OAM tape volume demount (subtype 87)

Table 1 describes the format of the subtype 87 data section.

Table 1. Format of subtype data section for subtype 87
Offsets	Name	Length	Format	Description
0 0	ST87TDDN	4	EBCDIC	MVS device number that corresponds to the tape drive on which the volume was mounted.
4 4	ST87TDDT	4	EBCDIC	MVS UCB device type associated with the tape drive on which the volume was mounted.
8 8	ST87TVUN	8	EBCDIC	Unit name associated with the tape volume and used to allocate the tape drive.
16 10	ST87VSN	6	EBCDIC	Volume serial number of the tape volume.
22 16	ST87TMT	2	EBCDIC	Tape media type. Value Meaning 02 IBM 3480 Cartridge System Tape. 04 IBM 3480 Enhanced Capacity Cartridge System Tape. 05 IBM High Performance Cartridge Tape. 06 IBM Extended High Performance Cartridge Tape. 07 IBM Enterprise Tape Cartridge 08 IBM Enterprise WORM Tape Cartridge 09 IBM Enterprise Economy Tape Cartridge 10 IBM Enterprise Economy WORM Tape Cartridge 12 IBM Enterprise Extended Tape Cartridge 14 IBM Enterprise Extended WORM Tape Cartridge
24 18	ST87TVT	1	EBCDIC	OAM tape volume type. Value Meaning B Tape volume is a backup volume belonging to an OBJECT BACKUP storage group. G Tape volume is a grouped volume belonging to an OBJECT storage group.
25 19	*	3	binary	Reserved.
28 1C	ST87SGN	8	EBCDIC	Name of the OBJECT or OBJECT BACKUP storage group.
36 24	ST87RC	4	binary	LCS return code.
40 28	ST87RS	4	binary	LCS reason code.
44 2C	ST87FLGS	4	binary	Processing flags. Bit Meaning 0 This request was processed using a tape volume associated with TAPE SUBLEVEL 1. 1 This request was processed using a tape volume associated with TAPE SUBLEVEL 2. 2–31 Reserved.
48 30	ST87TMNT	4	binary	Elapsed time in milliseconds that the tape volume was mounted, measured from the time that the first DFP OPEN macro completed to the time the tape volume was deallocated by an SVC 99 dynamic deallocation request.
52 34	ST87NOW	4	binary	Number of objects written to this tape volume while it was mounted.
56 38	ST87NKBW	4	binary	Number of logical kilobytes of object data written to this tape volume while it was mounted. X'FFFFFFFF' indicates the counter has overflowed.
60 3C	ST87NOR	4	binary	Number of objects read from this tape volume while it was mounted.
64 40	ST87NKBR	4	binary	Number of kilobytes of object data read from this tape volume while it was mounted. X'FFFFFFFF' indicates the counter has overflowed.
68 44	ST87NBW	8	binary	Number of logical bytes of object data written to this tape volume while it was mounted.
76 4C	ST87NBR	8	binary	Number of bytes of object data read from this tape volume while it was mounted
Note: For subtype 87, the total value in fields that refer to "number of kilobytes" or "number of bytes" will be rounded up.