Common RAID Disk Data Format Specification 1.2 Errata

Transcription

1 Common RAID Disk Data Format Specification 1.2 Errata Publication of this SNIA Technical Proposal has been approved by the SNIA. This document represents a stable proposal for use as agreed upon by the Common RAID Disk Data Format Technical Working Group. The SNIA does not endorse this proposal for any other purpose than the use described. This proposal may not represent the preferred mode, and the SNIA may update, replace, or release competing proposals at any time. If the intended audience for this release is a liaison standards body, the future support and revision of this proposal may be outside the control of the SNIA or the Common RAID Disk Data Format Technical Working Group. Suggestion for revision should be directed to the Common RAID Disk Data Format Technical Working Group at ddftwg@snia.org. SNIA Technical Proposal August 29, 2007

2 Revision History Revision Date Sections Originator: Comments A 7/30/2007 Bill Dawkins Approved by SNIA Technical Council. A 8/29/2007 Bill Dawkins Published as SNIA Technical Proposal. Common RAID DDF Specification 1.2 Errata 2

3 Typographical Conventions The key words MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD, SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be interpreted as described in RFC2119 [ Usage The SNIA hereby grants permission for individuals to use this document for personal use only, and for corporations and other business entities to use this document for internal use only (including internal copying, distribution, and display) provided that: Any text, diagram, chart, table or definition reproduced must be reproduced in its entirety with no alteration, and, Any document, printed or electronic, in which material from this document (or any portion hereof) is reproduced must acknowledge the SNIA copyright on that material, and must credit the SNIA for granting permission for its reuse. Other than as explicitly provided above, you may not make any commercial use of this document, sell any or this entire document, or distribute this document to third parties. All rights not explicitly granted are expressly reserved to SNIA. Permission to use this document for purposes other than those enumerated above may be requested by ing Please include the identity of the requesting individual and/or company and a brief description of the purpose, nature, and scope of the requested use. Copyright 2007 Storage Networking Industry Association. Common RAID DDF Specification 1.2 Errata 3

4 Introduction This document contains errata to the Common RAID Disk Data Specification Version 1.2. Section The operator is first used in Eq. 3. The following text will be added directly after Eq. 3. The operator refers to bit-wise XOR of the operands. Section Eq. 42 is incorrect. The equation will be replaced with the following equation: Eq. 42 Section Eq. 48 is incorrect. The equation will be replaced with the following equation: Eq. 48 Section Eq. 54 is incorrect. The equation will be replaced with the following equation: Eq. 54 Section Figure 17 is incorrect. The figure will be replaced with the following figure: Common RAID DDF Specification 1.2 Errata 4

5 Virtual Disk Data Block 0 Data Block 1 Data Block 2 Data Block 3 Data Block 4 Data Block 5 Data Block 6 Data Block 7 Data Block 8 Data Block 9 Data Block 10 Data Block 11 Data Block 12 Data Block 13 Data Block 14 Data Block 15 Mapping Function Extent 0 Extent 1 Extent 2 Extent 3 Extent 4 Stripe 0 Depth Strip (0,0) Data Block 0 Data Block 1 Data Block 2 Data Block 3 Strip (1,0) Strip (2,0) Strip (3,0) Strip (4,0) Data Block 4 Data Block 5 Data Block 6 Data Block 7 Data Block 8 Data Block 9 Data Block 10 Data Block 11 HS Block 0 HS Block 1 HS Block 2 HS Block 3 Parity (0,4,0) Parity (1,4,0) Parity (2,4,0) Parity (3,4,0) Stripe 1 Depth Strip (0,1) Data Block 16 Data Block 17 Data Block 18 Data Block 19 Extent Stripe Length Strip (1,1) Strip (2,1) Strip (3,1) Strip (4,1) Data Block 20 Data Block 21 Data Block 22 Data Block 23 HS Block 4 HS Block 5 HS Block 6 HS Block 7 Parity (0,3,1) Parity (1,3,1) Parity (2,3,1) Parity (3,3,1) Data Block 12 Data Block 13 Data Block 14 Data Block 15 Stripe 2 Depth Strip (0,2) Data Block 32 Data Block 33 Data Block 34 Data Block 35 Strip (1,2) Strip (2,2) Strip (3,2) Strip (4,2) HS Block 8 HS Block 9 HS Block 10 HS Block 11 Parity (0,2,2) Parity (1,2,2) Parity (2,2,2) Parity (3,2,2) Data Block 24 Data Block 25 Data Block 26 Data Block 27 Data Block 28 Data Block 29 Data Block 30 Data Block 31 Figure 17: RAID-5EE Rotating Parity N with Data Continuation (PRL=25, RLQ=03) Common RAID DDF Specification 1.2 Errata 5

6 Section Section is deleted. The section is replaced with the following text RAID 6 Vendor Specific (PRL=06, RLQ=03) When the fields of a Configuration Record (Section 5.9) indicate a Primary RAID Level of 06 and a RAID Level Qualifier of 03, the data configuration of the BVD is a vendor unique implementation of RAID 6. Before importing a BVD with this PRL and RLQ, a controller MUST determine if it supports the configuration through a vendor unique method. Future versions of the specification may use the PRL=06, RLQ=03 combination for a defined RAID implementation. Common RAID DDF Specification 1.2 Errata 6