Table of Contents
Advertisement
2803 TAPE CONTROL (Continued)
Sense Byte 1
4
Sense Byte 2
Name
Noise
Status A
Status B
Seven-Track
Load Point
Selected and
Write Status
File Protect
Description
The meanings and responses of status
A and status B are:
Tape
Tape
Tape
Response
Unit
Unit
Unit
to Initial
Status Status Status
Selections
A
B
0
0
Non-
Unit check
existent TU
0
Not ready
Unit check
Ready and
Clear status
not rewind-
ing
Ready and
Busy
rewinding
The selected tape unit has the seven-
track feature installed.
The selected tape unit is at load point.
The selected tape unit is in write status.
The selected tape unit is in the file
protected status.
The selected TU is not compatible.
This sense byte contains the track-in-error indicator bits that are
set at the end of a read, or read backward command if a data check
has been enqountered. Bits 6 and 7 on together indicate either more
than one error or no error found.
Sense Byte 3
Name
R/WVRC
LRCR
Skew
84
S/360
Description
A VRC check occurred during a read
or read backward operation.
Indicator
is not set after an over-run or after
receipt of a stop command.
An LRCR check occurred during write,
write tape mark, read and read back-
ward.
Excessive skew detected during a read
back check on a write, write tape mark
or erase operation.
IBM CONFIDENTIAL
Advertisement
Table of Contents
