Honeywell MSU0402 User manual

HONEYlVELL .
ILARGE SYSTEMS
MSU0402/0451
MASS
STORAGE UNITS
OPERATION
HARDWARE

Large System.s
MSU0402/MSU0451
Mass Storage Units Operation
SUBJECT
General Description, Operation, and Maintenance Procedures for the
MSU0402/MSU0451 Mass Storage Units and their Mass Storage Processors
SPECIAL INSTRUCTIONS
This edition supersedes AT71-02, dated October 1977, and its addenda,
AT71-02A, dated December 1980, and AT71-02B, dated July 1982. This man-
ual has been extensively revised; therefore, change indicators are not used.
The followingnotice is provided in accordance with the United States Federal
CommunicationsCommission's(FCC) regulations.
Warning:
This equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in accordance with the instructions
manual, may cause interference to radio communications. As temporarily
permitted by regulation it has not been tested for compliance with limits for
Class A computing devices
pursuant to Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection against such inter-
ference. Operation of this equipment in a residential area is likely to cause
interference
in whichcase the user at his ownexpensewillbe required to take
whatever measures may be required tocorrect the interference.
ORDER NUMBER
AT71-03 October1982
Honeywell

About ThisManual
This reference document provides hardware-oriented descriptive and instructive
material for the user of the MSU0402/MSU0451 Mass Storage Units and for
others concerned with their technical aspects, application, or use.
Divided
into three sections and an appendix, this manual contains a general
description of the hardware used in the subsystem,includingperformance
specifications,capabilities, features,
and options(Section 1); a description of the
operator-accessiblecontrol panel switches and indicators(Section 2); the
operating proceduresnecessaryto enable personnelto operate the units and main-
tenance procedures(Section3); and mass storage processor information in the
appendix.
Honeywell disclaims the implied warranties of merchantability and fitness for a partic-
ular purpose and makes no express warranties except as may be stated in its written
agreement with and for its customer.
In no event is Honeywell liable to anyone for any indirect, special or consequential
damages. The information and specifications in this document are subject to change
without notice.
©HoneywellInformation Systems Inc., 1982 FileNo.: 1L03, 1P03 AT71-03

Contents
Section 1. Introduction
Data Integrity and Protection ......... 0 • 0 • • • • • • • • • • • • • • • • • • • • • •• 1-1
Improved
System Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Options ................................................. 0..... 1-2
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Disk File Format Consideration ..................... 0 • • • • • • • • • • • 1-2
Intermixing .................... 0 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 1-3
Section 2. Controls and Indicators
Section 3. Operating Procedures
Power-Up Sequence. . . . . . . .. . ... .. . . . . . . . .. .. . . . . .. . . . . . . . . .. .. 3-1
Power-Down Sequence
................... , ,. ...... . ... . .. ....... 3-1
Initialization .................................................. 3-2
Disk Pack Loading.. . . . . . .. . . .. . . . . . . .. . . . . . . . . . . .. . . . . . . . . .. .. 3-2
Disk Pack Unloading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3
Unit Select Plug Swapping ..................................... 3-3
Disk Pack Handling and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4
General Cleaning. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . ... 3-4
Appendix. Mass Storage Processors
Components. . . . .. .. . . . . .... . . . . .. . . . . . . .. . . . . . . .. . . . . . . . . . . . .. A-I
Mass Storage Subsystem Configurations. . . . . . . . . . . .. .. . . . . . . . . .. A-5
Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. A-8
Figures
2-1 MSU0402/0451 Control Panel. . . . . . . .. .. . . .. . . . . . . . . . . .. .. 2-2
A-I Mass Storage Processor Components. . . . . . .. .. . . . . . . . . . . . .. A-2
A-2
Integrated Mass Storage Processor Control Panel. . . . . . . . . .. A-8
A-3
Freestanding Mass Storage Processor Control Panel. . . . . . .. A-8
iii AT71-03

Tables
1-1 Mass Storage Unit Characteristics ........................ 1-3
3-1
Preventive Maintenance. . . .. . . . . . . .. . . . . . . . . . . . . . . . . . . . .. 3-4
A-I Mass Storage Processors for MSU0402/0451 . . . . . . . . . . . . . ... A-2
A-2
Mass Storage Processor Options . . . . . . . . . . . . . . . . . . . . . . . . . .. A-3
A-3 MSP0602/0603
Mass Storage Processor Configurations. . . . .. A-5
A-4 MSP0605 Mass
Storage Processor Configurations. . . . . . . . ... A-6
A-5 MSP0604/0607/8000/8001 Mass
Storage Processor
Configurations. .. . . . . . . . . . . . . . .. . . . . .. .. . . . . . . .. . .. .. A-6
A-6 MSP0609 Mass
Storage Processor Configurations. . . . . . . . . .. A-7
A-7 MSP0611 Mass
Storage Processor Configurations. . . . . . . . . .. A-7
A-8 MSP0612 Mass
Storage Processor Configurations. . . . . . . . . .. A-7
A-9 Mass
Storage Processor Controls and Indicators. . . . . . . . . . .. A-8
iv
AT71-03

Section1
Introduction
TheMSU0402IMSU0451 MassStorage Units are high-capacity disk storage sub-
systems
with advancedmicroprogrammedcontrol and operating features that
improveresponse time and throughput. The MSU0402 is identical in appearance
and operationto the MSU0451 and may befield-upgraded (see Options)to an
MSU0451. Up to32 of these disk units per mass storageprocessor can beconnected
to any LargeSystem. The disk units are controlledbyphysically integrated or
freestandingmassstorageprocessors(described in AppendixA).
Data Integrity and Protection
The integrity and protection of data is ensured by the followingfeatures:
• Writeprotectcapability-Individualwrite-protect push button for each disk
unit excludes the possibility of recordingonprotectedfiles.
• Automaticunloading-Heads automatically unload when specificconditions,
such as low rotational speed or loss of power, are detected.
• Powerfaultsensing- If an ac or dc power fault has occurred,recording cannot
take place.
• Write currentmonitoring- Write current is inhibited during seeks or without
command and lossisdetected during a write command.
• Check code insertion- The validity of recorded informationis ensured by the
insertion of characters of checkinformation C~check code") in each record.
• Paritychecking- The devicemonitorscommand and data lines forodd parity; if
even parity isdetected,a fault isset.
• Temperaturesensing- Temperatures greater than equipment specifications
are displayed and an audible alarm sounded.
• Headoffset- Heads may beoffset by commandtofacilitate data recovery.
• Nolmultiheadselect- The devicechecksfor no/multiheads being selected,
whichwillproducea
fault condition.
Introduction 1-1 AT71-03

Improved System Availability
An enhanced diagnostic ability reduces both system time required for online
repair and the total offline repair time spent on the unit itself. Online error and
status reporting to the central processor system allowssoftware-controlleddiag-
nosis
of the electronics.
Options
• MSF0006-Dualaccesscapability
• MSF0007-Rotationalpositionsensing(required)
• MSK4025-Upgrade kit forMSU0402toMSU0451
Characteristics
Table1-1 lists the operational characteristics of both devices.
The physicalcharacteristicsare:
• Height- 39.2 in. (99.7 cm)
• Width- 22.0in. (55.9cm)
• Depth- 44.5in. (113.0 cm)
• Weight-680lb (309 kg)
The HoneywellM4451 diskpack(or equivalent) canberemovedfrom the unit,
stored, and inserted as the need arises. For supplies and accessories order informa-
tion,
refer to the HoneywellComputerSuppliesCatalog, Order No. BY62, orcon-
sult your Honeywell Marketing Representative.
Disk File Format Consideration
Introduction
Physically, the MSU0402 and MSU0451 disk packs are the same. The logicalfile
formatsfor labels,T&Ds,
and alternate track locations are different,therefore,
disk
pack files cannotbe interchanged between the MSU0402 and MSU0451. The
M4451 disk pack used on the MSU0402 requires reformatting prior to useon a
MSU0451.
1-2 AT71-03

Table1-1. MassStorage U nit Characteristics
Characteristics
Data capacity. Formatted (millions6-bit characters!
millions9-bitbytes)
Transfer rate (thousands 6-bit characters per sf
thousands 9-bitbytes per s)
Bit density (bpi)
Track density (tpi)
Averageaccess
time (ms)
Minimum seek time (ms)
A
verage seek time (ms)
Maximum seek time (ms)
Average
latency (ms)
Simultaneity
Disks per pack
Recordingsurfaces per pack
Tracks per recordingsurface
(sparesincluded)
Spindlespeed(rpm)
Diskpack
used (orequivalent)
Intermixing
MSU0402 MSU0451
117178
235/156
1074/716 10741716
4040 4040
384
384
33.3 38.3
8.0 8.0
25.0 30.0
45.0 55.0
8.3 8.3
During data transfer onone unit, a simul-
taneousseekoperation
can beperformed
onall
other units on the same mass
storageprocessor.
12 12
19 19
411 815
7 7
3600 3600
M4451 M4451
Mass storage processorsfor all Large Systems (TableA-I) have been designedto
allowMSU0400
and MSU0451 units or MSU0402 and MSU0451 units to be inter-
rnixedon the massstorageprocessors. (See Tables A-3 through A-B.)MSU0400
and MSU0402 units cannot be intermixed.
Introduction
The advantages of this capability are as follows:
• Eases conversiontoMSU0451. Installation ofMSU0451s can be staggered, one
ortwo
at a time,minimizing system disruption.
1-3
AT71-03

Introduction
• Combines the lowerprice-per-character advantage of the MSU0451 with the
performance advantage (faster accesstime) of the MSU0400. Storing of a
smaller number of files on the MSU0400 also results in less arm contention to
high-acti vity files.
• Allowscontinued use of previously purchased disk packs. The smaller-
capacity,less-expensive MSU0400 disk pack can be used as removable media
during new program and file debugging.
The MSU0402/0451 can also be intermixed with MSU0500. Additionally,
MSU0451 can be intermixed with MSU0501. (See Tables A-3 through A-B.)
1-4 AT71-03

Section2
ControlsandIndicators
Primary poweris controlledby the MAINPOWERcircuit breaker locatedinside
the rear door of the unit. The controls and indicatorson the control panel for the
MSU0402 and MSU0451 are shown in Figure 2-1.
Adescription of the function of each indicator and controlfollows:
START/STOP
This push button/indicatorisusedto start and stopspindlerotation. When lighted
(red), it indicates that powerisappliedto the spindlemotor. Ifpressed when
lighted, it causes the spindle to cometoa stop and the indicator light goesout.
READY
This indicator lights (green) when the spindleis rotating at properspeed, the
heads are loaded, and the unit is ready toacceptcommands.
CHECK
This push button/indicator lights (red) when a fault condition has occurred or the
air flow isinsufficient. After correcting the problem,press the button to clear the
fault registers and reset the indicator.
OFFLINE
This indicator lights (white) when the unit is in the offlinemode. The unit may be
placedoffline by
setting the OFFLINEswitchon the maintenance panel behind
the rear door of the unit.
PROTECT
This push button/indicatoris usedto inhibit or enable write operations on the disk
pack.When the PROTECTindicatoris lighted (yellow), pressing it will turn the
light off and enable write operations. When the PROTECTindicatorisoff,
pressing
it will turn it on and inhibit write operations.
Controls and Indicators
2-1 AT71-03