Deadstart; Coldstart; Coldstart Of Controllers For 667 Or; 669 Tape Units - Control Data Corporation CYBER 170 Series Operator's Manual

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DEADSTART 2
Deadstart is the process that makes the system oper-
ational and ready to process jobs. System deadstart
requires a certain amount of your intervention.
This manual assumes that a deadstart file exists and is
configured to meet site requirements. The deadstart file is
on a reel of magnetic tape or a disk pack and contains the
programs necessary to establish the operating system and
its products (such as BASIC, FORTRAN, COMPASS, and so
forth) on the system equipment. The same deadstart file
can be used for any supported equipment configuration.
In general, the procedure you use most often to deadstart is
warmstart. Warmstart from mass storage or a 667/669
magnetic tape unit is possible after the disk controller or
tape controller to be used is loaded with the proper
controlware and the controlware is functioning. Warmstart
is always possible from 677/679 tape units.
There are three preliminary procedures that might be
required before performing warmstart.
1.
Coldstart
2.
Loads the tape and/or disk controlware to their
respective controllers.
Loading CTI module to disk
Loads the common testing and initialization (CTI)
module to disk. Doing this procedure enables you
to perform warmstart from mass storage and to
run the off-line maintenance system.
3. Loading DDS module to disk
Loads the deadstart diagnostic sequencer (DDS)
module to disk. Doing this procedure enables you
to run the DDS tests at deadstart time.
If coldstart is required, you must do it before any other
procedure. Loading the CTI module and the DDS module to
disk are optional procedures which each installation may
decide to perform in order to enable the features they
provide.
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A ttempts to perform deadstart from mass
storage could be unsuccessful in
configurations with shared access to
controllers and drives. Conflicts can arise
in both single and multiple mainframe
configurations. In a multi mainframe
configuration, if another mainframe has
reserved the controller or drive, deadstart
delays momentarily until the reservation
is released. In a single mainframe
configuration, if another channel has
reserved the drive, deadstart will be
unsuccessful. In this case, set the
deadstart panel for the other channel.
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The following sUbsections explain these procedures in more
detail. If the procedures are not required, skip to the
subsection entitled Warmstart.
COLDSTART
The coldstart procedures outlined here load the tape and
disk controllers with controlware. The tape controlware
can be loaded from a card reader or a tape uni t depending
on the type of controller.
The 7021 tape controller for a 667 or 669 tape unit requires
controlware loaded from a card reader. The 7152 tape
controller requires controlware loaded from either a card
reader or a tape uni t.
The 7054 and 7154 disk controllers require control ware
loaded from a card reader. The controlware for a 7152 disk
controller and the 7155 disk controller (844-4x and 885 disk
drives) can be loaded from either a card reader or a disk
unit.
The following paragraphs summarize the procedures needed
to perform coldstart. You can use the appropriate
summary as a checklist during deadstart. Detailed
descriptions of all procedures in the deadstart process are
provided throughout the remainder of this section.
This manual assumes that power is applied on all required
equipment and that the equipment is functioning properly.
If at any time the system loses power or the equipment
fails, consult the site analyst or customer engineer.
COLDSTART OF CONTROLLERS FOR 667 OR
669 TAPE UNITS
Coldstart is necessary when deadstarting from 667 or 6691
magnetic tape units if the controlware has not yet been
loaded to the controller. The coldstart procedure contains
a special program that reads the tape controller
controlware, loads it to the controller, and then loads the
deadstart tape.
The following procedure, Coldstart 7021/7152 Tape
Controller from Card Reader, can be used to load either
.the 7021 or the 7152 controller. The procedure coldstart
from tape unit can be used to load only the 7152 controller.
Use the warmstart procedure once the controlware has
been loaded and is functioning properly. Following
coldstart from a card reader, the system loads the
deadstart tape automatically, and warmstart is used for
subsequent deadstarts only. However, following coldstart
from a tape unit, a warmstart must be performed to load
the system deadstart tape.
It is advisable to reset the deadstart panel (refer to Setting
the Deadstart Panel) for a warmstart immediately after a
coldstart if the controlware has been loaded successfully.
After initial loading of the controlware, there is no reason
to p~rform a coldstart again if the tape subsystem is
operating correctly.
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