SCSI Primary Commands - 2.pdf

T10/1236-D Revision 20 18 July 20017.20.2 Sense data formatThe sense data format for response codes 70h (current errors) and 71h (deferred errors) are defined in table 102.Table 102 — Response codes 70h and 71h sense data formatBitByte7 6 5 4 3 2 1 00 VALID RESPONSE CODE (70h or 71h)1 Obsolete2 FILEMARK EOM ILI Reserved SENSE KEY3 (MSB)6INFORMATION(LSB)7 ADDITIONAL SENSE LENGTH (n-7)8 (MSB)COMMAND-SPECIFIC INFORMATION11 (LSB)12 ADDITIONAL SENSE CODE13 ADDITIONAL SENSE CODE QUALIFIER14 FIELD REPLACEABLE UNIT CODE15 SKSV1718nSENSE-KEY SPECIFICAdditional sense bytesA VALID bit of zero indicates that the INFORMATION field is not as defined in this standard. A VALID bit of one indicatesthe INFORMATION field contains valid information as defined in this standard. Device servers shall implement theVALID bit.Response code value 70h (current errors) is described in 7.20.4. Device servers shall implement response code70h. Response code value 71h (deferred errors) is described in 7.20.5. Implementation of response code 71h isoptional. Response code 7Fh is for a vendor specific sense data formats. Response code values of 72h to 7Ehand 00h to 6Fh are reserved.The obsolete byte 1 contained information used by the COPY command.The FILEMARK bit is mandatory for sequential-access devices, and this bit is reserved for all other device types. AFILEMARK bit of one indicates that the current command has read a filemark or setmark. The ADDITIONAL SENSECODE field may be used to indicate whether a filemark or setmark was read. Reporting of setmarks is optional andindicated by the RSMK bit for sequential-access devices in the configuration parameters page. (See SSC.)The end-of-medium (EOM) bit is mandatory for sequential-access and printer devices, and this bit is reserved for allother device types. An EOM bit of one indicates that an end-of-medium condition (e.g., end-of-partition,beginning-of-partition, or out-of-paper) exists. For sequential-access devices, this bit indicates that the unit is at orpast the early-warning if the direction was forward, or that the command was not completed becausebeginning-of-partition was encountered if the direction was reverse. (See SSC.)136 dpANS SCSI Primary Commands - 2 (SPC-2)