HP IO Accelerator ESXi/ESX user guide

Monitoring IO Accelerator health 40
Lifetime data volumes:
Physical bytes written: 6,423,563,326,064
Physical bytes read : 5,509,006,756,312
Flashback substitution events
The IO Accelerator is equipped with Flashback substitution capability. This capability allows for predictive
NAND flash failures to occur and keep the IO Accelerator functioning by substituting out bad locations or
even a whole NAND chip. The output of the fio-status –a command will show if any flashback
substitution events have occurred.
The following is an example of the output after entering the fio-status –a command. The numbers
represent the bank (0-3) and chip number that was substituted.
First flashback event -> No action to take as infant mortality condition on NAND
chip was caught per design.
Second flashback event –> Run fio-bugreport. Return the card (if under warranty)
when you see two or more flashback substitution events.
• Flashback active on (bank a/chip m) and (bank b/chip n) (multi-bank failure)
• Flashback active on (bank a/chip m) and (bank b/chip m) (chip failure)
On the second flashback event, include the output from running the fio-bugreport command when you
return the card.