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About using LUNs in FlexCache volumes

You cannot use SAN access protocols to access FlexCache volumes. You can cache a volume that contains LUNs, but this configuration can change system behavior.

When you attempt to access, in a FlexCache volume, a directory that contains a LUN, the command sometimes returns "stale NFS file handle" for the LUN. If you get that error message, you should repeat the command.

If you use the fstat command on a LUN, fstat always indicates that the LUN is not cached. This is expected behavior.

Note: LUNs in this context refer to the LUNs that Data ONTAP serves to clients, not to the array LUNs used for storage on a storage array.