Message life cycle rules – IBM 3590 User Manual

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FID 2

FID 3

FID 4

Note:

“Message Life Cycle Rules” describes the priority relationships between
individual Routine Messages.

Message Life Cycle Rules

“Message life cycle rules” are the rules that govern creating, replacing,
displaying, storing, and deleting messages.

FID 1:
v Creation: A FID 1 is created when the model-unique Licensed Internal Code

detects a permanent error that removes the device from the customer’s
application and which will require operator action or service representative
maintenance before the device is again available. FID 1 messages can be
replaced by other FID 1 messages.

v Displayed: FID 1 messages are displayed when created. All FID messages

will have the form “FID n mm”, where n is 1 through 4 and mm is the
specific FID code.

v Deletion: FID 1 messages are deleted during the power cycle. If a FID 1

message displays, and the Enter button is pressed, the FID 1 message
deletes. Also, new FID 1 messages delete old FID 1 messages.

Attention Messages:
v Creation: When the model-unique Licensed Internal Code detects an error

that the operator of the device can fix, it creates an Attention message. An
example is an ACF error that requires the tape to unload. Attention
messages are ATTN DRV and ATTN ACF.

v Stored: When a FID 1 message overlays an Attention message, the code

stores the Attention message. When the code deletes the displayed FID 1
message, it displays the stored Attention message.

v Deletion: An Attention message is deleted when the Enter key is pressed or

when power is cycled. Pressing the Reset button deletes it. The Attention
message generates again if the condition has not been resolved.

Routine Messages—Mount:
v Creation: A Mount message is created when a SCSI Display Message

command is received that requests a Mount message. If a cartridge is
loaded in the drive, it ignores the Mount message.
If a Mount message is received while an earlier Mount message exists, the
second Mount message replaces the earlier one.
This command also deletes any General messages and deletes the mount
portion of previous Demount/Mount messages.

3590 Operator Guide