IBM 3590 - Manual (Page 35)

relative to the beginning and end-of-volume. If the device is rewinding, the
tape-position indicator illustrates the beginning and end-of-tape. Logically
shortened tape is displayed normally, but the rate of change is faster than
normal length tapes.
Dump Icon
The status area of the operator panel displays the dump icon, (see Figure 3 on
page 9).
The dump icon appears when a trace is available and remains on the
screen to indicate that the 3590 stores the trace data. The icon remains
on the screen until the 3590 power is turned off, a dump is read over
a SCSI port, or the dump is written to a tape.
Attention: The dump is lost if you power off the drive.
Clean Icon
The status area of the operator panel displays a clean icon. (See Figure 3 on
page 9.)
When cartridge cleaning is required, the clean icon appears. It
displays in the same position as the dump icon, and the dump icon
overlays it until the CLEAN message displays. This icon alerts the
operator that a cleaning operation is requested.
Chapter 3. Drive Operator Panel and Controls 15