SCSI Primary Commands - 2.pdf

18 July 2001 T10/1236-D Revision 20perform the specified LOG SENSE command and shall save all log parameters identified as savable by the DS bit(see 8.2) to a nonvolatile, vendor specific location.The page control (PC) field defines the type of parameter values to be selected (see 7.4 for the definition of thepage control field). The parameter values returned by a LOG SENSE command are determined as follows:a) The specified parameter values at the last update (i.e., in response to a LOG SELECT or LOG SENSEcommand or done automatically by the target for cumulative values);b) The saved values, if an update has not occurred since the last power-on or hard reset condition and savedparameters are implemented; orc) The default values, if an update has not occurred since the last power-on or hard reset condition and savedvalues are not available or not implemented.The PAGE CODE field identifies which page of data is being requested (see 8.2). If the page code is reserved or notimplemented, the device server shall terminate the command with CHECK CONDITION status. The sense keyshall be set to ILLEGAL REQUEST with the additional sense code set to INVALID FIELD IN CDB.The PARAMETER POINTER field allows the application client to request parameter data beginning from a specificparameter code to the maximum allocation length or the maximum parameter code supported by the target,whichever is less. If the value of the PARAMETER POINTER field is larger than the largest available parameter codeknown to the device server for the specified page, the device server shall terminate the command with CHECKCONDITION status. The sense key shall be set to ILLEGAL REQUEST and the additional sense code shall be setto INVALID FIELD IN CDB.Log parameters within the specified log page shall be transferred in ascending order according to parameter code.Additional information about the LOG SENSE command may be found in Annex A.dpANS SCSI Primary Commands - 2 (SPC-2) 97