Initializing an emulated CKD device on a 3370 FBA device

To emulate a CKD device on a 3370 FBA device:

Use ICKDSF to initialize the FBA disk for use. If you have not already done so, initialize the FBA disk with the FBAVTOC in the standard location (FBAVTOC(2,56,1024)) and write a volume label. For an example of initializing, see Figure 1.
Run the format-emulated extent utility (INITEM). For a description, see VSE/ESA System Utilities, SC33-6517.
If it is not already active, activate the Direct Access Storage Compatibility Feature.
Use the ICKDSF INIT command to initialize the emulated CKD disk for use.
For fully-emulated CKD devices, use:
```
 INIT  UNITADDRESS(ccuu) NOVERIFY VALIDATE —
       VOLID(volser) MIMIC(EMUALL) DEVTYPE(type)
```
For partially-emulated CKD devices, use:
```
 INIT  UNITADDRESS(ccuu) NOVERIFY VALIDATE —
       VOLID(volser) MIMIC(EMU(n)) DEVTYPE(type)
```
Usage Notes:
- For type, substitute the device type to be emulated.
- For n, substitute the same number of cylinders that you gave as the size of the sub-disk during the INITEM program/operator dialog. ICKDSF does not check the validity of n.
- INIT writes a special data set control block (DSCB) on the partial CKD device to ensure that the nonexistent cylinders are never accessed.
- The drive test function of the ANALYZE command does not operate on CKD devices being emulated on FBA devices.