Step; Step,Xx; N.step; N.step,Xx - Control Data Corporation CYBER 170 Series Operator's Manual

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7. The system is left in an idle state.
Normal processing may be continued
with an AUTO command. If this is done,
no attempt should be made to later
perform a level
1
or level
2
recovery
unless another checkpoint command is
performed.
During the processing of the checkpoint, the
message
PROCESSING CPn.
is issued at the system control point indicating
which control point is currently being processed (n
is the control point number). Most of the
checkpoint process must be performed in a serial
manner so that occasionally one control point
number may be displayed for a period of time.
This is especially· true of the time-sharing
subsystem if many users were active when the
checkpoint was issued. It is also possible that
under certain circumstances the checkpoint
routine (lCK) will not be able to properly abort a
job (such as one that has NO EXIT selected and is
at MXPS+l priority). If such a job continues
processing after lCK has aborted it, it is then
necessary for the opera tor to abort the job for the
checkpoint to continue. A more desirable
approach to this situation
is
to ensure that jobs
such as PFDUMPs are finished prior to the
checkpoint. For additional information
concerning the CHECK POINT SYSTEM command,
refer to Preparing for Recovery in section
2.
n.DIS.
Calls the job display package (DIS) to an active
control point specified by n. The A and B display
for DIS automatically appear on the left and right
console screen, respectively. Refer to section 5
for complete information concerning the DIS
package.
X.name.
or
X.name(ccc: •• ccc)
or
X.name,xxxxx.
Calls a system program or utility specified by
name to an available control point. If parameters
are to be passed to the program (for example,
PFDUMP or MODUAL), the second form of the
command is used where (ccc ••• ccc) specifies the
parameters. In both the first and second form of
the command, a default field length of 60000
octal is assumed. If a field length different from
the default is required, the third form of the
command is used. The field length is specified by
xxxxx. Only the first
38
characters following X.
are used.
K.ccc ••• ccc.
or
L.ccc ••• ccc.
Allows entry of data ccc ••• ccc in user- or
system-defined CPU buffer for control when K or
L display is active. Refer to section 4 for
information concerning the K and L displays.
UNLOCK.
Unlocks the console keyboard. When this
command is active, the message UNLOCKED
appears in the header of the left screen display.
Although all DSD commands can be entered when
the console is unlocked, the following commands
are restricted to entry only when the console is
unlocked.
BLITZ.
DATE.yy/mm/dd.
DEBUG.
DISABLE, SECONDARY USER CARDS.
DISABLE, VALIDATION.
ENABLE, SECONDARY USER CARDS.
ENABLE, VALIDATION.
ENGR.
FORMAT,xx.
n.OVERRIDE.
STEP.
STEP,xx.
STEP,xx,b,v.
n.STEP.
n.STEP,xx.
n.STEP,xx,b,v.
n.STOP.
TIME.hh.mm.ss.
UNLOAD,xx. (xx specifies a nonremovable
shared mass storage device)
UNSTEP.
All memory entry commands
All
channel control commands
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Always lock the console when the system is being
used in a production environment. However, you
can unlock the console·. to enter the STEP
command if a system failure requiring a recovery
deadstart occurs (refer to Preparing for Recovery
Deadstart in section
2)
or to enter the UNSTEP
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command after a power or environmental
interrupt (refer to appendix F).
LOCK.
Locks the console keyboard. This command
prevents entry of restricted commands (refer to
UNLOCK command for list of restricted
commands). All other DSD commands can be
entered when the console is locked. The console
is normally locked when the system is being used
in a production environment.
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