IBM 3410 Manual page 40

A c t i o n
X l ( D a t a
S e c u r i t y
E r a s e F a i l u r e )
Provide an operator message, post completion with error condition, and exit to
operating system. See "Terminal Action Ia."
A c t i o n X l l
Post completion with a check condition, and exit to operating system. See
"Terminal Action Ib."
A c t i o n
X l l l
Provide an operator message, post completion with check condition, and exit to
operating system. See "Terminal Action Ib."
Action
XIV (PE ldentification
Burst
Check
On Write,
Write Tape Mark, and
Erase
G " p )
Use a rewind or backspace block command to reposition tape (if a backspace
block is used to backspace into load point, ignore the resulting unit check), and
reissue the command.
For a write command, repeat this procedure until successful or until 14 retries
have been attempted. If the error persists through 14 retries, go to Stepl.
For a write tape mark or erase gap command, repeat this procedure until
successful, or until l5 retries have been attempted. If the error persists through
15 retries, go to Step 2.
Step I
Change the failing write CCw to loop-write-to-read ccw to obtain data for error
recording.
The write CCw must not be command-chained or data-chained from or to any of
the CCWs in the original failing CCw chain. Such a chain could cause tape
movement and destroy previously written data blocks.
Data is recorded after the loop-write-to-read is completed. The failing write CCw
is issued to complete the 15th retry, and the resulting data is recorded if an error
occurs. If an error does not occur, the previous sense data is recorded.
Step 2
Provide an operator message, post completion with error condition, and exit to
operating system. The operator message should indicate that the probable cause
of the permanent error is a bad spot on tape in the area where the PE
identification burst must be written.
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3410/3411 Component Description