IBM T200F manual

The Volume Label Fields Valid (VolValid) bit is set if the Volume Label being reported is valid.

The Volume Label field reports the volume label if a cartridge is loaded in the drive and Volume Label Fields Valid is set.

The Current Wrap reports the physical wrap of the tape. The least significant bit reflects the current physical direction. A 0 means the current direction is away from physical beginning of tape. A 1 means the current direction is towards physical beginning of tape.

Relative LPOS reports the current physical position on tape.

SCSI Address reports the SCSI Bus Address for the drive. Values returned range from 00h to 0Fh.

This Reserved field may contain a value passed across the RS-422 serial interface by, for example, a tape library if the library vendor chooses to send such a value. The value passed from across the RS-422 interface is reported persistently until a different value is sent, at which time the new value is reported persistently.

62Ultrium Internal Tape Drive and 3580 Ultrium Tape Drive: SCSI Reference