Concurrent copy SMF type 42 subtype 4 records

The concurrent copy header section starting at the offset contained in SMF42CCO provides information about the concurrent copy session:
Table 1. Record layouts for subtype 4

Offsets
Dec.  Hex

 Name Length Format Description
The following relate to a concurrent copy (CC) session:
0     0 S42CCID 4 binary Logical session ID.
4     4 S42CCRQS 2 EBCDIC Session type: CC indicates concurrent copy.
6     6 S42CCTS 1 EBCDIC Termination status of the session (N = normal termination, A = abnormal termination).
7     7 1 Reserved.
8     8 S42CCJNM 8 EBCDIC Jobname that requested the CC session.
16   10 42CCJNO 8 EBCDIC JES number of the job that requested the CC session.
24   18 S42CCSST 8 binary The time (TOD timestamp) that the CC session started.
32    20 S42CCEIT 8 binary The TOD that initialization completed for the CC session.
40     28 S42CCSET 8 binary The TOD that the concurrent copy session ended.
48     30 S42CCSSO 4 binary Offset to header information for the first subsystem in the CC session.
52     34 Schussing 2 binary Number of subsystems involved in the CC session.
54     36 S42CCSSL 2 binary Length of the SSID header.
56     38 8 Reserved.
The following relate to the storage subsystem:
0     0 S42CSNXT 4 binary Offset to the next SSID header (0 if last SSID).
4     4 S42CSID 2 binary SSID.
6     6 S42CSIDP 1 binary Storage control session ID.
7     7 1 Reserved.
8     8 S42CSMSF 4 binary Maximum track threshold that was held in the storage control sidefile for the CC session.
12     C S42CSVLO 4 binary Offset to first volume in the CC session for this SSID.
16     10 S42CSVLN 2 binary Number of volumes in the CC session associated with this SSID.
18     12 S42CSVLL 2 binary Length of the volume section.
20     14 4 Reserved.
The following relate to volumes associated with the SSID in the previous section:
0     0 S42CVLNX 4 binary Offset to next volume for the subsystem (0 if last volume for the subsystem).
4     4 S42CVLSR 6 EBCDIC Volume serial number for the volume.
10     A 2 Reserved.
12     C S42CVLDV 1 binary Device type (UCBTBYT4) for the volume.
13     D S42CVLUA 3 EBCDIC Unit address (UCBNAME) for the volume.
16     10 S42CVLTK 4 binary Number of tracks DFSMSdss requested to be processed on the volume.
20     14 S42CVLRD 4 binary Number of tracks read directly from the volume.
24     18 S42CVLRS 4 binary Number of tracks changed since the logical complete message was issued but before DFSMSdss read the tracks (tracks buffered in a sidefile).
28     1C S42CVLEP 4 binary Number of I/Os used to read data from the volume for the session.
32     20 4 Reserved.
The following relate to an EAV Concurrent Copy Session:
0     0 S42VCID 4 binary Logical Session ID.
4    4 S42VCRQS 3 EBCDIC Request type, 'VCC' = Virtual Concurrent Copy.
7    7 S42VCTS 1 EBCDIC Termination status of the session (N = normal termination, A = abnormal termination).
8    8 S42VCJNM 8 EBCDIC Jobname that requested the CC session.
16    10 S42VCJNO 8 EBCDIC JES number of the job that requested the CC session.
24    18 S42VCSST 8 binary The time (TOD timestamp) that the CC session started.
32    20 S42VCEIT 8 binary The TOD that initialization completed for the CC session.
40    28 S42VCSET 8 binary The TOD that the concurrent copy session ended.
48    30 S42VCCTK 4 binary Total number of tracks using CC.
52    34 S42VCVTK 4 binary Total number of tracks using VCC.
56    38 S42VCDSP 4 binary Total number of tracks stored in dataspaces.
60    3C S42VCSSO 4 binary Offset to header information for the first sybsystem in the CC session.
64    40 S42VCSSN 2 binary Number of subsystems involved in the CC session.
66    42 S42VCSSL 2 binary Length of the SSID header.
68    44   8   Reserved.
The following relate to an EAV Concurrent Copy SSID Header Section:
0    0 S42VSNXT 4 binary Offset to the next SSID header (0 if last SSID).
4    4 S42VSID 2 binary SSID.
6    6 S42VSIDP 1 binary Storage control session ID, 0 if all extents copied using CC.
7    7   1   Reserved
8    8 S42VSMSF 4 binary Maximum track threshold that was held in the storage control sidefile for the CC session.
12    C   8   Reserved
20    14 S42VSVLO 4 binary Offset to first volume in the CC session for this SSID.
24    18 S42VSVLN 2 binary Number of volumes in the CC session associated with the SSID.
26    1A S42VSVLL 16 binary Length of the volume section.
  4   Reserved.
The following relate to an EAV Concurrent Copy Volume section:
0    0 S42VVLNX 4 binary Offset to next volume for the subsystem (0 if last volume for the subsystem).
4    4 S42VVLSR 6 EBCDIC Volume serial number for the volume.
10    A   2   Reserved.
12    C S42VVLDV 1 binary Device type (UCBTBYT4) for the volume.
13    D S42VVLUA 3 EBCDIC Unit address (UCBNAME) for the volume.
16    10 S42VVCTK 4 binary Number of tracks processed on the volume using CC.
20    14 S42VVVTK 4 binary Number of tracks processed on the volume using VCC.
24    18 S42VVVRD 4 binary Number of VCC tracks read directly from DASD.
28    1C S42VVLRD 4 binary Number of tracks read directly from DASD.
32    20 S42VVLRS 4 binary Number of tracks read from storage control buffers.
36    24 S42VVLEP 4 binary Number of EXCPs.
40    28 S42VVLUX 4 EBCDIC Unit address (UCBNAME).
Parent topic: Concurrent copy information in SMF type 42 records