draft-ietf-nfsv4-pnfs-block-disk-protection-00.txt   draft-ietf-nfsv4-pnfs-block-disk-protection-01.txt 
NFSv4 Working Group D. Black NFSv4 Working Group D. Black
Internet-Draft EMC Corporation Internet-Draft EMC Corporation
Intended status: draft J. Glasgow Intended status: draft J. Glasgow
Expires: May 18, 2012 Google Expires: May 22, 2012 Google
Updates: 5663 S. Faibish Updates: 5663 S. Faibish
Intended Status: Proposed Standard EMC Corporation Intended Status: Proposed Standard EMC Corporation
November 17, 2011 November 21, 2011
pNFS block disk protection pNFS block disk protection
draft-ietf-nfsv4-pnfs-block-disk-protection-00 draft-ietf-nfsv4-pnfs-block-disk-protection-01
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html http://www.ietf.org/shadow.html
This Internet-Draft will expire on May 18, 2012. This Internet-Draft will expire on May 22, 2012.
Copyright Notice Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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Table of Contents Table of Contents
1. Introduction...................................................3 1. Introduction...................................................3
2. Conventions used in this document..............................4 2. Conventions used in this document..............................4
3. GPT Partition Table Entry......................................4 3. GPT Partition Table Entry......................................4
4. Security Considerations........................................5 4. Security Considerations........................................5
5. IANA Considerations............................................5 5. IANA Considerations............................................5
6. Conclusions....................................................5 6. Conclusions....................................................5
7. References.....................................................5 7. References.....................................................5
7.1. Normative References......................................5 7.1. Normative References......................................5
7.2. Informative References....................................6
Acknowledgements..................................................6
Authors' Addresses................................................6 Authors' Addresses................................................6
1. Introduction 1. Introduction
Figure 1 shows the overall architecture of a Parallel NFS (pNFS) Figure 1 shows the overall architecture of a Parallel NFS (pNFS)
system: system:
+-----------+ +-----------+
|+-----------+ +-----------+ |+-----------+ +-----------+
||+-----------+ | | ||+-----------+ | |
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pNFS block devices until a layout that includes the device is pNFS block devices until a layout that includes the device is
received from the MDS. received from the MDS.
Data stored on pNFS block layout storage devices can be better Data stored on pNFS block layout storage devices can be better
protected by incorporating checks for this GUID into other hosts and protected by incorporating checks for this GUID into other hosts and
systems that do not support pNFS block layouts. If pNFS block systems that do not support pNFS block layouts. If pNFS block
storage devices are presented to such hosts or systems by mistake, storage devices are presented to such hosts or systems by mistake,
the check for presence of this GUID can be used to prevent writes the check for presence of this GUID can be used to prevent writes
that could otherwise corrupt stored pNFS data. that could otherwise corrupt stored pNFS data.
As of 2011 many current operating system versions support GPT As of November 2011, many current operating system versions support
including FreeBSD, Linux and Solaris [GPT]. the GPT, including FreeBSD, Linux and Solaris [GPT-W].
4. Security Considerations 4. Security Considerations
The pNFS block layout security considerations in [RFC5663] apply to The pNFS block layout security considerations in [RFC5663] apply to
this document. this document.
5. IANA Considerations 5. IANA Considerations
There are no IANA considerations in this document. There are no IANA considerations in this document.
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This document specifies an identification mechanism for pNFS block This document specifies an identification mechanism for pNFS block
storage devices that can be used to protect those devices during storage devices that can be used to protect those devices during
operating system boot before the pNFS meta data server can be operating system boot before the pNFS meta data server can be
contacted. contacted.
7. References 7. References
7.1. Normative References 7.1. Normative References
[GPT] http://en.wikipedia.org/wiki/GUID_Partition_Table [GPT] Unified EFI Forum, "Unified Extensible Firmware Interface
Specification", Version 2.3.1, Errata A, Section 5.3,
September 2011, available from http://www.uefi.org .
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5663] Black, D., Glasgow, J., Fridella, S., "Parallel NFS (pNFS) [RFC5663] Black, D., Glasgow, J., Fridella, S., "Parallel NFS (pNFS)
Block/Volume Layout", http://tools.ietf.org/html/rfc5663, Block/Volume Layout", RFC 5663, January 2010.
January 2010.
7.2. Informative References
[GPT-W] http://en.wikipedia.org/wiki/GUID_Partition_Table
Acknowledgements
This document was produced by the IETF NFSv4 Working Group. Review
comments from members of the working group improved this document and
are gratefully acknowledged. The authors would like to thank Tom
Talpey for helpful comments on this document, and Alex Burlyga for
providing an appropriate reference for the format of the GPT.
This document was prepared using 2-Word-v2.0.template.dot. This document was prepared using 2-Word-v2.0.template.dot.
Authors' Addresses Authors' Addresses
David L. Black (editor) David L. Black (editor)
EMC Corporation EMC Corporation
176 South Street 176 South Street
Hopkinton, MA 01748 Hopkinton, MA 01748
US US
Phone: +1 (508) 293-7953 Phone: +1 (508) 293-7953
Email: david.black@emc.com Email: david.black@emc.com
Jason Glasgow Jason Glasgow
Google Google
5 Cambridge Center, Floors 3-6 5 Cambridge Center, Floors 3-6
Cambridge, MA 02142 Cambridge, MA 02142
US US
Phone: +1 (617) 575 1599 Phone: +1 (617) 575-1599
Email: jglasgow@google.com Email: jglasgow@google.com
Sorin Faibish Sorin Faibish
EMC Corporation EMC Corporation
228 South Street 228 South Street
Hopkinton, MA 01748 Hopkinton, MA 01748
US US
Phone: +1 (508) 305-8545 Phone: +1 (508) 305-8545
Email: sfaibish@emc.com Email: sfaibish@emc.com
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