Modifying The Iprdeck; Initializing The System - Control Data Corporation CYBER 170 Series Operator's Manual

After completing
all
CMRDECK modifications, you can
also modify the IPRDECK being used. The specific
IPRDECK to be used, if other than default, is specified in
the CMRDECK IPD entry as described previously. The
IPRDECK contains installation parameters which describe
the mode of system operation.
It
is important to note that
nearly all IPRDECK entries are also valid DSD commands.
Therefore, IPRDECK modification is seldom required
during deadstart since DSD com mands can be used to make
the same changes during normal system operation as the
need arises. Installation parameters changed during normal
I
system operation (via DSD commands or modification of
the IPRDECK) are retained only across a level 3 recovery
deadstart. All valid DSD commands are described in
section 3 of this manual.
If it is necessary to modify the IPRDECK, continue with
the next section (Modifying the IPRDECK). Otherwise, to
indicate that all modifications to the CMRDECK and/or
IPRDECK have been completed, type
GO.
and press CR.
MODIFYING THE IPRDECK
When the CMRDECK or CMRINST is currently being
displayed, type
NEXT.
and press CR to modify the IPRDECK. An instruction
display entitled IPRINST then appears on the console
screen(s). All valid IPRDECK entries are defined in this
display. Most of these entries are also valid DSD
commands. To view the contents of the IPRDECK being
used, press the right blank key. The display alternates each
time the right blank key is pressed. If either the IPRDECK
or IPRINST overflows two screens, the display can be
advanced by pressing the + key.
Modify the IPRDECK by entering the appropriate changes
or additions fr!Jm the console keyboard. These entries can
be made when either IPRINST or IPRDECK is being
displayed. Each console. entry supersedes the value
currently specified in the IPRDECK.
I
NOTE
I
The modified IPRDECK remains in effect
only until the next level 0, 1, or 2
deadstart is performed. Changes to the
IPRDECK are retained if a level 3
recovery deadstart is performed.
For complete information concerning IPRDECK entries,
refer to the NOS Installation Handbook and also section 3
of this manual (DSD commands).
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To indicate that modifications to the CMRDECK and/or
IPRDECK have been completed, type
GO.
If a level 0 or level 2 deadstart is being performed, the
system library is automatically loaded from the deadstart
file to each mass storage device specified as a system
device. If no system device was specified, the system is
loaded on the first nonremovable mass storage device in
the EST.
If a level 1 or level 3 recovery deadstart is specified, the
system library is not reloaded. In this case, the deadstart
file is rewound and is not accessed again until another
deadstart operation is performed. The system library is
recovered from checkpoint information on mass storage.
Central memory resident (CMR) tables such as the file
name table (FNT), equipment status table (EST), and track
reservation table (TRT) are either recovered from
checkpoint information for level 1 or from central memory
(and the link device, ECS, if in multimainframe mode) for
level 3.
If a deadstart error occurs, a message appears on the right
console screen and, depending upon the nature of the error,
deadstart processing may halt. Refer to Error Processing
at the end of this section for complete information and
corrective action. In addition, if the system is being loaded
(level 0 or 2 only), the name of each system library
program is also displayed on the right console screen as it
is being loaded. This allows you to monitor deadstart
progress.
The left console screen contains the message ENTER DATE
YY /MM/DD and indicates that you can begin system
initialization (refer to Initializing the System later in this
section). System initialization can be performed while the
system is being loaded.
INITIALIZING THE SYSTEM
Each time a system deadstart function is performed, it is
necessary to initialize the system. Essentially, this
consists of entering the current date and time. The system
uses the date and time (updated every second) for dayfile
messages and to update permanent file catalogs and
directories for files being accessed. This includes the
creation, last modification and last access date and time
for each permanent file in the system. Thus, it is
extremely important to enter the correct date and time in
order to accurately maintain these system records. If a
level 3 recovery deadstart is being performed, it is possible
to recover the date and time from the previous system
deadstart. However, this is not recommended since the
new date and time recorded for system records would no
longer be accurate.
When the system loading (or recovery) phase of deadstart is
about to begin, the following one-line message appears in
the center of the left console screen and requests entry of
the current date.
ENTER DATE YY /MM/DD.
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