ISO/IEC INTERNATIONAL STANDARD 14776-342 First edition 2000-06 Information technology - Small Computer System Interface - Part 342: Controller Commands-2 (SCC-2) IEC Reference number ISO/IEC 14776-342:2000(E) PATENT STATEMENT The International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) draw attention to the fact that it is claimed that compliance with this International Standard may involve the use of patents concerning SCC-2. The ISO and IEC take no position concerning the evidence, validity and scope of the patent rights. The holder of the putative patent rights licences under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of the putative patent rights is registered with the ISO and IEC. Information my be obtained from: IBM Corporation Intellectual Property Licensing 5600 Cottle Road San Jose, CA 95153 Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights other than those identified above. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC INTERNATIONAL STANDARD 14776-342 First edition 2000-06 Information technology - Small Computer System Interface - Part 342: Controller Commands-2 (SCC-2) @ ISO/IEC 2000 IEC PRICE CODE XD Forprice,see current catalogue 14776-342 @ ISO/IEC:2000(E) Contents Page Foreword Introduction X 1 Scope 2 Normative references .. 3 Definitions, symbols, abbreviations, and conventions .... 3.1 Definitions ... 3.2 Symbols and abbreviations 3.3Keywords 3.4 Conventions 4 General 5 Models for systems containing arrays of devices 5.2 System layering model ... 5.2.1 SACL functions 5.2.2 Protocol conversion layer .. 5.2.3 Storage array conversion layer (SACL) 5.2.4 Examples of system layering variations. 5.2.5 Branch of generic layers ..... 5.2.7 Branch with HBA SACL . 13 5.2.8 Branch with bridge controller SACL 14 5.2.9 Branch with SACLs in multiple layers 15 5.3 Model for SCSI storage arrays ... 5.3.1 ScsI storage array addressing ..... 5.3.1.1 SCSI storage array LUN_Z address 16 5.3.1.2 Direct addressing 16 5.3.1.2.1 Eight byte LUN structure 16 5.3.1.2.2 Logical unit address method 18 5.3.1.2.3 Peripheral device address method 18 5.3.1.2.4 Volume set address method 19 5.3.3 Indirect addressing ........ 5.3.1.3.1 Component device address method 5.3.1.3.2 Logical unit address method 20 5.3.1.3.3Peripheraldeviceaddressmethod .20 5.3.1.3.4 Redundancy group address method 21 5.3.1.3.5 Spare address method . 21 5.3.1.3.6 Volume set address method 21 5.3.2 ScSI storage array objects 5.3.2.1 Adding objects ... 22 5.3.2.2 Association of objects 22 5.3.2.3 Attachment of objects . 22 5.3.2.4 Covering of objects 5.3.2.5 Exchanging objects 23 5.3.2.6 Protected objects 23 5.3.2.7 Removing objects .... 5.3.2.8 Component device 23 5.3.2.9 Peripheral device 23 5.3.2.10 P_extent ... 24 5.3.2.11 Ps_extent 24 5.3.12 Redundancy group ........ 5.3.2.12.1 No redundancy method of check data mapping .28 .28 14776-342@ISO/EC:2000(E) 5.3.2.12.3 XOR or P+Q redundancy method of check data mapping 5.3.2.12.4 S redundancy method of check data mapping .... 5.3.2.12.5 P+S redundancy method of check data mapping .... .28 5.3.2.12.6 Vendor specific redundancy method of check data mapping 5.3.2.13Spares... 5.3.2.14 Volume sets .30 5.3.3 scsI storage array operations .. ..35 5.3.3.1 Deassign LUN_V operation ... 5.3.3.2 Rebuild operation .... 5.3.3.3 Recalculate operation .35 5.3.3.4Regenerateoperation ..35 5.3.3.5 Verify operation ... ..35 5.3.4 ScSI storage array states .35 5.3.5 ScSI storage array configuration options 5.3.5.1 Simple configuration method .... ..36 5.3.5.2 Basic configuration method 5.3.5.3 General configuration method .37 5.3.6 ScSI storage array exception conditions 6 Commands for ScSI storage array devices .39 6.1 Op codes for ScSI storage array commands 6.2 Gloss