Troubleshooting Nytro XD : Issues on Device Nodes for Virtual Drives

Issues on Device Nodes for Virtual Drives

Cache Device Failure

1.

My cache device failed.

a.

Check the reason for failure and take suitable action.

b.

Check the event messages for the failure description.

c.

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.

d.

If you have other cache devices in the configuration, which are up and running (you need not perform step c if you are satisfied with the degraded performance).

e.

If this is the only cache device, your configuration would be lost. Bring down the server, replace the cache device, and perform the First-Time Configuration again.

Virtual Drive failure

1.

My virtual drive (VD) failed.

a.

Check the reason for failure and take suitable action.

b.

Check the event messages for the failure description.

c.

Check the cable.

d.

Check if the back end enclosure is up and running.

e.

If the failure is correctable, perform these steps:

Remove the VD from the CCoH configuration.

Remove the VD from the enclosure.

Fix the VD and insert back into the enclosure.

Add the VD into the CCoH configuration.

f.

If the failure cannot be corrected, perform these steps:

Remove the VD from the CCoH configuration.

Remove the VD from the enclosure.

Insert a new working VD.

Virtual Drive Offline Issues

1.

My VD state is offline.

a.

Check the back end cable.

b.

Check if the back end enclosure is up and running.

c.

Check if the disk is up and running.

d.

Check the event messages for the offline events.

e.

Check the offline reason and take suitable action.

f.

If you cannot bring it online, perform these steps:

Remove the VD from the CCoH configuration.

Replace the VD with the new VD.

Add the VD to the CCoH configuration.

Virtual Drive Online Issues

1.

My VD is back online.

a.

Remove the VD from the CCoH configuration to delete the previous dev mapper device.

b.

Add the VD back to the CCoH configuration.