are connected to other switches, the
switch participates in a fabric configuration
4. Obtain a domain ID and assigning port addresses
5. Construct unicast routing tables
6. Enable normal port operation