IBM 3590 manual Processor Check Indicator, File Protected Icons, Tape Position Indicator

Processor Check Indicator

The processor check indicator indicates that the model-unique Licensed Internal Code is not following its normal sequence. A symbol that looks like a wrench identifies the Processor Check indicator on the operator panel. See Figure 2 on page 7 definitions for more details.

File Protected Icons

The status icons area of the operator panel displays the file-protected icons (see Figure 3 on page 9).

The file-protected icon (physical) is a read only symbol that is displayed when the thumbwheel on the cartridge is set to the file-protected position.

#	The file-protected icon (logical) is a read only symbol that is displayed
#	when the 3590 receives the Mode Select command from a host
#	program that sets the volume to a logically write-protected state. Both
#	Write Once Read Many (WORM) and Persistent Write Protect status
#	leave a volume logically write-protected on subsequent loads. A
#	subsequent Mode Select turns off a persistent Write Protection, while
#	WORM cannot be turned off. Associated Write Protection persists only
#	while a logical volume is loaded or until a Mode Select changes the
#	protection status. Associated Write Protection status is lost when a
#	volume is unloaded or the device is powered-off. File protection is
#	temporarily inactive during volume loading and unloading when the
#	device updates the volume control region (VCR) on the tape. (During
#	this period of time, the icon reverts to file-unprotected). Refer to IBM
#	3590 High Performance Tape Subsystem Hardware Reference for details.

The file-unprotected icon is a read/write symbol that is displayed when the thumbwheel on the cartridge is set to the not file-protected position.

Tape Position Indicator

If the device is processing, the tape-position indicator provides the operator with a graphical representation of the device’s position. The representation is

143590 Operator Guide