User's Guide

SDLT 220 and SDLT 320 Design & Integration Guide CHAPTER 2: General Drive Specifications
81-81148-01 March 2004 2-25
2.9.2 Error Reporting (for Cleaning)
NOTE: Use the SDLT Cleaning Tape if cleaning is indicated
through your backup software or when the yellow alert
light is ON. Do not clean the drive unless the drive
specifically indicates cleaning is necessary.
How the Tape Drive Returns Cleaning Status
The General Status Packet, accessible through the RS422 serial interface, contains
three unique bits that communicate cleaning information for the drive. Refer to the
Super DLTtape Interactive Library Interface Specification for details. They are:
• Cleaning Requested
When this bit is set, it tells the library to cycle a cleaning cartridge through the
tape drive at the next possible opportunity. The Cleaning Requested bit always
sets in conjunction with the Cleaning Required bit (described next).
• Cleaning Required
When this bit is set, it tells the library that it is necessary to cycle a cleaning
cartridge through the tape drive before attempting any further tape operation.
• Cleaning Tape Expired
When this bit is set, it indicates that the current cleaning tape has exceeded its
use count. This bit is valid only in the following context:
 After attempting a cleaning application.
 Until the next cleaning tape is inserted.
 Until the power is cycled.