Nytro Cache Drive Configuration : Configuring a New Storage Device by Using MegaRAID Storage Manager : 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 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, StorCLI, or Pre-boot CLI (not through MegaRAID Storage Manager).

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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 controller supports only RAID 0 and RAID 1 levels for Nytro Cache drive based on the Nytro MegaRAID Firmware Configuration parameters. Nytro controller 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 drive from a combination of Nytro Flash modules and external SSD drives, however if there are external SSD connected, they are treated as normal SATA physical drives (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. Only one Nytro Cache drive can be created using the Nytro Flash modules. Using either RAID 0 or RAID 1 level.

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By default, auto configuration creates one RAID 1 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 and Boot drive.