2.1.2.5 Node Abort

If a node does not leave cleanly, it is either because the host crashed or because some cluster component decided to make the node leave on an emergency basis. The ensuing cluster reconfiguration calls the CVM abort function. This function makes an attempt to halt all access to shared volumes at once, though the operation waits until I/O that is at the disk completes. I/O operations that have not yet been started are failed, and the shared volumes are removed. Applications that were accessing the shared volumes, therefore, fail with errors.

After a node abort or crash, the shared volumes must be recovered (either by a surviving node or by a subsequent cluster restart) because it is very likely that there are unsynchronized mirrors.