LCS optical write, read, logical delete, physical delete (subtypes 74

Table 1 describes the format of the subtype data section for the following OAM SMF record subtypes:

74: LCS optical write request
75: LCS optical read request
76: LCS optical delete request (logical)
77: LCS optical delete request (physical)

Table 1. Format of the subtype data section for subtypes 74–77
Offsets	Name	Length	Format	Description
0 0	ST74ORMN	16	EBCDIC	OAM request member name. Valid for subtypes 74 and 75.
16 10	ST74OTMN	16	EBCDIC	OAM target member name. Valid for subtypes 74 and 75.
32 20	ST74OLN	8	EBCDIC	Optical library name.
40 28	ST74OLDT	8	EBCDIC	Optical library device type.
48 30	ST74OLDN	4	EBCDIC	MVS device number that corresponds to the optical library.
52 34	ST74ODN	8	EBCDIC	Optical drive name.
60 3C	ST74ODDT	8	EBCDIC	Optical drive device type.
68 44	ST74ODDN	4	EBCDIC	MVS device number that corresponds to the optical drive.
72 48	ST74ODT	1	EBCDIC	Optical drive type: Value Meaning L Optical drive is a library-resident drive. S Optical drive is a stand-alone or operator-accessible drive.
73 49	ST74OVT	1	EBCDIC	Optical volume type Value Meaning B Optical volume is a backup volume belonging to an OBJECT BACKUP storage group. G Optical volume is a grouped volume belonging to an OBJECT storage group.
74 4A	ST74SGN	8	EBCDIC	Storage group name.
82 52	ST74LIQT	4	binary	LCS input-work-queue time. The amount of time in milliseconds that this request has spent on the LCS input-work-queue waiting for processing.
86 56	ST74LDQT	4	binary	LCS dispatcher-queue time. The amount of time in milliseconds that this request has spent on the LCS dispatcher-queue waiting for processing.
90 5A	ST74LEQT	4	binary	LCS execution-queue time. The amount of time in milliseconds that this request has spent on the LCS execution-queue processing.
94 5E	ST74LXQT	4	binary	XCF cross system processing-queue time. The amount of time in milliseconds that this request spent being processed on the XCF cross system queue. For subtypes 76 and 77, this field contains binary zeros.
98 62	ST74OVMT	4	binary	Optical volume mount time. The amount of time in milliseconds that it took to mount the optical disk volume required by this request. This field is valid if bit 1, 2, or 3 in field ST74FLGS is on. This field is valid for subtypes 74, 75, and 77.
102 66	ST74OVDT	4	binary	Optical volume demount time. This is the amount of time in milliseconds that it took to demount the optical disk volume that was mounted prior to mounting the optical disk volume required by this request. The field is valid if bit 3 in field ST74FLGS is on. This field is valid for subtypes 74, 75, and 77.
106 6A	ST74FLGS	4	binary	Processing flags Bit Meaning 0 This request was processed using a mounted optical disk volume and did not require an unmounted optical disk volume to be mounted. Valid for subtypes 74, 75, and 77. Not valid for subtype 76. 1 This request was processed using the opposite side of a mounted optical disk volume. Therefore, this request required the optical disk volume to be turned over in order to access the volume on the opposite side of the mounted volume. Valid for subtypes 74, 75, and 77. Not valid for subtype 76. 2 This request required an unmounted optical disk volume to be mounted and the optical disk drive that was used to process this request was empty at the time of the request. Therefore, this request did not require a mounted optical disk volume to be demounted prior to mounting the required optical disk volume. Valid for subtypes 74, 75, and 77. Not valid for subtype 76. 3 This request required an unmounted optical disk volume to be mounted and the optical disk drive that was selected for this request was full. Therefore, this request required a mounted optical disk volume to be demounted prior to mounting the required optical disk volume. Valid for subtypes 74, 75, and 77. Not valid for subtype 76. 4–31 Reserved.
110 6E	ST74NOBJ	4	binary	Total number of objects in this request. The maximum possible for this field is 280. With 280 object entries, the maximum SMF record size is 32 744 bytes.
114 72	ST74NKBP	4	binary	Total number of kilobytes of object data in this request.
118 76	ST74SOBJ	4	binary	Total number of objects in this request that processed successfully.
122 7A	ST74SKBP	4	binary	Total number of kilobytes of object data in this request that processed successfully.
126 7E	*	14	binary	Reserved.
Note: The following fields (comprising 116 bytes) are repeated for each object in the chained request, that is for the number of objects specified in the ST74NOBJ field. The maximum number of times that the following fields will be repeated is 280. With 280 object entries, the maximum SMF record size is 32 744 bytes.
140 8C	ST74COLN	44	EBCDIC	Collection name.
184 B8	ST74OBJN	44	EBCDIC	Object name.
228 E4	ST74OLEN	4	binary	Object length.
232 E8	ST74OOFF	4	binary	Object offset. Valid for a subtype 75 partial object read.
236 EC	ST74VSN	6	EBCDIC	Volume serial number.
242 F2	ST74OMT	2	EBCDIC	Optical media type: Value Meaning 01 IBM 3995 5.25-inch 650-MB rewritable optical disk media. 03 IBM 3995 5.25-inch 650-MB WORM optical disk media. 11 IBM 3995 5.25-inch 1300-MB rewritable optical disk media. 13 IBM 3995 5.25-inch 1300-MB WORM optical disk media. 15 IBM 3995 5.25-inch 1300-MB CCW optical disk media. 21 IBM 3995 5.25-inch 2600-MB rewritable optical disk media. 23 IBM 3995 5.25-inch 2600-MB WORM optical disk media. 25 IBM 3995 5.25-inch 2600-MB CCW optical disk media. 31 IBM 3995 5.25-inch 5.2-GB rewritable optical disk media. 33 IBM 3995 5.25-inch 5.2-GB WORM optical disk media. 35 IBM 3995 5.25-inch 5.2-GB CCW optical disk media. Note: CCW = continuous composite WORM media. WORM = write-once-read-many.
244 F4	ST74OTKN	4	binary	Object volume location token.
248 F8	ST74RC	4	binary	LCS return code.
252 FC	ST74RS	4	binary	LCS reason code.

Although subtypes 74–77 share a common subtype data section, not all fields are valid for each of the four subtypes. Table 2 identifies which fields in the OAM subtype data section are valid for each of the four subtypes.

Table 2. Valid subtype data section fields for subtypes 74–77
Field name	Optical write request subtype 74	Optical read request subtype 75	Optical delete request (logical) subtype 76	Optical delete request (physical) subtype 77
ST74ORMN	X	X
ST74OTMN	X	X
ST74OLN	X	X	X	X
ST74OLDT	X	X	X	X
ST74OLDN	X	X	X	X
ST74ODN	X	X		X
ST74ODDT	X	X		X
ST74ODDN	X	X		X
ST74ODT	X	X		X
ST74OVT	X	X	X	X
ST74SGN	X	X	X	X
ST74LIQT	X	X	X
ST74LDQT	X	X
ST74LEQT	X	X		X
ST74LXQT	X	X
ST74LVMT	X	X		X
ST74LVDT	X	X		X
ST74NOBJ	X	X	X	X
ST74NKBP	X	X	X	X
ST74FLGS	X	X	X	X
ST74SOBJ	X	X	X	X
ST74SKBP	X	X	X	X
ST74COLN	X	X	X	X
ST74OBJN	X	X	X	X
ST74OLEN	X	X	X	X
ST74OOFF		X
ST74VSN	X	X	X	X
ST74OMT	X	X	X	X
ST74OTKN	X	X	X	X
ST74RC	X	X	X	X
ST74RS	X	X	X	X