got this message many times on my servers.
Log /var/log/vmkernel
vmkernel:38:03:22:56.663 cpu6:1064)WARNING: SCSI: 4559: Manual switchover to path vmhba3:1:1 begins.
couold any one tell what are commands to see the logs.
and also other powerfull ESX commands to check the server status.
Munish Verma