Adabas Device Types

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# Adabas Device Types

Device types for Adabas (including user-defined device types) to be referenced in Predict documentation objects must be defined with this function.

During installation of Predict, a device type is specified depending on the operating system:

Device type | Operating system
--- | ---
3380 | z/OS
2564 | WANG/VS
2KB, 4KB | Linux

Predict stores size information of Adabas files and databases in units of blocks. Computation of sizes into units of cylinders is based on the values specified with this function for a device type.

The Maintenance Adabas device types screen is invoked with code A in the Special Functions menu or with the command `SPECIAL DEVICE`.

    16:45:12                *****  P R E D I C T  *****                  2017-06-07
    Plan   0             - Adabas Device Type Maintenance -

                        Function

                        L  List defined device types
                        A  Add device type
                        M  Modify device type
                        P  Purge device type

    Function ..........

    Device type .......

    Database number ... 180    (1-65535)

    Command ===>
    Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
          Help  Next  Stop  Last  LnkEl Flip  Print Impl  AdmFi SelFi Prof  Main

Parameters
Device type | Up to four characters identifying the device. See table above for valid values.
Database number | Database by which the device table is read if Adabas Online Services are installed.

This section covers the following topics:

- Functions

## Functions

### List defined device types - Code L

Lists all device types currently defined in Predict

### Add device type - Code A

A new device type definition can be added. If the device type is a standard SAG device type, all standard values are shown. We recommend not changing these values. If Adabas Online Services are installed, Predict reads the device table of the specified Adabas nucleus.

### Modify device type - Code M

An existing device type definition can be modified. If Adabas Online Services is installed, Predict reads the device table of the specified Adabas nucleus and shows the differences if the device is defined differently in Adabas.

### Purge device type - Code P

Purges device type definitions.

A device type can be purged only if it is not specified as the default device type for Predict with the function General defaults. A device type that has been purged is replaced with the default device type in all databases and files.