Configuring the Flash and Caching Features : Auto Configuration

Auto Configuration

*NOTE  The Auto configuration method, RAID 1 is created with Write Back write policy option only by using the Nytro Flash module. The Default or Auto configuration is created on system initialization by firmware using the Nytro Flash modules present on the Nytro MegaRAID controller.

Any modification made by you is treated as a change in the configuration, and the configuration would be changed from Default or Auto configuration to Manual configuration. If you modify the Default configuration, the new Manual configuration data is stored in NVRAM, and you cannot revert to Auto or Default configuration. To revert to Auto or Default configuration, you must select the factory default settings at the controller level. When the Auto or Default configuration is modified, firmware generates an event to notify the administrating application.

You can apply the factory default settings using the WebBIOS, MegaCLI, or Pre-boot CLI (not through MSM).

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Based on the type of the RAID level and over provisioning (28 percent), the size of the usable Nytro cache varies.

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Nytro MegaRAID software supports only RAID 0 and RAID 1 levels for Nytro Flash cache drive based on the Nytro MegaRAID Firmware Configuration parameters. Nytro MegaRAID software supports RAID 0 Write Through and Write Back. If for some reason, the Auto or Default configuration fails, it is switched to the Manual configuration.

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You cannot create a cache volume from a combination of Nytro Flash modules and external SSD drives, however if there are external SSD connected, they are treated as normal SATA PDs.

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HDD Operations, such as spare commission, rebuild, consistency check, initialization, and copy back are not supported on Nytro cache drive. Multiple Nytro cache drives can be created using the Nytro Flash drives. Using either RAID 0 or RAID 1 level.

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By default, auto configuration creates only one Nytro Cache Drive Group; you cannot change it unless you delete and create a new Nytro Cache Drive Group manually.

These are the typical operations performed:

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Create configuration.

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Clear the configuration.

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Create Nytro Cache Drive Group.

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Create Nytro cache drive.

For more information about using Nytro MegaRAID on WebBIOS, see .

For more information about using Nytro MegaRAID on MegaCLI, .

For more information about using Nytro MegaRAID features on MSM, MegaRAID Storage Manager Window and Menus.