Explanation
For the first format of the message, an uncorrectable
input/output error was detected by the I/O supervisor, the basic telecommunication
access method (BTAM), or the telecommunication access method (TCAM)
routine. In systems with the graphics access method (GAM), unit checks
and conditions that require operator intervention indicate devices
that do not exist or that were included at system generation time
but not attached to the system.
For the second format of the
message, the message writer was unable to locate the routine that
builds the device dependent portion of the above message. If the name
of the routine is available, it is included in the message as exitname.
Two
consecutive commas or a field containing blanks or asterisks in the
message text indicates that a field could not be determined or is
contained on the next or previous line of the message. If the sense
data to be inserted in the sens field of the message text exceeds
6 bytes, the sens field and the optional field that follows (dcbctfd
or opxxterm or cylntrck) do not appear on the first line. Consecutive
commas appear instead. The system then issues a second line that
includes the device number of the device, the sense data, and, optionally,
dcbctfd, opxxterm, or cylntrck. In other words, if the sense data
exceeds six bytes, the message has this format:
IEA000I dev,err,cm,stat,,,[ser],jjj
[,hh.mm.ss]
IEA000I dev,,,sens {,dcbctfd|,opxxterm|
,cylntrck}
Because two separate WTO instructions
issue the two messages shown above, it is possible that one or more
unrelated messages could appear between the first message and the
second message.
In the message text:
- dev
- Device number of the device or line address of the telecommunication
device, in hexadecimal. If the error is a channel program check (CPC)
or channel protection check (PRC), this field is zeros; the error
was not caused by a hardware error on the device, but was caused by
the program issuing the I/O.
- err
- Description of the error based on status and sense information:
- DSN - data streaming is not operational.
- RST - the I/O Restart routine was entered by Alternate CPU Recovery,
the Channel Check Handler, or the Missing Interrupt Handler.
- SAF - Staging Adapter failure. The Staging Adapter controlling
the DASD address specified has lost communications with the mass storage
control.
- UEX - unit exception.
MSS users should check the “possible values of err and
appropriate responses” in the Operator Response part
of this message description.
- cm
- Command code, in hexadecimal, of the channel command word (CCW)
being executed when the error occurred. If the channel command word
cannot be found, this field appears as **.
- stat
- Status portion, in hexadecimal, of the channel status word (CSW).
- sens
- The first byte, in hexadecimal, describes a unit check type error
condition (for telecommunication devices). The second byte, in hexadecimal,
contains sense information resulting from the execution of a diagnostic
write/read or read/skip command (from TCAM) which ended with a unit
check status (2701 data adapter unit). For other devices, these same
two bytes appear, in hexadecimal, if a unit check condition is indicated
in the stat field. For devices that give more than two bytes of sense
information, this field also contains the remaining sense bytes, in
hexadecimal. For devices which give more than 6 sense bytes, this
field continues on the second line of the message. For DASD devices,
this field contains the 8 sense bytes for program errors or 24 sense
bytes for equipment and data checks. For the 3340, this field contains
24 sense bytes for seek checks.
The message on the system console
reflects the sense-byte information from the last entry for direct
access devices; the sense-byte information located in the logrec data
set data reflects the data from the initial error condition.
- debctfd
- Record count, in hexadecimal, not including label records. This
field appears only for magnetic tape and indicates the count of the
record preceding the error record.
- opxxterm
- TP operation code, in hexadecimal, describing the type of channel
command word (CCW) being executed when the error occurred. xx is not
used, but is followed by the terminal identification characters, in
hexadecimal. It is either two bytes or one byte, depending on the
terminal type. If it is one byte, it is left justified. If a dial
line is being used with TCAM, the last four digits of the dial number
are provided.
- cylntrck
- Address, in hexadecimal, of the cylinder (cyln), and the track
(trck) where the error occurred. When an error occurs while trying
to obtain this data, the last seek address is substituted. This field
appears only for certain disk and drum direct access device errors.
- ser
- Serial number of the volume on which the error occurred. This
field appears only for magnetic tapes or direct access devices.
- jjj
- Job name. If the error is a channel program check (CPC) or channel
protection check (PRC), this field indicates the program in error.
- hh.mm.ss
- Time that the message was received in hours, minutes, and seconds.
Operator response
For all values of err,
probable hardware error. For magnetic tape devices, proceed with caution
in unconditionally accepting the results of the operation. Check that
tapes being used by this job have not been replaced or removed. Each
message should be considered as a potential attention of a marginal
condition.
For other than magnetic tape devices, note that some
abnormal error condition occurred. Depending on the severity of the
error (check status and sense information) and depending on the installation
requirements, take the appropriate action.
Possible values of
err and
appropriate responses are as follows:
- For MSS users, an attempt has been made to write on a virtual
volume that was specified READ ONLY on the CREATEV command.
- SAF - Staging Adapter failure. Use your path chart to determine
the SSID of the Staging Adapter involved or use 8nn for the SSID,
where nn is byte 25 of the MSS sense data in this message.
Source
Module
Routing code
Descriptor code