The serially-attached SCSI (SAS) PHY monitor detected an error or a change in the disk subsystem.

Administrator action

If the drive was recently replaced, you can safely ignore this event.

If a drive was not recently replaced, make sure that the drive firmware is updated to the latest version. Drive firmware is available from the EMC Online Support site.

If the event persists, gather logs, and then contact EMC Isilon Technical Support for additional troubleshooting. For instructions, see Gathering cluster logs.