IBM TotalStorage 2109 M12, Инструкция по установке и обслуживанию

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POST and Boot specifications
The M12 performs a POST by default each time that you power on (cold boot) or
restart or reset the chassis. You can restart the M12 with the switchreboot
command, the reboot command, or the fastboot command. The fastboot
command restarts the switches without running POST. If you restart the active CP
card, it fails over to the standby CP card.
Monitoring POST results
You can monitor the success and failure of the diagnostic tests that are run during
POST through LED activity, the error log, or a command line interface. POST
requires a minimum of 3 minutes to complete, however the time might vary
depending on the devices that are connected to the M12.
POST performs the following steps:
1. Runs preliminary POST diagnostics
2. Initializes the operating system
3. Initializes the hardware
4. Runs diagnostic tests on several functions, including circuitry, port functionality,
ability to send and receive frames, all aspects of memory, parity, statistics
counters, and serialization
Boot
Boot completes in a minimum of 3 minutes if you run a POST. In addition to POST,
boot includes the following steps after the POST completes:
1. Configures the universal port
2. Initializes the links
3. Analyzes the fabric. If any ports are connected to other switches, the switch
participates in a fabric configuration.
4. Obtains a domain ID for the switch and assigns port addresses
5. Constructs unicast routing tables
6. Enables normal port operation
Appendix A. Product specifications
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