Fujitsu MBA3147RC Product Manual - Page 44

Data Format

40

C141-E252

Type 2 (Reassignment of write fail sector)

1) Commands to be applied

-

WRITE

-

WRITE EXTENDED

-

FORMAT UNIT

-

WRITE at executing WRITE AND VERIFY

2) Application requirements / processing

When WRITE/WRITE EXTENDED command detects any Servo error (e.g. Write offtrack error)

and cannot be recovered within pre-determined retry number (specified in Mode Parameter). For

the sectors around defective Servo, alternate blocks are allocated and the data of this WRITE

commands are re-written.

Sectors to be made AWRE shall be following:

-

the sector where the error occurs and the latter sectors and,

-

the sectors whose data are logically continual and stored in Cache,

-

the sectors which will be processed in this Write command and,

-

the sectors which locate between erroneous Servo -1 and +1 (including Split sector)

This function is also applied for the sector that has already been re-assigned.

Remark:

When a write protection is prohibited through the setting terminal, the auto alternate block

allocation processing specification is disabled.

Automatic alternate block allocation is made up to the following

quantities during the execution of one command:

ARRE = Twice

AWRE (Type 1) = Eight times

AWRE (Type 2) = Maximum number which can be processed within

the recovery time limit

If more than the above mentioned defective block is detected, the

alternate block assignment processing for the first defective block is

executed but the alternate block assignment processing for the second

one is not executed and the command being executed terminates.

However, the initiator can recover the twice error by issuing the same

command again.

When an error is detected in a data block in the data area, recovery

data is rewritten and verified in automatic alternate block allocation

during the execution of the READ or READ EXTENDED command.

Alternate block allocation will not be made for the data block if

recovery is successful.

Example:

Even if the data error which is recoverable by the WRITE

LONG command is simulated, automatic alternate block

allocation will not be made for the data block.

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
REVISION RECORD	3
Preface	5
Important Alert Items	7
MANUAL ORGANIZATION	9
CONTENTS	11
Illustrations	15
Figures	15
Tables	16
CHAPTER 1 General Description	17
1.1 Standard Features	17
1.2 Hardware Structure	21
1.3 System Configuration	22
CHAPTER 2 Specifications	23
2.1 Hardware Specifications	23
2.1.1 Model name and order number	23
2.1.2 Function specifications	24
2.1.3 Environmental specifications	27
2.1.4 Error rate	28
2.1.5 Reliability	28
CHAPTER 3 Data Format	31
3.1 Data Space	31
3.1.1 Cylinder configuration	31
3.1.2 Alternate spare area	34
3.1.3 Track format	35
3.1.4 Sector format	36
3.1.5 Format capacity	38
3.2 Logical Data Block Addressing	38
3.3 Defect Management	40
3.3.1 Defect list	40
3.3.2 Alternate block allocation	40
CHAPTER 4 Installation Requirements	45
4.1 Mounting Requirements	45
4.1.1 Dimensions	45
4.1.2 Mounting orientations	47
4.1.3 Notes on mounting	48
4.2 Power Supply Requirements	52
4.3 Connection Requirements	54
4.3.1 Connector location	54
4.3.2 Interface connector	55
4.3.3 Ready LED output signal	57
4.3.4 Connector requirements	57
CHAPTER 5 Installation	59
5.1 Notes on Handling HDDs	59
5.2 Setting	61
5.2.1 Port Address	61
5.3 Mounting HDDs	61
5.3.1 Mounting procedures	61
5.4 Checking Operation after Installation and Preparing the HDDs for Use	62
5.4.1 Checking initial operation	62
5.4.2 Formatting	63
5.4.3 Setting parameters	65
5.5 Dismounting HDDs	68
CHAPTER 6 Diagnostics and Maintenance	69
6.1 Diagnostics	69
6.1.1 Self-diagnostics	69
6.1.2 Test programs	72
6.2 Maintenance	73
6.2.1 Precautions	73
6.2.2 Maintenance requirements	74
6.2.3 Maintenance levels	75
6.2.4 Tools and test equipment	75
6.2.5 Tests	76
6.3 Operation Check	77
6.3.1 Initial seek operation check	77
6.3.2 Operation test	77
6.3.3 Diagnostic test	77
6.4 Troubleshooting	78
6.4.1 Outline of troubleshooting procedures	78
6.4.2 Troubleshooting with HDD replacement in the field	78
6.4.3 Troubleshooting at the repair site	80
6.4.4 Troubleshooting with parts replacement in the factory	81
6.4.5 Finding possibly faulty parts	81
6.5 Packaging	81
6.5.1 Unitary packaging	81
6.5.2 Multi-box packaging	82
CHAPTER 7 Error Analysis	85
7.1 Sense Data Collection	85
7.1.1 Sense data	85
7.1.2 Sense data format	85
7.2 Sense Data Analysis	87
7.2.1 Error information indicated with sense data	87
7.2.2 Sense data (3-0C-03), (4-32-01), (4-40-xx), (4-C4-xx), and (4-44-xx)	88
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error	88
7.2.4 Sense data (5-2x-xx), (B-47-xx), (B-4B-xx) and (B-4E-00): interface error	88
Glossary	89
Acronyms and Abbreviations	91
Index	93
Comment Form	97

Fujitsu MBA3147RC Product Manual - Page 44

WRITE at executing WRITE AND VERIFY, FORMAT UNIT

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