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The size of the data component of the Media Database is determined by the calculated values, that is, the number of blocks and the actual block size. These are stored in the CTTMDBD member of the IOA INSTWORK library. The structure of this database member definition is described in the IOADBF utility section of the INCONTROL for z/OS Utilities Guide.
The following space requirements are automatically calculated based on the values you specify in the Control‑M/Tape Media Database Space Calculation screen.
Table 120 Automatically calculated parameters—Data component
Parameter |
Description |
|---|---|
Required blocks |
Number of blocks needed. (The sum of the primary and all secondary extents.) |
Primary |
Number of blocks in the primary extent.
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Secondary |
Number of blocks in each secondary extent.
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Extents needed |
Number of secondary extents needed in addition to the primary extent. |
Actual block size |
Block size of the database file to be used. |
3380 Tracks |
Calculated number of 3380 tracks on the disk, for the data components file. |
3390 Tracks |
Calculated number of 3390 tracks on the disk, for the data components file. |
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