HP c-Class Vmware manual Enabling the override parameter

Page 24

Important considerations

If you are installing more than one dual IO Accelerator device and enabling the override parameter for each device, be sure the motherboard is rated to provide 55W power to each slot used. For example, some motherboards safely provide up to 75W to any one slot, but run into power constraints when multiple slots are used to provide that much power. Installing multiple devices in this situation might result in server hardware damage. Consult with the manufacturer to determine the total PCIe slot power available.

The override parameter persists in the system and enables full power draw on an enabled device even if the device is removed and then placed in a different slot within the same system. If the device is placed in a slot that is not rated to provide 55W of power, your server hardware could experience a power drag.

The override parameter is a setting for the IO Accelerator VSL software by server and is not stored in the device. When moved to a new server, the device defaults to the 25 W power limit until an external power cable is added or the override parameter is enabled for that device in the new server. To determine the total PCIe slot power available for the new server, consult the manufacturer.

Enabling the override parameter

1.Use one of the following methods to determine the serial number of each device to be installed in a compatible slot.

oEnter the fio-status command. Sample output:

fio-status

...

Adapter: Dual Controller Adapter

Fusion-io ioDrive2 DUO 2.41TB, Product Number:F01-001-2T41-CS-0001, FIO SN:1149D0969

External Power: NOT connected

PCIe Power limit threshold: 24.75W Connected ioMemory modules: fct2: SN:1149D0969-1121

fct3: SN:1149D0969-1111

In this example, 1149D0969 is the adapter serial number.

If you have multiple IO Accelerator devices installed on your system, use the fio-beaconcommand to verify where each device is physically located.

oInspect the adapter serial number labels on the IO Accelerator devices to determine the serial numbers. However, HP recommends confirming that each serial number is an adapter serial number by running the fio-statuscommand. The adapter serial number label resides on the back of all HP ioDrive Duo devices and HP ioDrive2 Duo devices. On ioDrive Duos, the serial number is located on the PCB component that is attached to the PCIe connector.

2.Set the module parameter using the esxcfg-modulecommand. For example: esxcfg-module--server<server-name>iomemory-vsl-s

'external_power_override=<value>'

Where the <value> for this parameter is a comma-separated list of adapter serial numbers. For example:

Maintenance 24

Image 24
Contents HP IO Accelerator Version 3.2.3 VMware ESX ESXi User Guide Page Contents Module parameters Contents summary About this guideIntroduction OverviewProduct naming Performance attributes IO Accelerator capacity 320GB 640GB Models AJ878B BK836ARequired operating environment Supported firmware revisionsSupported hardware 192 096 048 12.4 GB 024 11.6 GB 15.7 GB 24 GB Introduction Before you begin Software installation Command-line installationESX command-line installation ESXi command line installationInstallation overview Downloading the VMware ESXi driverIomemory-vsl-version.zip Vmfs/volumes/datastore/bundles Transferring the VSL files to the ESX or ESXi serverVifs.pl --server servername --mkdir datastorebundles Installing the VSL on ESXi Installing the VSL on ESX or ESXiInstalling the VSL on ESXi 5.0 using vCLI Installing the VSL on ESXi 5.0 using the command lineUpgrading the firmware using ESX Installing the VSL on ESX or ESXi 4.x using vCLIUpgrading procedure Upgrading device firmware from VSL 1.x.x or 2.x.x toFio-bugreport Iomemory-vsl block driver for ESXiIomemory-vsl block driver for ESX/ESXi Enabling PCIe power Configuring the device to support VM disksFio-update-iodrive iodriveversion.fff Modifying a VMware resource pool to reserve memory Using the IO Accelerator as swap with ESX Maintenance Maintenance toolsCommand-line utilities for Tech Support Mode Management utilities for ESXiEnabling PCIe power override Command line Purpose UtilityEnabling the override parameter Common maintenance tasks Disabling the driverEnabling the driver 1149D0969,1159E0972,24589Uninstalling the IO Accelerator driver package Disabling auto attachEnabling auto attach # esxcfg-module -s autoattach=1 iomemory-vslUnmanaged shutdown issues Performance and tuning Introduction to performance and tuningDisabling Dvfs Limiting Apci C-statesUtilities Utilities referenceFio-attach Fio-beacon Fio-bugreportFio-attach device options Fio-beacon device optionsFio-bugreport Fio-detach Fio-formatFio-detach device options Fio-pci-check Fio-format options deviceFio-status Fio-pci-check optionsFio-status device options Utilities Fio-update-iodrive Geometry and capacity information not available appearsFio-update-iodrive options iodriveversion.fff Utilities Monitoring IO Accelerator health Nand flash and component failureHealth metrics Health monitoring techniquesFlashback substitution events Using module parameters Module parametersEsxcfg-module --server server-name iomemory-vsl -g Using products with multiple devices VMDirectPathIOWorking with IO Accelerators and VMDirectPathIO Subscription service ResourcesFor more information Support and other resources Before you contact HPHP contact information Customer Self RepairRéparation par le client CSR Riparazione da parte del cliente Reparaciones del propio cliente Reparo feito pelo cliente Support and other resources Support and other resources Support and other resources Safety and regulatory compliance Warranty informationRegulatory information Acronyms and abbreviations Vmfs Documentation feedback Index Transferring VSL files