SCSI Primary Commands - 2.pdf

T10/1236-D Revision 20 18 July 20018.2 Log parameters8.2.1 Log page structure and page codes for all device typesThis subclause describes the log page structure and the log pages that are applicable to all SCSI devices. Pagesspecific to each device type are described in the command standard (see 3.1.12) that applies to that device type.The LOG SELECT command supports the ability to send zero or more log pages. The LOG SENSE command(see 7.5) returns a single log page specified in the PAGE CODE field of the CDB.Each log page begins with a four-byte page header followed by zero or more variable-length log parametersdefined for that page. The log page format is defined in table 123.Table 123 — Log page formatBitByte7 6 5 4 3 2 1 00 PAGE CODE1 Reserved2 (MSB)PAGE LENGTH (n-3)3 (LSB)Log parameter(s)4 Log parameter (First)x+3(Length x)..n-y+1Log parameter (Last)n(Length y)The PAGE CODE field identifies which log page is being transferred.The PAGE LENGTH field specifies the length in bytes of the following log parameters. If the application client sends apage length that results in the truncation of any parameter, the device server shall terminate the command withCHECK CONDITION status. The sense key shall be set to ILLEGAL REQUEST with the additional sense code setto INVALID FIELD IN PARAMETER LIST.172 dpANS SCSI Primary Commands - 2 (SPC-2)