Scratch Parameter List (IGGDASCR)

Register 1 contains the address of the scratch parameter list used by IGGDASU3. See Table 1. The address of a list of DASD volumes is also passed to the exit routines in the DASAVOLL field of the scratch parameter list.

Table 1. Scratch Parameter List. Mapped by IGGDASCR.
Offset	Length or Bit Pattern	Name	Description
00 (X'00')	44	IGGDASCR	DADSM scratch parameter list
00 (X'0')	8	DASPLID	ID = 'IGGDASCR'
08 (X'08')	2	DASPVER	Version of parameter list
10 (X'0A')	2	DASPLEN	Length of parameter list
12 (X'0C')	1	DASPKEY	Key of parameter list
12 (X'0C')	xxxx ....	DASPSKEY	Storage key of parameter list
13 (X'0D')	1		Reserved
14 (X'0E')	2	DASHRTCD	DADSM scratch return code
16 (X'10')	4	DASDIAGI	Diagnostic information
16 (X'10')	1	DASERRCD	DADSM scratch error code
17 (X'11')	1	DASSFNID	DADSM scratch subfunction ID
18 (X'12')	1	DASSFRET	Subfunction return code
19 (X'13')	1	DASSFREA	Subfunction reason code
20 (X'14')	1		Reserved
21 (X'15')	1	DASFLAG2	SMS indicator flag
	1... ....	DASSMSMG	System-managed data set
	.1.. ....	DASUNCAT	Uncataloged system-managed data set
	..1. ....	DASCATCL	Catalog is the caller
	...1 ....	DASGDGRO	GDG rolloff in progress
	.... 1...	DASGDGRN	GDG rolloff noscratch
22 (X'16')	1	DASFLAG3	Functionally authorized request flags (Part 1)
	1... ....	DASFAUTH	Caller guarantees functional authorization of request
	.1.. ....	DASSAUTH	Caller guarantees security authorization of request
	..1. ....	DASPROFM	RACF profile managed by caller
	...1 ....	DASBTIOT	Bypass SYSZTIOT ENQ
	.... 1...	DASBDSN	Bypass SYSDSN ENQ
	.... .1..	DASBDEB	Bypass DEB check (DSN not open)
	.... ..1.	DASNVALL	Do not dynamically allocate volumes
	.... ...1	DASNERAS	Do not erase any extents
23 (X'17')	1	DASFLAG4	Functionally authorized request flags (Part 2)
23 (X'17')	1... ....	DASVOLMT	Caller guarantees that the volume is already mounted
24 (X'18')	1	DASFLAG5	Authorization not required request flags
	1... ....	DASOVRPD	Override purge date
	.1.. ....	DASVRFRD	Verify last-referenced-date unchanged (DFSMShsm)
	..1. ....	DASERASE	Erase all extents
25 (X'19')	1	DASFLAG6	Parameter flag byte
25 (X'19')	x... ....	DASSVCEP	If Then 0 Scratch entered with SMS branch entry 1 Scratch entered at SVC entry point
26 (X'1A')	2		Reserved
28 (X'1C')	4	DASUCB	Address of primary mountable UCB. Can be captured or actual below the 16 MB line.
28 (X'1C')	4	DASVDSCB	Address of UCB for a VIO data set
32 (X'20')	4	DASAVOLL	Address of volume list mapped by (IGGDAVLL); see Table 1.
36 (X'24')	4	DASADSN	Address of data set name
40 (X'28')	3	DASREFDT	Reference date to check (DFSMShsm)
43 (X'2B')	1		Reserved