Troubleshooting Nytro XD

Troubleshooting Nytro XD

This topic describes the known issues on the MegaRAID Storage Manager (MSM) GUI and their probable solutions.

Nytro XD Configuration Issues

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The device discovery is automatic; the devices have to be identified automatically and added to Nytro XD as either cache devices or target devices.

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Take care not to add the devices that have boot partition or any other information as cache devices, because it would be overwritten.

Nytro XD Start-up Issues

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I encountered problems during start-up checks.

Restart your system.

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My Nytro XD configuration does not load and initialize.

Check if you have completed the LSI licensing procedure.

Linux Start-up Issues

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I encountered problems during start-up checks.

Restart your system.

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My Nytro XD service stop failed.

The Nytro XD service stop can fail if the target device is active, or if there is an active mounted file system on the target device. Unmount all of the target devices and stop the Nytro XD service.

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Unable to restart the Nytro XD service after the stop service failed.

If the previous invocation of the Nytro XD service stop has failed, the subsequent invocation of start service can fail or might fail to bring up all of the configured target devices. Unmount all of the target devices and stop the Nytro XD service.

Windows Start-up Issues

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I encountered problems during start-up checks.

Restart your system.

Steady Mode Issues

This section describes the problems encountered after the Nytro XD solution is configured and when it is in a running state.

Cache Device Failure

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My cache device failed.

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Check the reason for failure and take suitable action.

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Check the event messages for the failure description.

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If the failure is correctable, perform these steps:

Bring down the server.

Remove the cache device, correct it, and reinsert it.

Bring up the server.

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If this is the only cache device, your configuration would be lost. Bring down the server, replace the cache device and perform these steps:

Activate the Nytro X D caching feature on the replacement WarpDrive card by retrieving the Safe ID and the serial number for the replacement WarpDrive.

Get the serial number from the failed WarpDrive.

Call the LSI customer support personnel and provide this information.

An activation key would be sent to you by the LSI customer support personnel through e-mail.

Apply the activation key using the instructions in provided in Applying the Activation Key.

Virtual Drive Failure

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My virtual drive (VD) failed.

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Check the reason for failure and take suitable action.

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Check the event messages for the failure description.

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Check the cable.

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Check if the back-end enclosure is up and running.

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If the failure is correctable, perform these steps:

Remove the VD from the Nytro XD configuration.

Remove the VD from the enclosure.

Fix the VD and insert back into the enclosure.

Add the VD into the Nytro XD configuration.

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If the failure cannot be corrected, perform these steps:

Remove the VD from the Nytro XD configuration.

Remove the VD from the enclosure.

Insert a new working VD.

Virtual Drive Offline Issues

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My VD state is offline.

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Check if the back end enclosure is up and running.

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Check the back end cable.

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Check if the disk is up and running.

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Check the event messages for the offline events.

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Check the offline reason and take suitable action.

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If you cannot bring it online, perform these steps:

Remove the VD from the Nytro XD configuration.

Replace the VD with the new VD.

Add the VD to the Nytro XD configuration.

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I made my VD offline using my application, but the state is not reflected in Nytro XD.

Nytro XD is a host-based solution, and relies on the operating system (OS) component to update the device state change. Different tools might have their own way to make the devices offline or online. Nytro XD does not receive these events unless this is propagated to the OS by the corresponding software. Nytro XD does not move the state of the device if the state is not propagated, because this would result in miss match between the device OS state and Nytro XD state.

Virtual Drive Online Issues

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My VD is back online, but I am unable to access it.

See Making the Cached Virtual Drives Online.

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Foreign Configuration Issues

The Nytro XD solution depends on BIOS UU ID to identify native and foreign configurations. Some flavors of Linux are known to report the same BIOS UU ID in different formats due to which Nytro XD solution might report foreign configuration on an upgrade (for example, RHEL 5.7 to RHEL 6.0). You must reconfigure the Nytro XD solution on an upgrade if you notice this error.

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Licensing Issues

I removed a WarpDrive from my host, and the Nytro XD configuration is not getting activated.Check if the WarpDrive you removed had the Nytro XD premium feature license on it, Nytro XD requires at least one WarpDrive on the host to have the Nytro XD premium feature key enabled to activate the configuration. Shut down the host and reinsert the removed WarpDrive, and power it up for the Nytro XD configuration to be activated. For more information, see Activating the Nytro XD Feature.