SCSI Primary Commands - 2.pdf

More documents

Recommendations

Info

T10/1236-D Revision 20 18 July 2001target-defined method for saving all log parameters without changing any TSD bits. See the GLTSD bit in the controlmode page (see 8.3.6).An enable threshold comparison (ETC) bit of one indicates that a comparison to the threshold value is performedwhenever the cumulative value is updated. An ETC bit of zero indicates that a comparison is not performed. Thevalue of the ETC bit is the same for cumulative and threshold parameters.The threshold met criteria (TMC) field (see table 125) defines the basis for comparison of the cumulative andthreshold values. The TMC field is valid only if the ETC bit is one. The value of the TMC field is the same forcumulative and threshold parameters.Table 125 — Threshold met criteriaCode Basis for comparison00b Every update of the cumulative value01b Cumulative value equal threshold value10b Cumulative value not equal threshold value11b Cumulative value greater than threshold valueIf the ETC bit is one and the result of the comparison is true, a unit attention condition shall be generated for all initiators.When reporting the unit attention condition, the device server shall set the sense key to UNIT ATTENTIONand set the additional sense code to THRESHOLD CONDITION MET.The LBIN bit is only valid if the LP bit is set to one. If the LP bit is one and the LBIN bit is zero then the list parameteris a string of ASCII graphic codes (i.e., code values 20h through 7Eh). If the LP bit is one and the LBIN bit is onethen the list parameter is a list of binary information.The list parameter (LP) bit indicates the format of the log parameter. If an application client attempts to set thevalue of the LP bit to a value other than the one returned for the same parameter in the LOG SENSE command, thedevice server shall terminate the command with CHECK CONDITION status. The sense key shall be set toILLEGAL REQUEST with the additional sense code set to INVALID FIELD IN PARAMETER LIST.An LP bit of zero indicates that the parameter is a data counter. Data counters are associated with one or moreevents; the data counter is updated whenever one of these events occurs by incrementing the counter value. Ifeach data counter has associated with it a target-defined maximum value. Upon reaching this maximum value, thedata counter shall not be incremented (i.e., it does not wrap). When a data counter reaches its maximum value,the device server shall set the associated DU bit to one. If the data counter is at or reaches its maximum valueduring the execution of a command, the device server shall complete the command. If the command completescorrectly, except for the data counter being at its maximum value, and if the RLEC bit of the control mode page (see8.3.6) is set to one; then the device server shall terminate the command with CHECK CONDITION status and setthe sense key to RECOVERED ERROR with the additional sense code set to LOG COUNTER AT MAXIMUM.An LP bit of one indicates that the parameter is a list parameter. List parameters are not counters and thus the ETCand TMC fields shall be set to zero.If more than one list parameter is defined in a single log page, the following rules apply to assigning parametercodes:a) The parameter updated last shall have a higher parameter code than the previous parameter, except asdefined in rule b);b) When the maximum parameter code value supported by the target is reached, the device server shallassign the lowest parameter code value to the next log parameter (i.e., wrap-around parameter codes). Ifthe associated command completes correctly, except for the parameter code being at its maximum value,174 dpANS SCSI Primary Commands - 2 (SPC-2)
18 July 2001 T10/1236-D Revision 20and if the RLEC bit of the control mode page (see 8.3.6) is set to one; then the device server shall terminatethe command with CHECK CONDITION status and set the sense key to RECOVERED ERROR with theadditional sense code set to LOG LIST CODES EXHAUSTED.NOTE 41 List parameters may be used to store the locations of defective blocks in the following manner. When adefective block is identified, a list parameter is updated to reflect the location and cause of the defect. When thenext defect is encountered, the list parameter with the next higher parameter code is updated to record this defect.The size of the page may be made vendor specific to accommodate memory limitations. It is recommended thatone or more data counter parameters be defined for the page to keep track of the number of valid list parametersand the parameter code of the parameter with the oldest recorded defect. This technique may be adapted torecord other types of information.The parameter length field specifies the length in bytes of the following parameter value. If the application clientsends a parameter length value that results in the truncation of the parameter value, the device server shallterminate the command with CHECK CONDITION status. The sense key shall be set to ILLEGAL REQUEST withthe additional sense code set to INVALID FIELD IN PARAMETER LIST.If the application client sends a log parameter value that is outside the range supported by the target, and roundingis implemented for that parameter, the device server may either:a) round to an acceptable value and terminate the command as described in 5.3; orb) terminate the command with CHECK CONDITION status and set the sense key to ILLEGAL REQUESTwith the additional sense code set to INVALID FIELD IN PARAMETER LIST.When any counter in a log page reaches its maximum value, incrementing of all counters in that log page shallcease until reinitialized by the application client via a LOG SELECT command. If the RLEC bit of the control modepage is one, then the device server shall report the exception condition.dpANS SCSI Primary Commands - 2 (SPC-2) 175
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:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143: T10/1236-D Revision 20 18 July 2001
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?