SCSI Primary Commands - 2.pdf

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T10/1236-D Revision 20 18 July 20018.2.4 Error counter pagesThis subclause defines the optional error counter pages for write errors (page code 02h), read errors (page code03h), read reverse errors (page code 04h) and verify errors (page code 05h). The log page format is defined in8.2.1. A page may return one or more log parameters that record events defined by the parameter codes. Table133 defines the parameter codes for the error counter pages. Support of each log parameter is optional.Table 133 — Parameter codes for error counter pagesParameter code0000h0001h0002h0003h0004h0005h0006h0007h - 7FFFh8000h - FFFFhDescriptionErrors corrected without substantial delayErrors corrected with possible delaysTotal (e.g., rewrites or rereads)Total errors correctedTotal times correction algorithm processedTotal bytes processedTotal uncorrected errorsReservedVendor specificNOTE 43 The exact definition of the error counters is not part of this standard. These counters should not be usedto compare products because the products may define errors differently.8.2.5 Last n deferred errors or asynchronous events pageThe last n deferred errors or asynchronous events page (page code 0Bh) provides for a number of deferred errorsor asynchronous events sense data records using the list parameter format of the log page. The number of thesedeferred errors or asynchronous events records supported, n, is vendor specific. Each deferred error orasynchronous event record contains SCSI sense data for a deferred error or asynchronous event that hasoccurred. The parameter code associated with the record indicates the relative time at which the deferred error orasynchronous event occurred. A higher parameter code indicates that the deferred error or asynchronous eventoccurred later in time.The content of the parameter value field of each log parameter is the SCSI sense data describing the deferrederror.The fields DU, TSD, ETC, and TMC are reserved and shall be set to zero. The LBIN bit shall be set to one to indicatebinary information. The LP bit shall be set to one to indicate a list parameter.8.2.6 Last n error events pageThe last n error events page (page code 07h) provides for a number of error-event records using the list parameterformat of the log page. The number of these error-event records supported, n, is vendor specific. Each error-eventrecord contains vendor specific diagnostic information for a single error encountered by the device. The parametercode associated with error-event record indicates the relative time at which the error occurred. A higher parametercode indicates that the error event occurred later in time.The content of the parameter value field of each log parameter is an ASCII character string that may describe theerror event. The exact contents of the character string is not defined by this standard.When the last supported parameter code is used by an error-event record, the recording on this page of all subsequenterror information shall cease until one or more of the list parameters with the highest parameter codes have180 dpANS SCSI Primary Commands - 2 (SPC-2)
18 July 2001 T10/1236-D Revision 20been reinitialized. If the RLEC bit of the control mode page (see 8.3.6) is set to one, the device server shall returnCHECK CONDITION status with the sense key set to RECOVERED ERROR and the additional sense code set toLOG LIST CODES EXHAUSTED. Alternatively, the device server may report this condition via asynchronous eventnotification (see SAM-2).8.2.7 Non-medium error pageThe non-medium error page (page code 06h) provides for summing the occurrences of recoverable error eventsother than write, read, or verify failures. No discrimination among the various types of events is provided byparameter code (see table 134). Vendor specific discrimination may be provided through the vendor specificparameter codes.Table 134 — Non-medium error event parameter codesParameter code0000h0001h - 7FFFh8000h - FFFFhDescriptionNon-medium error countReservedVendor specific error counts8.2.8 Self-test results pageThe self-test results log page (see table 135) provides the results from the twenty most recent self-tests (see 5.4).Results from the most recent self-test or the self-test currently in progress shall be reported in the first self-test logparameter; results from the second most recent self-test shall be reported in the second self-test log parameter;etc. If fewer than twenty self-tests have occurred, the unused self-test log parameter entries shall be zero filled.Table 135 — Self-test results pageBitByte7 6 5 4 3 2 1 00 PAGE CODE (10h)1 Reserved2 (MSB)PAGE LENGTH (190h)3 (LSB)Self-test results log parameters4First self-test results log parameter23..384Twentieth self-test results log parameter403The PAGE CODE and PAGE LENGTH fields are described in 8.2.1.dpANS SCSI Primary Commands - 2 (SPC-2) 181
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