Offsets to the volume component sections are zero if there are no statistics available to the component.
| Offsets | Name | Length | Format | Description | |
|---|---|---|---|---|---|
| 0 | 0 | S42VTNXT | 4 | binary | Offset to next volume header section from start of record, including record descriptor word (RDW). |
| 4 | 4 | S42VTSER | 6 | EBCDIC | Volume serial identification. |
| 10 | A | S42VTADR | 2 | binary | Binary device number. |
| 12 | C | S42VTFL1 | 1 | binary | Device descriptor flags. |
S42VTONL |
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| 13 | D | 7 | EBCDIC | Reserved. | |
| 20 | 14 | S42TUNC | 4 | binary | Count of I/O not captured by the VTOC or VVDS component statistics. |
| 24 | 18 | S42VTVDO | 4 | binary | Offset to VTOC Data component section. |
| 28 | 1C | S42VTVDL | 2 | binary | Length of VTOC Data component section. |
| 30 | 1E | * | 2 | EBCDIC | Reserved. |
| 32 | 20 | S42VTVXO | 4 | binary | Offset to VTOC Index component section. |
| 36 | 24 | S42VTVXL | 2 | binary | Length of VTOC Index component section. |
| 38 | 26 | * | 2 | EBCDIC | Reserved. |
| 40 | 28 | S42VTVVO | 4 | binary | Offset to VVDS component section. |
| 44 | 2C | S42VTVVL | 2 | binary | Length of VVDS component section. |
| 42 | 2E | * | 2 | EBCDIC | Reserved. |