IOX records represent an input/output (I/O) interruption for a
completed channel program and a summary of a complete channel program
for the I/O operation.
IOX....shhhh ASCB.... hhhhhhhh CPU..... hhhh JOBN.... cccccccc
DEVN.... hhhh SID..... hhhh DRID.... hh
TVSN.... hh ECNO.... hhhh DVCLS... hh
DSTAT... hh AERRC... hh FLAG0... hh
VOLSER.. cccccc UCBTYP.. hhhhhhhh
DSNAME.. cccc.cccccc.cccccc.ccccc
NSSCH... hhhhhhhh DSSCH... hhhhhhhh SDCON... hhhhhhhh
SRPEN... hhhhhhhh SDISC... hhhhhhhh SCUQU... hhhhhhhh
IODTS... hhhhhhhh hhhhhhhh
AONLY... hhhhhhhh DVBSY... hhhhhhhh ICMR.... hhhhhhhh
CCW SECTION SQNO.... hh FGS1.... hh FGS2.... hh
RCNT.... hh BLKR.... hhhh BLKW.... hhhh
BTRD.... hhhhhhhh BTWR.... hhhhhhhh DCHN.... hhhh
CCHN.... hhhh DEGA.... hh DEGE.... hh
DEEE.... hhhh SEEKLOCC hh CCHHR... hh
LROP.... hh LRSECT.. hh LREXOP.. hh
LREXPM.. hhhh
- IOX shhhh
- IOX identifies the beginning of an IOX record where hhhh is the
device number and s is the subchannel set identifier.
- ASCB {hhhhhhhh|U/A}
- One of the following:
- hhhhhhhh
- Address of the address space control block (ACSB) for the address
space that started the I/O operation.
- U/A
- Unavailable because the I/O supervisor block (IOSB) control block
is unavailable.
- CPU hhhh
- Address of the processor on which the interruption occurred.
- JOBN {cccccccc|N/A|U/A}
- One of the following:
- cccccccc
- Name of the job associated with the task that requested the I/O
operation.
- N/A
- Not applicable.
- U/A
- Unavailable because the IOSB control block is unavailable.
- DEVN shhhh
- Device number with the subchannel set identifier when appropriate.
- SID hhhh
- System ID
- DRID hh
- Driver ID from IOSB
- TVSN hh
- Trace version
- ECNO hhhh
- Record count
- DVCLS hh
- Device class
- DSTAT hh
- Device status
- AERRC hh
- Error codes found during CCW analysis. See CCW error codes for
a description.
- FLAG0 hh
- Flag byte
- VOLSER ccccccc
- Volume Serial
- UCBTYP hhhhhhhh
- UCB type
- DSNAME cccc.cccccc.cccccc.ccccc
- 44-byte data set name
- NSSCH hhhhhhhh
- Number of SSCH instructions.
- DSSCH hhhhhhhh
- Number of SSCH instructions for which data was collected.
- SDCON hhhhhhhh
- Summation of device connect times.
- SRPEN hhhhhhhh
- Summation of function pending times.
- SDISC hhhhhhhh
- Summation of device disconnect times.
- SCUQU hhhhhhhh
- Summation of control unit queuing times
- IODTS hhhhhhhh
- Time stamp from IOD
- AONLY hhhhhhhh
- Summation of device active only times
- DVBSY hhhhhhhh
- Summation of device busy times
- ICMR hhhhhhhh
- Summation of initial command response times
- SQNO hh
- Orientation Sequence Number
- FGS1 hh
- Flag byte 1
- FGS2 hh
- Flag byte 2
- RCNT hh
- Count of erase
- BLKR hhhh
- Number of blocks read
- BLKW hhhh
- Number of block written
- BTRD hhhhhhhh
- Number of bytes read
- BTWR hhhhhhhh
- Number of bytes written
- DCHN hhhh
- Number of data chain CCWs
- CCHN hhhh
- Number of COM chain CCWs
- DEGA hh
- Definition of exterior global attribute
- DEGE hh
- Definition of exterior global attribute extended
- DEEE hhhhhhh
- Definition of exterior end of extend CCH
- SEEKLOCC hh
- The command code that performed the seek or locate record operation.
- CCHHR hhhhhhhh
- CCHHR seek or search address
- LROP hh
- The locate record operation code.
- LRSECT hh
- The locate record sector number.
- LREXOP hh
- The locate record extended operation code.
- LREXPM hhhh
- The locate record extended parameters.