
CHAPTER 8: Insertion and Extraction Guidelines SDLT 220 and SDLT 320 Design & Integration Guide
8-4 March 2004 81-81148-01
8.1.3 Unloading a Tape
These commands pertain to unloading the data cartridge:
• AT T E N T IO N
• EJECT
• UNLOAD
• UNLOAD and EJECT
• DISABLE EJECT ON SCSI UNLOAD
• ENABLE EJECT ON SCSI UNLOAD
• DISABLE AUTO TAPE THREAD
• ENABLE AUTO TAPE THREAD.
For detailed information about these commands, and for more information about
the General Status Packet shown in Figure 8-1 on page 8-2, refer to the Super
DLTtape™ Interactive Library Interface Specification (6464162-01) document.
Realistic Expectations
The SDLT 220/320 tape drive should typically complete the reset and recovery
process in less than 3 minutes, although it is possible that heroic (extensive) data
recovery retries—in some cases—can take longer. The servo processor can be
reset three times during error recovery, with each reset lasting approximately one
minute. The amount of tape that has to be rewound into the data cartridge affects
recovery time, but a tape drive that has not successfully recovered from its error
state in several minutes requires manual intervention. The data cartridge should be
inspected after a failure to load or unload event.
Comentarios a estos manuales