> # On-Board Failure Logging

> The Generation 2 Fibre Channel switching modules provide the facility to log failure data to persistent storage, which can be retrieved and displayed for analysis. This on-board failure logging (OBFL) feature stores failure and environmental information in nonvolatile memory on the module. The information will help in post-mortem analysis of failed cards.

> OBFL data is stored in the existing CompactFlash on the module. OBFL uses the persistent logging (PLOG) facility available in the module firmware to store data in the CompactFlash. It also provides the mechanism to retrieve the stored data.

> The data stored by the OBFL facility includes the following:

> - Time of initial power-on
> - Slot number of the card in the chassis
> - Initial temperature of the card
> - Firmware, BIOS, FPGA, and ASIC versions
> - Serial number of the card
> - Stack trace for crashes
> - CPU hog information
> - Memory leak information
> - Software error messages
> - Hardware exception logs
> - Environmental history
> - OBFL specific history information
> - ASIC interrupt and error statistics history
> - ASIC register dumps

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