SCSI Primary Commands - 2.pdf

More documents

Recommendations

Info

T10/1236-D Revision 20 18 July 20017.10.4 PERSISTENT RESERVE IN parameter data for READ RESERVATION7.10.4.1 Format of PERSISTENT RESERVE IN parameter data for READ RESERVATIONThe format for the parameter data provided in response to a PERSISTENT RESERVE IN command with the READRESERVATION service action is shown in table 69.Table 69 — PERSISTENT RESERVE IN parameter data for READ RESERVATIONBitByte7 6 5 4 3 2 1 00 (MSB)GENERATION3 (LSB)4 (MSB)ADDITIONAL LENGTH (n-7)7 (LSB)8 (MSB) Reservation descriptor(s)n(see table 70)(LSB)The GENERATION field shall be as defined for the PERSISTENT RESERVE IN READ KEYS parameter data (see7.10.3).The ADDITIONAL LENGTH field contains a count of the number of bytes to follow in reservation descriptor(s). If theallocation length specified by the PERSISTENT RESERVE IN command is not sufficient to contain the entireparameter list, then only the first portion of the list (byte 0 to the allocation length) shall be sent to the applicationclient. The incremental remaining bytes shall be truncated, although the ADDITIONAL LENGTH field shall still containthe actual number of bytes of reservation descriptor(s) and shall not be affected by the truncation. This shall not beconsidered an error.The format of the reservation descriptors is defined in table 70. There shall be a reservation descriptor for thepersistent reservation, if any, present in the logical unit and a reservation descriptor for each element, if any, havinga persistent reservation.Table 70 — PERSISTENT RESERVE IN reservation descriptorBitByte7 6 5 4 3 2 1 00 (MSB)RESERVATION KEY7 (LSB)8 (MSB)SCOPE-SPECIFIC ADDRESS11 (LSB)12 Reserved13 SCOPE TYPE1415ObsoleteIf a persistent reservation is present in the logical unit that does not contain elements, there shall be a single reservationdescriptor in the list of parameter data returned by the device server in response to the PERSISTENTRESERVE IN command with a READ RESERVATION service action. The reservation descriptor for each reser-106 dpANS SCSI Primary Commands - 2 (SPC-2)
18 July 2001 T10/1236-D Revision 20vation shall contain the RESERVATION KEY under which the persistent reservation is held. The TYPE and SCOPE ofeach persistent reservation as present in the PERSISTENT RESERVE OUT command that created the persistentreservation shall be returned (see 7.10.4.2 and 7.10.4.3).If a persistent reservation is present in the logical unit that does contain elements, there shall be a reservationdescriptor in the list of parameter data returned by the device server in response to the PERSISTENT RESERVEIN command with a READ RESERVATION service action for the LU_SCOPE persistent reservation that is held, ifany, and each ELEMENT_SCOPE persistent reservation that may be held. The reservation descriptor shall containthe RESERVATION KEY under which the persistent reservation is held. The TYPE and SCOPE of the persistent reservationas present in the PERSISTENT RESERVE OUT command that created the persistent reservation shall bereturned (see 7.10.4.2 and 7.10.4.3).If the SCOPE is an ELEMENT_SCOPE reservation, the SCOPE-SPECIFIC ADDRESS field shall contain the elementaddress, zero filled in the most significant bits to fit the field. If the SCOPE is a LU_SCOPE reservation, theSCOPE-SPECIFIC ADDRESS field shall be set to zero. The obsolete field in Bytes 14 and 15 was defined in a previousstandard.7.10.4.2 Persistent reservations Scope7.10.4.2.1 Summary of persistent reservations ScopeThe value in the SCOPE field shall indicate whether a persistent reservation applies to an entire logical unit or to anelement. The values in the SCOPE field are defined in table 71.7.10.4.2.2 Logical unit scopeA SCOPE field value of LU_SCOPE shall indicate that the persistent reservation applies to the entire logical unit.The LU_SCOPE scope shall be implemented by all device servers that implement PERSISTENT RESERVE OUT.7.10.4.2.3 Element scopeTable 71 — Persistent reservation scope codesCode Name Description0h LU_SCOPE Persistent reservation applies to the full logical unit1hObsolete2h ELEMENT_SCOPE Persistent reservation applies to the specified element3h - Fh Reserved ReservedA SCOPE field value of ELEMENT_SCOPE shall indicate that the persistent reservation applies to the element ofthe logical unit defined by the SCOPE-SPECIFIC ADDRESS field in the PERSISTENT RESERVE OUT parameter list.An element is defined by the SMC-2 standard. The ELEMENT_SCOPE scope is optional for all device servers thatimplement PERSISTENT RESERVE OUT.dpANS SCSI Primary Commands - 2 (SPC-2) 107
Page 1 and 2:
dpANSProjectT10/1236-DRevision 2018
Page 3:
DraftANSI (r)NCITS.351:200xAmerican
Page 6 and 7:
T10/1236-D Revision 20 18 July 2001
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75: T10/1236-D Revision 20 18 July 2001
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281:
Page 282 and 283:
Page 284 and 285:
Page 286 and 287:
Page 288 and 289:
Page 290 and 291:
Page 292 and 293:
show all

SCSI Primary Commands - 2.pdf

Create successful ePaper yourself

Delete template?

Save as template?