Hello, I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review.  Document editors and WG chairs should treat these comments just like any other last call comments. This document is for the Standards Track and if approved Updates RFC 5661. This document is a clarification of RFC 5661 - " Network File System (NFS) Version 4 Minor Version 1 Protocol" NITS ==== The tool has found the following:  == Outdated reference: A later version (-05) exists of draft-ietf-nfsv4-flex-files-02 Additional NITS =============== Abstract First Sentence: Repetition of the word "those". This document provides help in distinguishing between the requirements for Network File System (NFS) version 4.1's Parallel NFS (pNFS) and those those specifically directed to the pNFS File Layout. Section 2: Definitions - Not sure whether the word :striped" was intended here. Data Server (DS): is one of the pNFS servers which provide the contents of a file system object which is a regular file. Depending on the layout, there might be one or more data servers over which the data is striped .  Section 2: Definitions - Suggest "lay out" rather than "lays out". Layout Type: describes both the storage protocol used to access the data and the aggregation scheme used to lays out the file data on the underlying storage devices.  Section 3.3:  Editorial Requirements - Suggest "separately" rather than "separably" "While these could be envisioned as one section in that the fencing issue might be the only security issue, it is recommended to deal with them separably ." Other than the above nits I have no further issues with this document. Thank you kindly. Best Regards, Menachem Dodge