Xerox 7261 Manuals

Manuals and User Guides for Xerox 7261. We have 1 Xerox 7261 manual available for free PDF download: Reference Manual

Xerox 7261 Reference Manual

Xerox 7261 Reference Manual (58 pages)

Removable Disk Storage System

Brand: Xerox | Category: Storage | Size: 13.63 MB

Table of Contents

Table of Contents
5
General Description
9
- System Components
  9
Characteristics of 7265/7266 ("B") System
11
Functional Description
13
- Data Presentation
  13
- Disk System States
  13
  - Mode
    13
  - Operational States
    13
Ready Condition
13
- Busy Condition
  13
- Unavailable Condition
  13
- Transitions between States
  14
- Data Transfer
  14
Device State Transitions
14
Program Interface
15
- Disk Pack Organization
  15
- Data Organization
  15
- Headers
  15
- Data Access
  15
- Check Characters
  15
- Disk Pack Organization
  16
- Device Orders
  18
  - Header Write (X'09')
    18
  - Seek (X'83' ,X'03')
    19
  - Write (X'ol')
    19
  - Check-Write (X'05')
    20
  - Header Read (X'OA')
    20
  - Read 1 (X' 12')
    20
  - Read
    21
  - Restore Carriage
    21
  - Reserve (X'07)
    21
  - Release (X'17')
    21
  - Condition Release Interrupt (X' Lf', X'OF')
    21
  - Select Test Mode
    22
    
    Buffer Test Mode
    22
    
    Controller Test Mode
    22
    
    Device Test Mode
    22
    
    Incremental Clock Test Mode
    22
    
    Force Device 1/0 Parity Error
    22
    
    Force Read Data Error
    23
    
    Force IOP Input Parity Error
    23
    
    Force IOP Output Parity Error
    23
    
    TDV Instruction in Test Mode
    23
  - Sense (X'04')
    23
- Key Events
  24
  - Start Input/Output
    25
  - Unusual End Conditions
    25
  - Channel End Conditions
    25
  - Transmission Error Conditions
    25
  - Incorrect Length Conditions
    25
- Status Response
  26
  - Condition Codes
    26
  - Device Status Byte
    26
  - Operational Status B y T E
    26
  - IOP Status Byte
    26
Condition Code Settings
26
Device Status Response for SIO, HIO, and TIO
27
Device Status Response for TDV
27
IOP Status Byte for AIO
29
Programming Considerations
30
- Command Chaining
  30
- Surface Flawing
  30
- Surface Operations
  30
- Seek and Restore Operations
  30
- Dual Access Considerations
  30
Data In/Data out Operations
32
Reserve Order
32
Select Test Mode Order
32
Seek Order
33
Sense Order
34
Header Read Order
36
- Position Verification
  37
- Write Order
  38
- Check-Write Order
  39
- Read Orders
  40
- Program 1/0 Interrupt Environment
  41
- Disk System Interrupt Environment
  41
  - Controller-Initiated Interrupts
    41
    
    IOP-Initiated Interrupt
    41
    
    Attention Interrupt
    41
- Condition Release Interrupt Order
  41
  - Release Interrupt
    42
  - On-Sector Interrupt
    42
- Disk System Error Detection Environment
  42
- I/O Fault Detection and Recovery Actions
  42
  - Interrupts
    43
  - Priority of Device-Dependent Testing
    43
Xerox Removable Disk Storage Systems Testing Sequence
43
- Recovery Actions
  45
- Fault Logging
  46
- Irrecoverable Errors
  46
Operations
47
- Controls and Indicators
  47
  - Operator Control Panel
    47
- Disk Drive Operator Control Panel
  47
  - CE Maintenance Panel
    48
- Disk Drive CE Maintenance Panel
  48
- Operating Procedures
  49
  - Disk Pack Installation
    49
- Opening Top Door on Disk Drive
  49
- Lifting Disk Pack by Top Canister Handle
  49
Removing Bottom Canister Cove
49
- System Power Turn on
  50
  - Controller Power Turn on
    50
Controller Cabinet Power Panel
50
- Disk Drive Power Turn on
  51
- Disk Drive Start up Procedure
  51
Disk Drive Power Assembly Panel
51
- Disk Drive Stopping Procedure
  52
- System Power Turn off
  52
  - Controller Power Turn off
    52
  - Disk Drive Power Turn off
    52
  - Disk Pack Removal
    52
Removing Disk Pack
52
- The Care and Maintenance of Disk Packs
  53
  - Handling
    53
  - Labeling
    53
  - Inspection
    53
  - Filter Replacement
    54
- Disk Pack
  54
Location of "0" Ring on Filter
54
Removing "0" Ring
54
- Usage Log
  55
- Cleaning
  55
- Storage
  55
Removing Disk Pack Filter
55

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