These messages are normal and can be safely ignored.
In vSphere 4.0 and later, rescan events trigger failure messages for local devices, vmkernel logs this event every 5 minutes during the mini rescan, and whenever a rescan is triggered.
To view the vmkernel log and filter out these messages, run this command:
grep -ve " 0x85" -e " 0x4d" -e " 0x1a" -e " 0x12" <vmkernel file> | less