z/OS DFSMS Installation Exits
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File Start on Volume Exit Function-Specific Parameter List

z/OS DFSMS Installation Exits
SC23-6850-01

The following figure is the format of the function-specific parameter list for the File Start on Volume Exit. See Table 1 for a description of the main parameter list.

Table 1. File Start on Volume Exit Parameter List
Offset Length or Bit Pattern Name Description
00 (X'00')   TEPS File-start-on-volume exit parameter list
00 (X'00') 8 TEPSID Control block identifier
08 (X'08') 4 TEPSLEN Length of parameter list
12 (X'0C') 1 TEPSVER Version of parameter list (1)
13 (X'0D') 2   Reserved
15 (X'0E') 1 TEPSSGTY SMS storage group pool type. The value 1 means “general”.
16 (X'10') 6 TEPSFIRST Volume serial of the first volume for the data set if available
22 (X'16') 1 TEPSFLAG1 Flags
  1... .... TEPSSCRTCH Original volume was nonspecific
23 (X'17') 1 TEPSPARP Media position (n). Represents the distance from beginning of the volume to start of the data set.
The following four fields are available only with DISP=NEW.
24 (X'18') 4 TEPSSTORG Address of two-byte length of storage group name followed by name
28 (X'1C') 4 TEPSMGMTC Address of two-byte length of management class name followed by name
32 (X'20') 4 TEPSSTORC Address of two-byte length of storage class name followed by name
36 (X'24') 4 TEPSDATAC Address of two-byte length of data class name followed by name
40 (X'28') 6 TEPSPREVL Volume serial of previous volume. Defined only if the caller is EOV and the current volume is from the same DD statement as the previous volume.
46 (X'2E') 2   Reserved
48 (X'30') 4 TEPSBLKID Address of the four-byte block identifier of the HDR1 label
52(X'34') 6 TEPSKBTRV KB traversed from BOT.
58(X'3A') 2 TEPSMPOS Media position decimal value n, representing the numerator in the fraction n/65535. This fraction represents the ratio of the distance from the beginning of the volume to the current position rounded down to the nearest 1/65535th.
60(X'3C') 3 TEPS4KBYT Bytes written to the volume in 4K increments since volume mounted.

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