11-48 Chapter 11
SCSI Peripherals and I/O Information
Figure 11-21 A3542AA3542A Indicator Descriptions
Cartridge Light - Flashes green to show activity, loading, unloading, reading, and writing. It shows
steady green to indicate a cartridge is loaded and the unit is ready.
Clean/Attention Light - Flashes Amber to indicate head cleaning is needed. This is an indication of
an excessive number of Read-After-Write (RAW) or third level error correction (C3 ECC) errors. This
condition can be caused by dirty heads or by a cartridge approaching the end of its life. If the flashing
light reoccurs after the initial cleaning, the data cartridge involved should be removed from use by
reading the data from the tape and copying that data to a new tape. The cleaning needed indication is
only cleared by completing a cleaning cycle, no matter what the cause is, however, the indication does
not stop the activity of the tape unit.
Self-Test - During power-on, the drive executes a self test diagnostic sequence. This is shown by the
left tape /cartridge light flashing green at a rate of one cycle per second. If the self-test fails, the right
clean/attention light shows a steady amber condition.
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