1. Enter the required data immediately following the colon (:). If
you are using a 3210 or a supported CPU display console,
enter the information in the user input area. The information then appears in the output display area on the line fclloving the SET TIME r.equest.
2. You should enter a time value that is some 30 to 60 seconds ahead
of the current time, because CP requests you to press the TOD ENABLE SET switch when setting the clock.
For example, if the date is 03/01/14, and the time will soon be 08:28 (EST), the exchange on a printing terminal looks like this: VERSION 1 LEVEL 0 mm/dd/yy SET DATE 88/DD/YY :03/01/14 SET TI8E HH:88:SS :08:28:00 PRESS "TOD ENABLE SET" KEY AT DESIGNATED INSTANT When you press the TOD ENABLE SET key, CP responds with: NOW 08:28:00 EST FRIDAY 03/01/14 CHANGE TOD CLOCK (YESINO): !Qte: The previous example executed on a display terminal would show
your responses on separate lines. You now have an opportunity to change the value of the clock. If you
enter "no", or press the END function key on the console, clock
initialization ends. If you enter "yes", another series of prompting messages permit you to enter a new date and time. To V8/310 users, the epoch clock value of all zeros
indicates the beginning of the day January 1, 1900. To OS and OS/VS users, the epoch clock value of all zeros represents the beginning of
the day January 1, 1960. Thus, OS virtual machine users will find that
stored clock values differ by 60 years; however, it is possible in OS to
use 1900 as the base epoch clock value.
Cold start procedures are usually invoked only on
operation of a new version of the VM/370 system or
files. as well as accounting records are lost or
because of a hardware error that prevented valid
continuation.
the initial loading
if all closed spool
rendered unreadable system recovery and
Failures in system component power, building power, hardware logic,
the CP program, or some (rare) kinds of user programs can be classified
as system operating procedure errors; all can require that you start the system with a cold start. Some of these malfunctions may require you to
issue the SHUTDOWN command. If the SHUTDOWN co.mand cannot be keyed in,
you can press the LOAD button on the System/310 console. Then after the
appearance of the shutdown message, you should the LOAD button a
second time to reload the system with V8/310. V8/310 issues a message
to you to perform cold start procedures when it recognizes that
unrecoverable errors have occurred.
12 V8/370 Operator's Guide

VM/370 cold start procedures can start after the condition that
caused the System/370 or the operator to abnormally terminate the VM/310 system has been corrected.
If a cold start is required, start it by responding with "cold" to
the following message. hh:mll:ss START «COLDIWARMICKPTIFORCE) (DRAIN» I (SHUTDOWN) :cold
A good practice after an abnormal shutdown and cold start procedure
is for the system operator to incorporate into the LOGMSG the time of
the unplanned shutdown and that a cold start was done. This tells the
user that his spooled files were lost, and that reconstruction of some of his other files may be in order. !Qte: A warm start is the normal procedure used in recovering accounting
data and in order to access previously closed output files. CP informs you when a warm start cannot be done and requests an alternate
recovery method. Warm start implies that the previous VM/370 session ended with an
orderly shutdown procedure. A warm start should be attempted after Vft/370 has abnormally terminated, and after a successful system dump operation. Begin warm start procedures if yeu are not alerted by console messages or visual indications that a checkpoint or cold start
is required. Warm start restores previous spool controls and files;
accounting records remain valid and are to te kept as a base for
continuing operations. In many cases, Vft/310 recovers froll system failures and restarts itself. When this occurs, the following message
occurs at the console: Vft/370 SYSTEM RESTART To begin warm start procedures, key in "war." or simply press the END, ENTER, or RETURN key (depending on the ccnsole device) when the
following message appears at the console:
hh:mm:ss START «COLDIWAR8ICKPTIFORCE) (DRAIN» I (SHUTDOWN): (If you want to free up all unit record devices, specify "drain". You can also specify "warm-drain" to warm start the system and draiQ all
unit record devices, or "shutdown" to close down the system.) The warm start then proceeds as follows: portions of the V8/370 control program (CP) enter real storage and CP then checks the status of the time of day
(TOD) clock. If the clock is not set, CP requests the operator to set
it, as previously described. If the TOD clock is error-free, CP examines each DASD to ensure that the volume labels on all DASD packs
for VM/310 system use are correct. CP determines if the system residence (SYSRES) volume was defined and formatted during VM/370 system generation. CP also determines if the SYSRES volume resides on a device
defined as a component of the real I/O configuration. Label and SYSRES volume residence errors cause error message printing on the system console, and the system startup may abnormally terminate. However, if
CP finds no errors, it begins its recovery activity that is an
investigation of the integrity of the previously stored spooling and
accounting data. Section 2. Initiating V8/310 Operation 13