IBM 3420 Manuals

Manuals and User Guides for IBM 3420. We have 2 IBM 3420 manuals available for free PDF download: Reference Manual, Manual

IBM 3420 Reference Manual

IBM 3420 Reference Manual (206 pages)

Magnetic Tape Subsystem

Brand: IBM | Category: Storage | Size: 6.15 MB

Table of Contents

Table of Contents
3
General
5
3803 Model 3 and 3803 Modell Differences
8
Recording Philosophy
10
Understanding EREP1
14
Procedure for Scoping 3420 Tape Unit Sense Bits on Logic Board
22
3420/3803 Status/Sense Bytes
23
What Is Where in the MLM
35
Common Abends
39
Tools and Test Equipment
43
IRD PEP Specialist
50
Magnetic Tap
52
Commol1 Media Related Problems
56
Read/Write Service Techniques
59
Read/Write Failure Analysis
67
Read/Write Head Service Hints
69
3420 Read/Write NTF
71
Tape Developing Procedure
73
Developed Tape Samples
75
3420 RD/WR Data Flow
77
3420 Tape Motion Service Techniques
79
3420 Tape Motion NTF Checklist
83
3420 Tape Motion
85
3420 Power Service Techniques
87
3420 Power - DC Voltages
91
3420/6250 Conversion Tips
95
20 PM Schedule
99
3420 Sales Feature Codes
103
3420 (All Models) Status Identifier
105
3420 ECA Checklist
106
Models 4, 6, 8 - al Board
121
Card Jumpers - Models 4,6,8
128
3803 Modell Data Flow
140
3803 Model 2 Data Flow
141
3803 Microprocessor Instruction Format
143
3803 Microprocessor Tips
145
Current ALU Patches
149
Current 3420/3803 Related Software Zaps
153
3803 Channel Interface
155
3803 DC Voltages
163
3803 Mod 1 to 2 - 6250 Conversion Tips
165
3803 Conversion Tips from Data Bank
169
3803 Preventive Maintenance Schedule
173
3803 Sales Feature Codes
175
3803-1 Feature Identifier
177
3803-1 Feature Installation Times
179
3803-2 Feature Installation Times
183
3803 ECA Checklist
185
Bibliography
197
Reader's Comment Form
205

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IBM 3420 Manual

IBM 3420 Manual (61 pages)

Magnetic Tape Subsystems Subsystem Description

Brand: IBM | Category: Storage | Size: 3.12 MB

Table of Contents

Table of Contents
3
Section 1: Introduction
9
Basic Subsystem
9
3420 Tape Unit
9
Automatic Threading
9
IBM Easy Load Cartridge
9
Sense Bytes
9
Tape Transport
10
Read Back Checking
10
Full-Width Erasure
10
File Protection
10
Rewinding
10
3420 Models 4, 6, and 8
10
Recording Methods
11
6250 Bpi
11
800 BPI, Nine-Track NRZI
11
Seven-Track
11
Interblock Gaps
11
Magnetic Tape and Reels
11
Figure 1. Subsystem Characteristics
12
3803 Model 2 Tape Control
13
General Characteristics
13
Addressing
13
Metering
13
Enable/Disable Switch
14
Figure 2. 3803 Model 2 and 3420 Configurations
14
Power On/Off Sequencing
15
3803 Model 2 Features
15
Nine-Track NRZI
15
Seven-Track
15
Figure 3. Density Feature Combinations
15
Two-Channel Switch
16
Device Switch
16
Figure 4. Two-Channel Switch
16
Control Switch
17
Figure 5. Switching Configurations (Part 1 of 2)
18
Sense Byte
19
Figure 5. Switching Configurations (Part 2 of 2)
19
Sense Byte
20
Section 2: Commands and Instructions
21
Commands
21
Figure 6. 3803-2/3420 Commands
22
Burst Commands
23
Write
23
Read Forward
23
Read Backward
23
Sense
23
Sense Reserve
23
Sense Release
24
Request Track-In-Error (Request TIE)
24
Loop Write-To-Read (LWR)
24
Set Diagnose
24
Motion Control Commands
24
Rewind (REW)
25
Rewind/Unload (RUN)
25
Erase Gap (ERG)
25
Write Tape Mark (WTM)
25
Backspace Block (BSB)
25
Backspace File (BSF)
26
Forward Space Block (FSB)
26
Forward Space File (FSF)
26
Data Security Erase (DSE)
26
Non-Motion Control Commands
27
Operation (NOP)
27
Mode Set 1 (MS 1)
27
Mode Set 2 (MS 2)
27
Diagnostic Mode Set (DMS)
27
1/0 Instructions
28
Test 1/0
28
Halt 1/0
28
Section 3: Subsystem Operator Functions
29
Inserting Tape Reel in Cartridge
29
Load Procedure
29
Figure 7. Inserting Tape Reel in Cartridge
29
Figure 8. Load Procedure
29
Unload Procedure
30
Operating Procedures after Failure
30
Tape Fails to Thread (with Cartridge)
30
Tape Fails to Thread (Without Cartridge)
30
End of Tape Comes off Machine Reel) Hub as Tape Loads in Columns
30
Tape Threads Successfully but Fails to Load in Columns
31
Window Fails to Open after Unload Operation
31
Channel Fails to Select Tape Unit (Device Switching or Two-Channel Switch Feature Installed)
31
3420 Indicators and Pushbuttons
32
Figure 9. 3420 Indicators and Pushbuttons
32
3803 Operator's Panel
33
Toggle Switches
33
Enable/Disable Switch(Es)
34
Power On/Off Procedures
34
Power off
34
Figure 10. 3803 Operator's Panel
34
Power on
35
Section 4: Status and Sense Information 3
37
Status Byte
37
Sense Byte 0 (Unit Check)
39
Sense Byte 1
40
Sense Byte 2 (Track in Error)
41
Sense Byte 3 (Data and Equipment Checks)
42
Sense Byte 4
43
Sense Byte 5
43
Sense Byte 6 (Tape Unit)
44
Sense Byte 7 (Tape Unit Ready-Drop Source)
44
Sense Byte 8 (Microprogram Detected Errors)
45
Sense Byte 9
45
Sense Byte 10
46
Sense Byte 11 (MAL 1 ROS/MP Errors)
46
Sense Byte 12 (MAL 2 ROS/MP Errors)
47
Sense Byte 13
47
Sense Byte 13, Bits 2-7 and Sense Byte 14 (Tape Control Identification)
47
Sense Byte 15 and 16 (Tape Unit Identification - Serial Number)
47
Sense Byte 17 (Tape Control Features)
48
Sense Byte 18
48
Sense Byte 21 (Thread and Load Diagnostics)
49
Sense Byte 22 (Field Replaceable Unit Identification)
49
Sense Byte 23 (Field Replaceable Unit Identification)
49
Section 5: Error Recovery Procedures
51
Tape Cleaner Sequence
51
Operator Messages
52
Action Requirements
52
Terminal Action la (with Operator Option)
52
Terminal Action Lb (Without Operator Option)
52
Action II (Unit Check)
52
Action III (Intervention Required)
52
Action IV (Bus out Check)
53
Action V (Data Check on Read or Read Backward)
53
Action VI (Data Check on Write and Write Tape Mark)
54
Action VII (Overrun, Channel Data Check Chaining Check)
55
Action VIII (Data Check on Control)
55
Action IX (Not Capable)
55
Action X (Equipment Check, no Previous Sense Bits On)
55
Action XI (Data Security Erase)
55
Action XII (Load Point, Program Check, Protection Check, Incorrect Length)
55
Action XIV (ID Burst Check on Write and Write Tape Mark)
55
Supplementary Information
56
Index
57

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