ARCSAEXT—Data Set and Processing Information Area

The address at offset 8 of the parameter list points to the address of the 164-byte data set and processing information area in Table 1. This data area applies only to system-managed data sets.

Table 1. ARCSAEXT Data Set and Processing Information Area

Offset	Length or Bit Pattern	Description
00 (X'00')	1... .... .1.. .... ..1. .... ...1 ....	The process is migration. The process is delete if backed up (DBU). The process is delete by age (DBA). The process is backup.
01 (X'01')	3	Reserved.
04 (X'04')	1 flag byte: 1... .... .1.. .... ..1. .... ...1 .... .... 1... .... .1.. .... ..1.	The data set does not have a data set VTOC entry. The data set does not have a VVR entry. The data set has a duplicate VVR entry. This is the data component of a VSAM data set. This is the index component of a VSAM data set. This is an alternate index of a VSAM data set. This is an alternate index with the upgrade attribute.
5 (X'05')	1 flag byte: 1... .... .1.. .... ..1. .... ...1 .... .... 1... .... .1.. .... ..1. .... ...1	This is a VSAM key-sequenced data set. This is a VSAM entry-sequenced data set. This is a VSAM relative-record data set. This is a VSAM linear data set. This is a generation data set. This is a VSAM key-range data set. This is the first segment of a VSAM key-range data set. This is a temporary data set.
6 (X'06')	2	Reserved.
8 (X'08')	1 H M N	Status of a generation data set (character). Active generation data set. Rolled-off generation data set. Deferred generation data set.
9 (X'09')	1	Reserved.
10 (X'0A')	2	Length of the base cluster name.
12 (X'0C')	44	Base cluster name.
56 (X'38')	2	Length of the management class name.
58 (X'3A')	30	Management class name.
88 (X'58')	2	Length of the storage class name.
90 (X'5A')	30	Storage class name.
120 (X'78')	2	Length of the data class name.
122 (X'7A')	30	Data class name.
152 (X'98')	8	Last backup date (microsecond clock format).