HP Ie Workload Accelerators for Servers manual

a.Run rssdm -S.

b.Check SMART attribute 194 (enclosure temperature) and compare value to the temp throttle threshold in C.

c.If the enclosure temperature is greater than or equal to the threshold temperature, performance decreases.

Problem: How can the Power Limiting setting be enabled on the HP PCIe Workload Accelerator?

Solution: If your system is running a support pack release later than B126.01, the power limiting setting is disabled by default.

To enable the power limiting setting, use the RSSDM command line interface (CLI):

1.In the command line, type the following command where <Drive_id> is the ID number of the HP PCIe Workload Accelerator, which can be found by running rssdm -L. rssdm –M –p 1 –n<Drive_id>

2.Power-cycle the system.

3.Verify the setting change by running the following command: rssdm –L –d

Problem: When disabling an ATA channel using Windows Device Manager in Windows Server 2008, the Microsoft Management Console (MMC) stops responding, the computer will not shut down, and a "Stop 0x0000009F" message appears after 10 minutes.

Solution: This is an issue specific to Microsoft Windows and is not related to the HP PCIe Workload Accelerator driver. The issue has been corrected for Windows Server 2008 as a hot fix; check the Microsoft web site for details.

Problem: The Percentage Lifetime Used or Write Protect Progress SMART parameter report shows 100% for the HP PCIe Workload Accelerator.

Solution: These reports both indicate the HP PCIe Workload Accelerator is in the write protect state. In this state, no additional data can be written to the drive (the drive is in a read-only mode). All data on the drive is preserved and can be read or backed up. Back up the data on the drive. After the data is backed up, it is highly recommended to replace the drive and refrain from using it.

Problem: What are the behavior characteristics of a HP PCIe Workload Accelerator SSD that becomes too hot? Can the drive still be used? What steps can be taken to reduce the SSD's temperature?

Solution: Two mechanisms control temperature and prevent damage to the drive: thermal limiting and thermal shutdown. Thermal limiting is a dynamic mechanism that monitors temperature in the background while host I/O traffic is being processed on the drive. If the SSD temperature exceeds a preset limit, host traffic will be progressively reduced until the temperature goes below the threshold point. Once below this threshold point, host traffic will be unthrottled and full performance restored. If the temperature continues to increase above the threshold point, host IOPS will continue to be throttled until the drive is in the thermal shutdown state. In this state, the drive will be disabled from all I/O traffic but will continue to be recognized by the system.

To verify the state:

•In Linux: run the rssdm –L command or check the Linux message logs (the drive will be reported to be in the thermal shutdown state).

•In Windows: check the Event/Error log and verify a thermal shutdown event occurred.

To recover from a thermal shutdown state:

1.Shut down the system.

2.Remove the HP PCIe Workload Accelerator from the system and allow it to cool.

3.If the HP PCIe Workload Accelerator is running firmware older than version 1.45, upgrade the firmware to the latest available support pack release.

4.Check the SSD placement in the system motherboard and make sure there is sufficient airflow around the SSD, as specified in the data sheet. If possible, place the SSD in a PCIe slot that provides unobstructed airflow.

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