General Spool Data Management Data Section

Offsets		Name	Length	Format	Description
0	0	R84SDMLN	4	binary	Length of the SDM section.
4	4	R84BUFSZ	4	binary	Spool buffer size.
8	8	R84NBFPG	4	binary	Number of buffers per 4K page.
12	C	R84FDENT	4	binary	File directory entries.
16	10	R84SPDSU	4	binary	Number of spool data sets in use.
20	14	R84JSAMB	4	binary	Number of JSAM buffers.
24	18	R84JSAMT	4	binary	JSAM threshold for JSAM minbuf condition.
28	1C	R84PBUFC	4	binary	Number of protected user spool access method (USAM) buffers in common service area.
32	20	R84PBUFA	4	binary	Number of protected user spool access method (USAM) buffers in AUX.
36	24	R84UPBUF	4	binary	Number of unprotected user spool access method (USAM) buffers per open USAM data set.
40	28	R84MAXB	4	binary	Maximum data bytes in a user spool access method (USAM) buffer.
44	2C	R84DSENT	4	binary	Total number of spool data set description entries.
48	30	R84DSOFF	4	binary	Offset to the first spool data set description entry.
52	34	R84PRENT	4	binary	Total number of spool partition description entries.
56	38	R84PROFF	4	binary	Offset to the first spool partition description entry.
60	3C	R84SUENT	4	binary	Total number of spool space utilization snapshot entries.
64	40	R84SUOFF	4	binary	Address of the first spool space utilization snapshot entry.
68	44	R84STENT	4	binary	Total number of single track table space allocation snapshot entries.
72	48	R84STOFF	4	binary	Offset to the first single track table space allocation snapshot entry.
76	4C	R84IOENT	4	binary	Total number of spool I/O activity — buffers read and written (entries).
80	50	R84IOOFF	4	binary	Offset to the first spool I/O activity — buffers read and written (entry).
84	54	R84BCENT	4	binary	Total number of buffer chaining by spool data set entries.
88	58	R84BCOFF	4	binary	Offset to the first buffer chaining by spool data set entry.
92	5C	R84JSAMU	4	binary	Number of times JSAM buffers were unavailable.
96	60	R84USAMU	4	binary	Number of times user spool access method (USAM) unavailable buffers occurred.
100	64	R84MMENT	4	binary	Total number of minimal/marginal track condition entries.
104	68	R84MMOFF	4	binary	Offset to the first minimal/marginal track condition entry.
108	6C	R84AWBUF	4	binary	Number of AWAITS of buffers during JMF monitoring.
112	70	R84AWEVR	4	binary	Number of AWAITS of buffers since JES3 initialization.