Hp PCIe IO Accelerators for ProLiant Servers Bedienungsanleitung PDF herunterladen (Seite 103)

Monitoring IO Accelerator health 103

HP 160GB SLC PCIe ioDrive for ProLiant Servers, Product Number:600278-B21

...

Media status: Healthy; Reserves: 100.00%, warn at 10.00%; Data: 99.12%

Lifetime data volumes:

...Physical bytes written: 6,423,563,326,064

...Physical bytes read: 5,509,006,756,312

The following Health Status messages are produced by the fio-status utility:

• Healthy

• Low metadata

• Read-only

• Reduced-write

• Unknown

HP IO Accelerator Management Tool

In the Device Report tab, look for the Reserve Space percentage in the right column. The higher the

percentage, the healthier the drive is likely to be.

SNMP

See "Setting up SNMP for Linux" or "Setting up SNMP for Windows" for details on how to configure

SNMP health indicators.

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.

Software RAID and health monitoring

Software RAID stacks are typically designed to detect and mitigate the failure modes of traditional storage

media. The IO Accelerator attempts to fail as gracefully as possible, and its new failure mechanisms are

compatible with existing software RAID stacks. A drive in write-reduced mode participating in a write-

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Hp PCIe IO Accelerators for ProLiant Servers Bedienungsanleitung Seite 103