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	Appendix					   Maxc Operationsy756qk40(0,4233)(1,13053)\f5b1f0i8f5I23f1B
Odd Heading: qk40(635)
Maxc Operations	Appendixy756qk40(0,15875)(1,65535)\f5b16f0i8f1BI
MAXC Room Power Down/Up Procedurey648x6(635)\f9b
by Ron Weaverz18697e24(0,5152)\f6b
OCTOBER 1980
(Revised April 24, 1984)
Filed on [Indigo]<Maxc>MaxcOpsPowerDownUp.Bravoz18697e24\f7b13Bi24I48b
Abstract: This procedure itemizes the chronological steps necessary to systematically shut down the power in the Maxc room when a known power outage is scheduled.	z18697x6e54j\f6b10B152f0 1f6
EMERGENCY shutdown procedure (for fire or smoke) may be found in Appendix A.	z18697x6e12j(635)\f6b10B66f0 1f6
A version of this procedure will appear in the Maxc Operations manual.	z18697x6e12j\f6 47i16I7f0 1f6
XEROXz18697l10230y144\f2 5f7b
PALO ALTO RESEARCH CENTER
3333 Coyote Hill Road / Palo Alto / California 94304l10239(2116)\f6b26f7
1. Prior to Shutdowny720x6e36k792(635)\f5b
In order to give users adequate notice and to protect files on disk, Tenex should ordinarily be stopped in the following manner.	d3705x6e10jk40
	Forty-eight hours prior to the scheduled power outage send a message to the NCC Coordinator and the Arpanet liaison at SCI via their Arpanet mailboxes CONTROL@BBNC and Green@SCI-ICS stating the period the power will be off and that the IMP will be affected.  If the scheduled power outage is to take place in less than 48 hours then the NCC Coordinator may be reached direct by phone: (617) 661-0100.  The controller may wish you to call him just prior to taking the system down so you can set some switches on the IMP panel.	

	As long as possible before the scheduled downtime (preferably 24 hours or more), notify users by (optionally) putting a notice in the login message, setting the system downtime cell and recording a telephone message.  	x6e10jk40
A.	To put a notice in the login message, login as yourself and:	x6e10jk40
@SNDMSG<cr>
To: SYSTEM<cr>
cc:<cr>
Subject: Scheduled downtime<cr>	
Message:
(An appropriate message giving date, time, and reason)	
^Z
Q,S,?,carriage-return:<cr>
SYSTEM -- ok	
@l5468x6e10jk40\1u10U5u10U4u4U10u22U67u2U23u4U
B.	To set the system downtime cell, you must be a wheel or a maintenance person:	x6e10jk40
@ENABLE<cr>		(only if you are a wheel)	
!HALT,<cr>		(do not omit the comma)	
[Superpassword:]GUESS<cr>
!!AT mm/dd/yy/ hh:mm<cr>					(date & time system going down)
!!UNTIL mm/dd/yy hh:mm<cr>					(date & time coming back up)
!!DUE (TO REASON) reason (type ? for list)<cr>	
!!<cr>
!l5468x6e10jk40\1u10U3i4I14i5I4u9U6i3I34u9U3u22U39u24U36u22U18u4U4u4U
C.	To record a telephone message, go to the recording telephone (next to the Imp in the back room) and follow the instructions posted there.	x6e10jk40
2.  System Shutdown	x6e12jk40\f5b19f0B
	General Methodology:	
		(1) Shut down software systems cleanly	
		(2) Safeguard rotary storage by spinning down all disk drives	
		(3) Get all other power off in the simplest manner possible so that restart can be accomplished
		    without an excessive current surge.	x6e12jk40\1i20I1i41I1i64I1i140I
	Maxc	x6e12jk40\b5B
The system will automatically start notifying users of the impending downtime beginning one hour before it is to occur.  When the zero hour arrives, all jobs will be forcibly logged out except any job logged in on the Maxc controlling terminal, new logins will be prevented, and "Shutdown Complete" will type out on the Maxc console.  If there are now no jobs logged in, Tenex will shortly hit a BUGCHK (EDDT breakpoint) at SWHLT1, at which point Tenex is properly halted.	l5468x6e6jk40
If there is a job logged in on the Maxc controlling terminal, it will be necesary to halt Tenex manually.  To do this (for which you must be a wheel):	l5468x6e6jk40\143i5I
@ENABLE<cr>
!QUIT<cr>
.Halt Tenex.	l6703x6e12jk40\1u10U2u8U2u1U9u1U
Wait for the EDDT preakpoint at SWHLT1.  A message such as "$8B>>CHKADR BUGCHK/ SWHLT1" should be printed out.	l5468x6e6jk40
Once the Maxc2 system have halted you may proceed by stopping the rest of the systems in the Maxc room.	l5468x6e6jk40
	Alpine
		Boot Dorado.  (Really!)	
x6e12jk40\b7B17i9I
	Ivy
		 From an Alto or DLS terminal:	x6e12jk40\1b3B
Chat Ivy<cr>	
Ena<cr>			NOTE 1:	You must be an Ivy wheel.	
Halt<cr>
Quit<cr>l5468x6e6jk40\24bi7BI20i5I
	Twinklex6e12jk40\1b7B
Ctrl-Shift-D		(to turn on display)	
Position cursor over "gateway" window, press down middle button, select "gateway" menu, let up button.
Press down middle button, select "quit" item, let up button.	l5468x6e6jk40
	DLSx6e12jk40\1b3B
Quit<cr>l5468x6e6jk40
3.  Removing System Power	x6e12jk40\f5b25f0B
	Maxc Disk Drives	x6e12jk40\1b16B
Turn off Front switch first, then the switch in the rear.	l5468x6e12jk40
NOTE 2:	An alternate procedure, (which is not advised due to the fact that some
				circuit breakers may be in the off state prior to shutdown for some reason,
				and the difficulty in correctly identifying all of them may lead to errors
				when restoring power) instead of turning off the switch in the rear of each
				disk drive, is to wait until everything else in this section has been done and
				then throw all the circuit breakers on the Maxc, Maxc-A and Maxc-B Circuit
				Breaker Panels, noting carefully the ones which are already off.	l6703x3e12jk40\bi8f1BI34ui3UI456i16I1i30I1f0
	Maxcx6e12jk40\1b4B
Press middle blank button then type	
3301P
M.
With the left mouse button successively select the menu items "Power Off" and	
"Both".l5468x6e12jk40
			NOTE 4:	(The message "Processor locked on" will appear.  Just shut off the	
						processor power supply manually.  The automatic power-off									circuitry is missing.)	l5468x6e12jk40\3bi7BI1f1 131f0 8f1 23f0
Spin down ALTO disk	
Throw CKT breaker on front of Processor	
Throw CKT breakers on all power supplies (front).	
Pull 20 amp CKT breaker on panel above ALTO.	l5468x6e12jk40
	Twinkle	x6e12jk40\1b7B
Spin down disks (wait until they stop)	
Pull out upper blower drawer and turn off switch inside top left.	l5468x6e12jk40\16i22I
	Alpinex6e12jk40\1b6B
Spin down disks (Dorado T-80 and T-300 #1).	
Power down Dorado as for any Dorado.	
Turn off T-80 and T-300 disk power switches.	l5468x6e12jk40
	Ivyx6e12jk40\1b3B
Spin down disks (ALTO & six Trident disks)	
Turn off ALTO power switch	
Turn off T-80 & T-300 disk power switches (in rear, or see NOTE 2 on page 3)	l5468x6e12jk40\131bi6BI
	DLSx6e12jk40\1b3B
Spin down disk and (after it stops) pull 15 amp CKT breaker above.	l5468x6e12jk40\19i17I
	IMPx6e12jk40\1b3B
Don't worry about it unless NCC has asked you from an earlier phone call to call
		just before removing power.	
NCC likes to be called two days before scheduled shutdowns.	l5468x6e12jk40
	Doradosx6e12jk40\1b7B
For each Dorado, if it is not already powered off (green light 5 flash) find its	 			terminal and press boot button seven times in quick succession to shut down.	
Wait until green lights are flashing fives before throwing CKT breakers.	l5468x6e12jk40\50i21I
4.	Start Up Sequence:x6e12jk40\f5b21B
	Close only those circuit breakers on panels marked Maxc, Maxc-A, & Maxc-B, that were opened
	during the initial powerdown sequence.	x6e12jk40\7ui4UI
	Twinkle	(Should be started first for Date & Time source to other systems.)	x6e12jk40\1b7B1bi66BI
Turn on AC Power and spin up disks	
Boot ALTO	
Type GATEWAY<cr>	(2 minutes to come on)	l5468x6e12jk40
	NOTE 5:	Don't bring anything else up until message "Gateway in operation" appears on
		Twinkle screen, or 1 minute after screen turns blank, whichever occurs first.	l5468x6e12jk40(0,6350)(1,8128)\1bi4B1b2BI1f1 156f0
 Remaining machines can be started in any order (or simultaneously).	x6e12jk40(635)\1bi67BI
	DLSx6e12jk40\1b3B
Set CKT breaker	
Spin up disk	
Boot ALTO	
Type DLSCONTROL	l5468x6e12jk40
	Maxcx6e12jk40\1b4B
Turn on ALTO	
Spin up ALTO disk	
Turn on all Processor and Memory cabinet power supplies	
Boot the Alto and run the Midas subsystem.  With the left mouse button,	
succesively select the menu items "Power On", "Both", and "Do-It".	
Turn on Disk drive AC power (in rear) then front panel switches	l5468x6e12jk40
	WARNING:	Wait at least 10 seconds between spinning	
			up each drive to allow for the starting surge.	l5468x6e12jk40(0,6350)\bi9BI
Normally the configuration is set up properly; just type MIDAS TENGO.	
See Section 5 & 6 of Maxc Operations for abnormal situations.	l5468x6e12jk40(635)\92bi15BI
After all disk drives are ready you may start AltIO and start Tenex by	
selecting "Run-Prog", "Tengo" with the mouse.	l5468x6e12jk40(0,6350)
	Alpinex6e12jk40(635)\1b6B
Turn on Dorado.	
Turn on T-80 and T-300 power.	
Spin up T-80 and T-300.	
Boot.	
Type cr to command line "Luther".	l5468x6e12j
	Ivy x6e12jk40\1b3B
Turn on ALTO	
Spin up Diablo disk	
Turn on Trident disks AC power	
Spin up Trident Disks	
Boot
Type IFS	l5468x6e12j
	Doradosx6e12jk40\1b7B
Turn on Breakers (that's all)	l5468x6e12jk40
	Impx6e12jk40\1b
Should restart by itself.  Call NCC to verify correct operation.	l5468x6e12jk40
Referencesx6e36k120\b
1.	Edward R. Fiala, Charles M. Geschke, Edward Taft, and Ronald L. Weaver Maxc Operations, XEROX, April 24, 1984.		l3696d2992x3e6jk40(0,3712)(1,65535)\74bi15BI
(635)