DCB/DEB Section (tape and DASD)

This section contain portions of the DCB and DEB, including:

Offsets		Name	Length	Format	Description
244	F4	SMFDCBOR	2	binary	Data set organization being used. This field is mapped by DCBDSORG in the DCB mapping.
246	F6	SMFDCBRF	1	binary	Record format. This field is mapped by DCBRECFM in the DCB mapping.
247	F7	SMFDCBMF	2	binary	Type of I/O macro instruction and options. This field is mapped by DCBMACRF in the DCB mapping.
249	F9	SMFDCBFL	1	binary	Indicator used by the OPEN, CLOSE, EOV routines such as the type of the last I/O operation. This field is mapped by DCBOFLGS in the DCB mapping.
250	FA	SMFDCBOP	1	binary	Option codes used by access-method interfaces. This field is mapped by DCBOPTCD in the DCB mapping.
251	FB	SMF14RV2	1	binary	Reserved.
252	FC	SMFDEBFL	1	binary	Data set and device status indicator. This field indicates whether a data set is modified, new or old, and shows the status of DASD. This field is mapped by DEBOFLGS in the DEB mapping. For information about DEBOFLGS, see z/OS DFSMSdfp Diagnosis.
253	FD	SMFDEBOP	1	binary	Indicator showing both the method of I/O processing and the disposition that is to be performed when an end-of-volume (EOV) condition occurs. This field is mapped by DEBOPATB in the DEB mapping.
254	FE	SMFDEBVL	2	binary	Volume sequence number. For direct access, the sequence number is relative to the first volume of the data set. For tape, the sequence number is relative to the first volume processed. This field is valid only for sequential data sets. This field is mapped by DEBVOLSQ in the DEB mapping.

The following 16 bytes apply to the DCB/DEB Tape extension. If you coded DSECT=YES when calling the IFGSMF14 macro, then it generates a DSECT statement at this point with the DSECT name with "TDDEX" appended to it. For example, if you did not code a label on the IFGSMF14 call, the name of this DSECT will be IFGSMFTDDEX.

Offsets		Name	Length	Format	Description
256	100	SMFDCBBL	4	binary	Block count for each volume. For PDSE data sets, this field will always contain X'0'. This field is mapped by DCBBLKCT in the DCB mapping.
260	104	SMFDSSNO	6	EBCDIC	Data set serial number. For PDSE data sets, this field will always contain X'0'. This field is mapped by UCBFSER in the UCB mapping.
266	10a	SMF14RV3	2		Reserved.
267	10B	SMF14TDA	1	unsigned	Tape DS authorization flags.
268	10c	SMF14OPD	4	packed	Date when the data set was opened, in the form 0cyyddF.

The following 16 bytes apply to the DCB/DEB DASD extension:

Offsets		Name	Length	Format	Description
256	100	SMF14NTU	4	binary	Relative track and record of the last user block in the form of TTR0, if a basic format data set. Relative track and record of the last user block in the form of TTTR, if a large format data set. For extended data sets, this field will accumulate the number of tracks used across all the volumes (TTTT).
260	104	SMF14NTR	4	binary	Number of tracks released by the DADSM routine. For PDSE data sets, this field will always contain X'0'.
264	108	SMF14NER	1	binary	Number of extents released by the DADSM routine. For PDSE data sets, this field will always contain X'0'.
265	109	SMF14EDI	1	binary	Enhanced Data Integrity (EDI) flag indicator. Bit Meaning when set 0 Data set name found in EDI exclusion table. 1 Data set being opened for output but is currently open for output. 2 Data set being opened for input but is currently open for output and the data set is not excluded from EDI processing.. 3 Application requested EDI processing be bypassed and the data set is not excluded from EDI processing.. 4–7 Reserved.
266	10A	SMF14FG1	1		Flag byte. Bit Meaning when set 0 Large format data set. SMF14NTU is in TTTR format. 1 EAV BAM detected one or more EXCP or XDAP issuances-DEB2XEXCP flag is on. 2–7 Reserved.
267	10B	SMF14RV4	1		Reserved.
268	10C	SMF14OPD	4	packed	Date when the data set was opened, in the form 0cyyddF.