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Fujitsu MAX3073NC Specifications - Page 92

Mode Sense 1a

UPC - 550221511118

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Command Specifications 3.1.7 MODE SENSE (1A) 0 1 2 Byte 3 4 5 7 6 LUN PC 0 0 Bit 5 4 3 2 X '1A' 0 DBD 0 Page Code Sub Page Code Transfer Byte Length 0 0 0 0 1 0 0 0 0 Link This command reports the values for each type of parameter related to the disk drive's physical attributes, data format, timing for SCSI bus disconnect and reconnect processing, error recovery procedures, etc., as well as the attributes of those parameters, to the INIT. The data (MODE SENSE data) transferred to the INIT from the IDD by this command are configured from a "Header," "Block Descriptor" and one or more "Page descriptors" which describe each type of parameter, each of which will be described later in this item. When "1" is specified in the "DBD (disable block descriptors)" bit of CDB byte 1, it indicates that a "Block descriptor" is not included in the MODE SENSE data transferred to the INIT by this command and the IDD transfers MODE SENSE data composed from the "Header" and the specified "Page descriptor" only to INIT. When "0" is specified in this bit, the IDD transfers MODE SENSE DATA composed of the "Header, " a single "Block descriptor" and the specified "Page descriptor" to the INIT. The "Page code" field in CDB byte 2 specifies the page code of the "Page descriptor" transferred to the INIT by this command. The types of "Page descriptor" supported by the IDD and their page codes and lengths are as shown below. 3-30 C141-C010

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
Revision History	3
Preface	5
Contents	11
Illustrations	16
Figures	16
Tables	17
CHAPTER 1 Command Processing	19
1.1 Command Format	19
1.2 Status	24
1.3 Outline of Command Processing	26
1.3.1 Single commands	26
1.3.2 Command link	27
1.3.3 Disconnect/reconnect processing	29
1.3.4 Synchronous mode data transfer/wide mode data transfer	33
1.4 Command Queuing Function	34
1.4.1 Untagged queuing	34
1.4.2 Tagged queuing	36
1.5 UNIT ATTENTION Condition	37
1.5.1 Generation of the UNIT ATTENTION condition	37
1.5.2 Response and release condition at UNIT ATTENTION condition hold state	38
1.5.3 UNIT ATTENTION condition multiple hold	38
1.6 Sense Data Hold State	40
1.6.1 Sense data hold condition	40
1.6.2 Response and release conditions at sense data hold state	40
1.7 Command Processing Exceptions	41
1.7.1 Overlapping commands	41
1.7.2 Illegal LUN specification	42
1.7.3 Reserved operation code	42
1.7.4 Command processing in the not ready state	42
1.7.5 Error recovery processing	44
1.7.6 Reset processing	46
1.7.7 Fatal hardware errors	47
1.8 Data Block Addressing	48
1.8.1 Definition of data space	48
1.8.2 Logical block addressing	50
CHAPTER 2 Data Buffer Management	51
2.1 Data Buffer	51
2.1.1 Data buffer configuration and basic operation	51
2.1.2 Operation mode setting	55
2.2 Look-Ahead Cache Feature	56
2.2.1 Caching operation	56
2.2.2 Caching parameters	59
2.2.3 Look-Ahead operation, Look-Ahead volume	60
2.3 Write Cache	61
CHAPTER 3 Command Specifications	63
3.1 Control/Sense Commands	63
3.1.1 TEST UNIT READY (00)	63
3.1.2 INQUIRY (12)	64
3.1.3 READ CAPACITY (25)	75
3.1.4 CHANGE DEFINITION (40)	76
3.1.5 MODE SELECT (15)	81
3.1.6 MODE SELECT EXTENDED (55)	89
3.1.7 MODE SENSE (1A)	92
3.1.8 MODE SENSE EXTENDED (5A)	100
3.1.9 REZERO UNIT (01)	103
3.1.10 START/STOP UNIT (1B)	103
3.1.11 RESERVE (16)	105
3.1.12 RESERVE EXTENDED (56)	108
3.1.13 RELEASE (17)	109
3.1.14 RELEASE EXTENDED (57)	110
3.1.15 REQUEST SENSE (03)	110
3.1.16 LOG SELECT (4C)	112
3.1.17 LOG SENSE (4D)	116
3.1.18 PERSISTENT RESERVE IN (5E)	117
3.1.19 PERSISTENT RESERVE OUT (5F)	124
3.1.20 REPORT LUNS (A0)	128
3.1.21 REPORT DEVICE IDENTIFIER (A3)	130
3.1.22 SET DEVICE IDENTIFIER (A4)	131
3.2 Data Access Commands	133
3.2.1 READ (08)	133
3.2.2 READ EXTENDED (28)	134
3.2.3 WRITE (0A)	135
3.2.4 WRITE EXTENDED (2A)	136
3.2.5 WRITE AND VERIFY (2E)	137
3.2.6 VERIFY (2F)	138
3.2.7 SEEK (0B)	139
3.2.8 SEEK EXTENDED (2B)	139
3.2.9 SET LIMITS (33) (Not Supported)	140
3.2.10 SYNCHRONIZE CACHE (35)	142
3.3 Format Commands	143
3.3.1 FORMAT UNIT (04)	143
3.3.2 REASSIGN BLOCKS (07)	153
3.3.3 READ DEFECT DATA (37)	156
3.4 Maintenance, Diagnostic Commands	161
3.4.1 SEND DIAGNOSTIC (1D)	161
3.4.2 RECEIVE DIAGNOSTIC RESULTS (1C)	168
3.4.3 WRITE BUFFER (3B)	172
3.4.4 READ BUFFER (3C)	177
3.4.5 READ LONG (3E)	181
3.4.6 WRITE LONG (3F)	182
3.4.7 WRITE SAME (41)	183
CHAPTER 4 Parameter Data Formats	185
4.1 Mode Parameters	185
4.1.1 Read/Write error recovery parameters (page code = 1)	185
4.1.2 Disconnect/reconnect parameters (page code = 2)	194
4.1.3 Format parameter (page code = 3)	198
4.1.4 Drive parameter (page code = 4)	202
4.1.5 Verify error recovery parameters (page code = 7)	203
4.1.6 Caching parameters (page code = 8)	205
4.1.7 Control mode parameters (page code = 0A)	211
4.1.8 Notch parameter (page code = 0C)	215
4.1.9 Port control parameter (page code = 19)	217
4.1.10 Informational exceptions control page (page code = 1C)	227
4.1.11 Background control mode parameter (page code = 1C/subpage = 01)	231
4.1.12 Additional error recovery parameters (page code = 21)	232
4.2 Log Parameters	233
4.2.1 Supprot log page (X'00')	233
4.2.2 Buffer overrun / underrun page (X'01')	234
4.2.3 Write error count page (X'02')	235
4.2.4 Read error count page (X'03')	238
4.2.5 Verify error count page (X'05')	242
4.2.6 Non-medium error count page (X'06')	245
4.2.7 Temperature page (X'0D')	246
4.2.8 Start-stop cycle counter page (X'0E')	247
4.2.9 Application client page (X'0F')	250
4.2.10 Self-test result page (X'10')	251
4.2.11 Background medium scan page (X'15')	253
4.2.12 SMART status page (X'2F')	255
4.2.13 SMART data page (X'38')	256
CHAPTER 5 Sense Data Error Recovery Methods	257
5.1 Sense Data	257
5.1.1 Sense data format	257
5.1.2 Sense data basic information	258
5.1.3 Sense data additional information	268
5.2 INIT Error Recovery Methods (Recommended)	268
5.2.1 Termination status analysis and error recovery methods	268
5.2.2 Sense data analysis and error recovery methods	271
5.2.3 Error logging	278
5.3 Disk Drive Error Recovery Processing	279
5.3.1 Error states and retry processing procedures	279
5.3.2 Auto alternate block allocation processing	280
5.3.3 Error recovery processing control	282
CHAPTER 6 Disk Media Management	285
6.1 Defect Management	285
6.2 Disk Media Initialization	287
6.2.1 Initialization during installation	287
6.2.2 Re-initialization	289
6.3 Data Block Verification Methods (Recommended)	290
6.4 Alternate Block Allocation Processing	291
Glossary	293
Acronyms and Abbreviations	297
Index	299
READER’S COMMENT FORM	307

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Command Specifications

3-30

C141-C010

3.1.7

MODE SENSE (1A)

Bit

‘1A’

LUN

DBD

Page Code

Sub Page Code

Transfer Byte Length

Byte

Link

This command reports the values for each type of parameter related to the disk drive's physical attributes,

data format, timing for SCSI bus disconnect and reconnect processing, error recovery procedures, etc., as

well as the attributes of those parameters, to the INIT.

The data (MODE SENSE data) transferred to the INIT from the IDD by this command are configured

from a "Header," "Block Descriptor" and one or more "Page descriptors" which describe each type of

parameter, each of which will be described later in this item.

When "1" is specified in the "DBD (disable block descriptors)" bit of CDB byte 1, it indicates that a

"Block descriptor" is not included in the MODE SENSE data transferred to the INIT by this command

and the IDD transfers MODE SENSE data composed from the "Header" and the specified "Page

descriptor" only to INIT.

When "0" is specified in this bit, the IDD transfers MODE SENSE DATA

composed of the "Header, " a single "Block descriptor" and the specified "Page descriptor" to the INIT.

The "Page code" field in CDB byte 2 specifies the page code of the "Page descriptor" transferred to the

INIT by this command.

The types of "Page descriptor" supported by the IDD and their page codes and

lengths are as shown below.