SCSI 块命令规范第四版工作草案

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SCSI Block Command 4-r02 SCSI Block Command 4-r02 是一种小型计算机系统接口（Small Computer System Interface，SCSI）块命令规范，用于定义 SCSI 设备之间的数据传输协议。该规范由 INCITS（International Committee for Information Technology Standards）下的 T10 技术委员会负责制定和维护。 SCSI Block Command 4-r02 规范的主要内容包括： 1. SCSI 块命令结构：定义了 SCSI 块命令的格式和结构，包括命令码、参数列表、数据传输协议等。 2. 数据传输协议：定义了 SCSI 设备之间的数据传输协议，包括数据传输的格式、速度、错误检测和纠正机制等。 3. 命令集：定义了一组基本的 SCSI 命令，包括读取、写入、删除、格式化等命令。 4. 状态报告：定义了 SCSI 设备的状态报告机制，包括设备的当前状态、错误信息、性能指标等。 SCSI Block Command 4-r02 规范的应用场景包括： 1. 数据存储设备：SCSI 块命令规范广泛应用于数据存储设备，如硬盘、固态硬盘、磁带机等。 2. 服务器和存储系统：SCSI 块命令规范用于服务器和存储系统之间的数据传输，确保数据的安全和可靠性。 3. 嵌入式系统：SCSI 块命令规范也应用于嵌入式系统，如工业控制系统、医疗设备、汽车电子系统等。 SCSI Block Command 4-r02 规范的优势包括： 1. 高速数据传输：SCSI 块命令规范支持高速数据传输，满足高速数据存储和处理的需求。 2. 可靠性高：SCSI 块命令规范具有高可靠性，确保数据的安全和可靠性。 3. 通用性强：SCSI 块命令规范广泛应用于各种存储设备和系统，具有强的通用性。 SCSI Block Command 4-r02 规范是一种重要的存储设备之间的数据传输协议，广泛应用于数据存储设备、服务器、存储系统、嵌入式系统等领域，具有高速数据传输、可靠性高、通用性强等优势。

T10/BSR INCITS 506 Revision 2 20 May 2014

xvi Working Draft SCSI Block Commands – 4 (SBC-4)

Table 51 —

BMOP field .................................................................................................................................. 130

Table 52 — POPULATE TOKEN command ................................................................................................ 131

Table 53 — POPULATE TOKEN parameter list .......................................................................................... 132

Table 54 — Block device range descriptor .................................................................................................. 134

Table 55 — PRE-FETCH (10) command ..................................................................................................... 135

Table 56 — PRE-FETCH (16) command ..................................................................................................... 136

Table 57 — PREVENT ALLOW MEDIUM REMOVAL command ................................................................ 137

Table 58 —

PREVENT field ............................................................................................................................ 137

Table 59 — READ (10) command ............................................................................................................... 138

Table 60 —

RDPROTECT field ........................................................................................................................ 139

Table 61 — READ (12) command ............................................................................................................... 143

Table 62 — READ (16) command ............................................................................................................... 144

Table 63 — READ (32) command ............................................................................................................... 145

Table 64 — READ CAPACITY (10) command ............................................................................................ 146

Table 65 — READ CAPACITY (10) parameter data .................................................................................... 147

Table 66 — READ CAPACITY (16) command ............................................................................................ 148

Table 67 — READ CAPACITY (16) parameter data .................................................................................... 149

Table 68 —

P_TYPE field and PROT_EN bit .................................................................................................... 149

Table 69 —

LOGICAL BLOCKS PER PHYSICAL BLOCK EXPONENT field ............................................................... 150

Table 70 — READ DEFECT DATA (10) command ..................................................................................... 151

Table 71 —

REQ_PLIST bit and REQ_GLIST bit ............................................................................................... 151

Table 72 — READ DEFECT DATA (10) parameter data ............................................................................. 152

Table 73 — READ DEFECT DATA (12) command ..................................................................................... 153

Table 74 — READ DEFECT DATA (12) parameter data ............................................................................. 154

Table 75 — READ LONG (10) command .................................................................................................... 155

Table 76 — READ LONG (16) command .................................................................................................... 157

Table 77 — REASSIGN BLOCKS command ............................................................................................... 158

Table 78 — REASSIGN BLOCKS parameter list ......................................................................................... 159

Table 79 — REASSIGN BLOCKS short parameter list header ................................................................... 159

Table 80 — REASSIGN BLOCKS long parameter list header ..................................................................... 159

Table 81 — Reassign LBA if the

LONGLBA bit is set to zero ......................................................................... 160

Table 82 — Reassign LBA if the

LONGLBA bit is set to one .......................................................................... 160

Table 83 — RECEIVE ROD TOKEN INFORMATION reference ................................................................. 161

Table 84 — RECEIVE ROD TOKEN INFORMATION parameter data for POPULATE TOKEN ................. 162

Table 85 — RECEIVE ROD TOKEN INFORMATION parameter data for WRITE USING TOKEN ............ 164

Table 86 — REPORT REFERRALS command ........................................................................................... 165

Table 87 — REPORT REFERRALS parameter data ................................................................................... 166

Table 88 — SANITIZE command ................................................................................................................. 167

Table 89 — SANITIZE service action codes ................................................................................................ 168

Table 90 — OVERWRITE service action parameter list .............................................................................. 169

Table 91 —

TEST field ................................................................................................................................... 169

Table 92 — START STOP UNIT command ................................................................................................. 171

Table 93 —

POWER CONDITION and POWER CONDITION MODIFIER field ........................................................... 172

Table 94 — SYNCHRONIZE CACHE (10) command .................................................................................. 174

Table 95 — SYNCHRONIZE CACHE (16) command .................................................................................. 175

Table 96 — UNMAP command .................................................................................................................... 176

Table 97 — UNMAP parameter list .............................................................................................................. 177

Table 98 — UNMAP block descriptor .......................................................................................................... 178

Table 99 — Data-Out Buffer contents for the VERIFY (10) command ........................................................ 179

Table 100 — VERIFY (10) command .......................................................................................................... 179

Table 101 —

VRPROTECT field with the BYTCHK field set to 00b – checking protection information from the

verify operations ....................................................................................................................................... 181

Table 102 —

VRPROTECT field with the BYTCHK field set to 01b or 11b – checking protection information

from the verify operations ......................................................................................................................... 184

Table 103 —

VRPROTECT field with the BYTCHK field set to 01b or 11b – checking protection information

from the Data-Out Buffer .......................................................................................................................... 186

Table 104 —

VRPROTECT field with the BYTCHK field set to 01b or 11b – compare operation requirements . 188

20 May 2014 T10/BSR INCITS 506 Revision 2

Working Draft SCSI Block Commands – 4 (SBC-4) xvii

Table 105 — VERIFY (12) command .......................................................................................................... 191

Table 106 — VERIFY (16) command .......................................................................................................... 192

Table 107 — VERIFY (32) command .......................................................................................................... 193

Table 108 — WRITE (10) command ............................................................................................................ 194

Table 109 —

WRPROTECT field ..................................................................................................................... 195

Table 110 — WRITE (12) command ............................................................................................................ 198

Table 111 — WRITE (16) command ............................................................................................................ 199

Table 112 — WRITE (32) command ............................................................................................................ 200

Table 113 — WRITE AND VERIFY (10) command ..................................................................................... 201

Table 114 — WRITE AND VERIFY (12) command ..................................................................................... 202

Table 115 — WRITE AND VERIFY (16) command ..................................................................................... 203

Table 116 — WRITE AND VERIFY (32) command ..................................................................................... 204

Table 117 — WRITE ATOMIC (16) command ............................................................................................. 205

Table 118 — WRITE ATOMIC (32) command ............................................................................................. 206

Table 119 — WRITE LONG (10) command ................................................................................................. 207

Table 120 —

COR_DIS bit, WR_UNCOR bit, and PBLOCK bit ............................................................................ 208

Table 121 — WRITE LONG (16) command ................................................................................................. 210

Table 122 — WRITE SAME (10) command ................................................................................................. 212

Table 123 —

UNMAP bit, ANCHOR bit, and ANC_SUP bit relationships ............................................................ 213

Table 124 — WRITE SAME (16) command ................................................................................................. 214

Table 125 —

NDOB bit and UNMAP bit interactions ........................................................................................ 214

Table 126 — WRITE SAME (32) command ................................................................................................. 215

Table 127 — WRITE USING TOKEN command ......................................................................................... 216

Table 128 — WRITE USING TOKEN parameter list ................................................................................... 217

Table 129 — XDWRITEREAD (10) command ............................................................................................. 220

Table 130 — XDWRITEREAD (32) command ............................................................................................. 221

Table 131 — XPWRITE (10) command ....................................................................................................... 222

Table 132 — XPWRITE (32) command ....................................................................................................... 223

Table 133 — Parameters for direct access block devices ........................................................................... 225

Table 134 — Address descriptors ................................................................................................................ 226

Table 135 — Short block format address descriptor (000b) ........................................................................ 226

Table 136 — Extended bytes from index format address descriptor (001b) ................................................ 227

Table 137 — Sorting order for extended bytes from index format address descriptors ............................... 227

Table 138 — Extended physical sector format address descriptor (010b) .................................................. 228

Table 139 — Sorting order for extended physical sector format address descriptors ................................. 229

Table 140 — Long block format address descriptor (011b) ......................................................................... 229

Table 141 — Bytes from index format address descriptor (100b) ................................................................ 229

Table 142 — Sorting order for bytes from index format address descriptors ............................................... 230

Table 143 — Physical sector format address descriptor (101b) .................................................................. 230

Table 144 — Sorting order for physical sector format address descriptors ................................................. 230

Table 145 — Diagnostic page codes for direct access block devices ......................................................... 231

Table 146 — Rebuild Assist Input diagnostic page ...................................................................................... 232

Table 147 — Rebuild Assist Output diagnostic page ................................................................................... 233

Table 148 — Translate Address Input diagnostic page ............................................................................... 234

Table 149 — Translate Address Output diagnostic page ............................................................................ 236

Table 150 — Log page codes and subpage codes for direct access block devices .................................... 237

Table 151 — Keywords for resetting or changing log parameters ............................................................... 238

Table 152 — Background Scan log page parameter codes ........................................................................ 239

Table 153 — Background Scan log page .................................................................................................... 239

Table 154 — Background Scan Status log parameter format ...................................................................... 240

Table 155 —

BACKGROUND SCAN STATUS field .............................................................................................. 241

Table 156 — Background Scan Results log parameter format .................................................................... 242

Table 157 —

REASSIGN STATUS field ............................................................................................................. 243

Table 158 — Format Status log page parameter codes .............................................................................. 245

Table 159 — Format Status log page .......................................................................................................... 245

Table 160 — Format Data Out log parameter format .................................................................................. 246

Table 161 — Grown Defects During Certification log parameter format ...................................................... 247

T10/BSR INCITS 506 Revision 2 20 May 2014

xviii Working Draft SCSI Block Commands – 4 (SBC-4)

Table 162 — Total Blocks Reassigned During Format log parameter format .............................................. 248

Table 163 — Total New Blocks Reassigned log parameter format ............................................................. 249

Table 164 — Power On Minutes Since Format log parameter format ......................................................... 250

Table 165 — Logical Block Provisioning log parameters ............................................................................. 251

Table 166 — Logical Block Provisioning log page ....................................................................................... 252

Table 167 — Available LBA Mapping Resource Count log parameter format ............................................. 253

Table 168 —

SCOPE field .............................................................................................................................. 253

Table 169 — Used LBA Mapping Resource Count log parameter format ................................................... 254

Table 170 — De-duplicated LBA Resource Count log parameter format .................................................... 255

Table 171 — Compressed LBA Resource Count log parameter format ...................................................... 256

Table 172 — Total Efficiency LBA Resource Count log parameter format .................................................. 257

Table 173 — Nonvolatile Cache log parameters ......................................................................................... 258

Table 174 — Nonvolatile Cache log page .................................................................................................... 258

Table 175 — Remaining Nonvolatile Time parameter data ......................................................................... 259

Table 176 —

REMAINING NONVOLATILE TIME field ........................................................................................... 259

Table 177 — Maximum Nonvolatile Time parameter data ........................................................................... 260

Table 178 —

MAXIMUM NONVOLATILE TIME field ............................................................................................. 260

Table 179 — Pending Defects log page parameter codes .......................................................................... 261

Table 180 — Pending Defects log page ...................................................................................................... 261

Table 181 — Pending Defect Count log parameter format .......................................................................... 262

Table 182 — Pending Defect log parameter format ..................................................................................... 263

Table 183 — Solid State Media log parameters .......................................................................................... 263

Table 184 — Solid State Media log page ..................................................................................................... 264

Table 185 — Percentage Used Endurance Indicator log parameter format ................................................ 264

Table 186 — Mode page codes and subpage codes for direct access block devices ................................. 265

Table 187 —

DEVICE-SPECIFIC PARAMETER field for direct access block devices .......................................... 266

Table 188 — Short LBA mode parameter block descriptor .......................................................................... 267

Table 189 — Long LBA mode parameter block descriptor .......................................................................... 269

Table 190 — Application Tag mode page .................................................................................................... 271

Table 191 — Application tag descriptor format ............................................................................................ 272

Table 192 — Background Control mode page ............................................................................................. 273

Table 193 — Caching mode page ............................................................................................................... 275

Table 194 —

DEMAND READ RETENTION PRIORITY field .................................................................................. 276

Table 195 —

WRITE RETENTION PRIORITY field .............................................................................................. 277

Table 196 —

SYNC_PROG field ...................................................................................................................... 278

Table 197 — Informational Exceptions Control mode page ......................................................................... 279

Table 198 — Definitions for the combinations of values in EW

ASC, DEXCPT, and TEST .............................. 280

Table 199 — Method of reporting informational exceptions (

MRIE) field ...................................................... 281

Table 200 — Use of the

INTERVAL TIMER field and the REPORT COUNT field based on the MRIE field ............ 283

Table 201 — Logical Block Provisioning mode page ................................................................................... 284

Table 202 — Threshold descriptor format .................................................................................................... 285

Table 203 —

THRESHOLD TYPE field .............................................................................................................. 285

Table 204 —

THRESHOLD ARMING field .......................................................................................................... 285

Table 205 — Read-Write Error Recovery mode page ................................................................................. 286

Table 206 — Error recovery bit combinations .............................................................................................. 288

Table 207 — Verify Error Recovery mode page .......................................................................................... 290

Table 208 — VPD page codes for direct access block devices ................................................................... 291

Table 209 — Block Device Characteristics VPD page ................................................................................. 292

Table 210 —

MEDIUM ROTATION RATE field .................................................................................................... 292

Table 211 —

PRODUCT TYPE field ................................................................................................................. 293

Table 212 —

WABEREQ field ......................................................................................................................... 293

Table 213 —

WACEREQ field ......................................................................................................................... 294

Table 214 —

NOMINAL FORM FACTOR field ..................................................................................................... 294

Table 215 — Block Device Characteristics Extension VPD page ................................................................ 295

Table 216 —

UTILIZATION TYPE field .............................................................................................................. 295

Table 217 — utilization units field ................................................................................................................ 296

Table 218 — utilization interval field ............................................................................................................ 296

20 May 2014 T10/BSR INCITS 506 Revision 2

Working Draft SCSI Block Commands – 4 (SBC-4) xix

Table 219 — Block Limits VPD page ........................................................................................................... 299

Table 220 — Transfer limits for commands ................................................................................................. 301

Table 221 — Logical Block Provisioning VPD page .................................................................................... 303

Table 222 —

PROVISIONING TYPE field .......................................................................................................... 304

Table 223 — Referrals VPD page ................................................................................................................ 305

Table 224 — Block device third-party copy descriptor type codes .............................................................. 306

Table 225 — Block Device ROD Token Limits descriptor ............................................................................ 307

Table 226 — Logical block length and protection types descriptor format ................................................... 308

Table 227 — ROD token device type specific data ...................................................................................... 309

Table A.1 — Variable length command service action code assignments .................................................. 310

Table A.2 — SERVICE ACTION IN (16) service actions ............................................................................. 311

Table A.3 — SERVICE ACTION OUT (16) service actions ......................................................................... 311

Table D.1 — Sense information for locked or encrypted logical units .......................................................... 318

Table F.1 — Dedicated resource, threshold set tracked example capacity information .............................. 322

Table F.2 — Dedicated resource, threshold set tracked example capacity information .............................. 323

Table F.3 — Dedicated resource, threshold set tracked example initial conditions ..................................... 324

Table F.4 — Dedicated resource, threshold set tracked example final log page values ............................. 325

Table F.5 — Shared resource, logical block tracked example capacity information .................................... 326

Table F.6 — Shared resource, logical block tracked example initial conditions .......................................... 327

Table F.7 — Shared resource, logical block tracked example final log page values ................................... 328

Table F.8 — Shared available, dedicated used example capacity information ............................................ 329

Table F.9 — Shared resource, logical block tracked example initial conditions .......................................... 330

Table F.10 — Shared available, dedicated used example final log page values ......................................... 331

Table G.1 — Referrals application client information with no user data segment multiplier ........................ 333

Table G.2 — User data segment calculations with no user data segment multiplier ................................... 333

Table G.3 — Referrals application client information with non-zero user data segment multiplier .............. 335

Table G.4 — User data segment calculations with non-zero user data segment multiplier ......................... 335

T10/BSR INCITS 506 Revision 2 20 May 2014

xx Working Draft SCSI Block Commands – 4 (SBC-4)

Figures

Page

Figure 0 — SCSI document relationships ..................................................................................................... xxii

Figure 1 — Example state machine figure ..................................................................................................... 15

Figure 2 — One or more physical blocks per logical block examples ............................................................ 22

Figure 3 — One or more logical blocks per physical block examples ............................................................ 23

Figure 4 — Two logical blocks per physical block alignment examples ......................................................... 23

Figure 5 — Four logical blocks per physical block alignment examples ........................................................ 24

Figure 6 — Examples of the relationship between mapped and unmapped LBAs and physical blocks ........ 25

Figure 7 — Armed decreasing threshold operation ....................................................................................... 31

Figure 8 — Armed increasing threshold operation ......................................................................................... 31

Figure 9 — LBP state machine (anchored LBAs supported and deallocated LBAs supported) .................... 33

Figure 10 — LBP state machine (anchored LBAs not supported) ................................................................. 34

Figure 11 — LBP state machine (deallocated LBAs not supported) .............................................................. 34

Figure 12 — SSU_PC state machine ............................................................................................................. 66

Figure 13 — Referrals .................................................................................................................................... 93

Figure B.1 — Update write operation (SCSI storage array device supervised) ........................................... 313

Figure B.2 — Regenerate operation (SCSI storage array device supervised) ............................................ 314

Figure B.3 — Rebuild operation (SCSI storage array device supervised) ................................................... 315

Figure G.1 — Referrals example with no user data segment multiplier ....................................................... 332

Figure G.2 — Referrals example with non-zero user data segment multiplier ............................................. 334

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