Some 33XX DASD identify themselves to EREP via physical IDs, identifiers assigned to the storage control unit (SCU), the controller, and the device.
Other 33XX DASD are identified by the physical and logical controller-unit addresses (CUAs).
The sources of these different identifiers are as follows:
| IDENTIFIER | DESCRIPTION |
|---|---|
| physical ID | Is located in the sense records created for 3375, 3380, and 9345 devices and 3880, 3990, 9341, and 9343 storage controls. |
| manufacture serial number | Is located in the sense records for the 3390 and 9345 devices and the 3990, 9341, and 9343 storage controls. |
| secondary control unit address (SCUA) | Is located in the OBR or MDR record. It is the logical address from which the sense data is received. |
| primary control unit address (PCUA) | Is the address of the physical device via the base (primary) channel. This is the position of the drive in the string. The PCUA is also the physical address for all demountable DASD. |
Some EREP reports show 33XX DASD by physical ID. In those that do not, the address shown is the PCUA. See DASDID Control Statement for more information about the physical ID.
In the system summary and trends reports, 33XX devices providing physical IDs are only listed by those IDs; the CPU identifiers are omitted.
Devices having physical IDs do not require DASDID or SHARE statements.