Operation 4-9
Because the forced ejection may interrupt any operation, it is possible that the drive will not write EOD (End of Data) before the cassette is ejected. This will cause loss of data, and result in a cassette with an invalid format. However, it should still be possible to read such a cassette up to the point where the ejection interrupted the writing.
4.If no cassette is loaded in the drive, the DAT AutoLoader assumes that you want to eject the magazine. Following the 35 seconds, it does eject the magazine. The DAT AutoLoader is then reset as though power had been cycled.
IMPORTANT: Forced ejection overrides any SCSI PREVENT MEDIA REMOVAL that may be in effect, and can abort any SCSI operations in which the DAT AutoLoader is engaged.
Modes of Operation
The DAT AutoLoader can operate in either Stacker or Random mode.
Stacker Mode
In Stacker mode (also known as sequential mode), a cassette can be selected using the Select and Enter buttons on the front panel. When a cassette is ejected from the embedded drive after a host UNLOAD command, the DAT AutoLoader automatically moves the next available cassette from the magazine into the drive. In this mode the DAT AutoLoader does not depend on the host computer to send SCSI MEDIUM CHANGER commands to move cassettes to and from the magazine.
Random Mode
The AutoLoader enters this mode when it receives a SCSI MOVE MEDIUM command. The Select button is disabled. The Eject button or SCSI UNLOAD command will cause the AutoLoader to exit this mode.