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Chapter 3 Media Changer Commands
Persistent Reserve In Command (5Eh)
96 Quantum ATL SuperLoader Software Interface Guide
Table 42 Read
Reservations
Parameters
The figure and table below illustrate and describe the data fields of
each Read Reservations descriptor’s data fields.
Field Name Description
Generation The value in this field is a 32-bit counter in the device server that is
incremented each time a PERSISTENT RESERVE OUT command requests a
Register, Clear, Pre-empt, or Pre-empt and Clear operation. Note that
PERSISTENT RESERVE IN commands do not increment the counter, nor do
PERSISTENT RESERVE OUT commands that perform a Reserve or Release
service action, or by a PERSISTENT RESERVE OUT command that is not done
due to an error or a reservation conflict. The value in the Generation field is set
to 0 as part of the power on or reset processes.
The value in the Generation field allows the application client that examines
the value to verify that the configuration of the initiators attached to a logical
unit has not been modified by another application client without any
notification of the application client doing the examination.
Additional
Length
This field contains the count of the number of bytes of Reservation descriptors
(bytes 8 – n). Note that this field contains the number of bytes regardless of the
value prescribed by the Allocation Length field in the command’s CDB.
Reservations
Descriptors
One Reservation descriptor is reported for each unique persistent reservation
on the logical unit when the PERSISTENT RESERVE IN command has
indicated a Read Reservations action. Figure 53
on page 97 and table 43 on
page 97 detail the contents of each Reservation Descriptors field.
- Software Interface 1
- 6207947-00cN 98 2
- Contents 3
- Intended Audience 0 15
- Purpose 0 16
- Organization 0 16
- Document Conventions 0 17
- Document Conventions 18
- Theory of Operation 19
- SuperLoader DLT 1 20
- SuperLoader LTO 1 20
- Medium Changer Elements 1 20
- Events 1 21
- Automatic Drive Cleaning 1 23
- Automatic Drive Cleaning 24
- Messages 27
- Chapter 2 Messages 29
- Message Format 29
- Supported SCSI Messages 2 31
- Command 32
- Complete (00h) 32
- Disconnect (04h) 2 32
- Supported SCSI Messages 34
- Table 5 Identify 34
- Table 7 Response to 36
- Initiator Detected Error 36
- No Operation (08h)2 38
- Restore Pointers 38
- Save Data Pointer 38
- Table 8 Transfer 41
- Figure 5 Wide Data 42
- Transfer Request 42
- Media Changer Commands 45
- Table 9 Supported 46
- Media Changer 46
- Commands 46
- Figure 6 Initialize 49
- Inquiry Command (12h) 3 50
- Figure 9 51
- Inquiry Command (12h) 52
- Figure 9 Standard 52
- Inquiry Data (LTO) 52
- Figure 10 Standard 53
- Inquiry Data (DLT) 53
- Table 10 Standard 54
- Inquiry Data (LTO and 54
- SuperLoader 57
- Table 13 Supported 60
- Identifiers 60
- Figure 15 Command 61
- Support Data Page 61
- Table 14 Command 61
- Load Unload Command (1Bh) 3 63
- Log Sense Command (4Dh) 3 64
- Log Sense Command (4Dh) 65
- Table 16 Log Sense 65
- Figure 18 Supported 67
- Pages Page 67
- Figure 21 TapeAlert 70
- Log Sense Header 70
- Table 21 Move 74
- Statistics 74
- Figure 24 Hard/Soft 75
- Move Error Statistics 75
- Table 22 Hard/Soft 76
- Figure 26 Device 78
- Wellness Log Sense 78
- (0000h-000Fh) 78
- Figure 27 Log 79
- Parameters for Device 79
- Figure 28 Device 80
- Status Log Sense 80
- Figure 30 Device 82
- Page (0001h) 82
- Table 26 Device 83
- Table 31 Mode 91
- Select Page 91
- Figure 39 Mode 92
- Sense (6) Command 92
- Descriptor Block 92
- Table 35 TapeAlert 98
- Page Format 98
- Figure 45 Element 101
- Address Assignment 101
- Table 36 Element 102
- Figure 46 Transport 103
- Geometry Parameters 103
- Figure 48 Device 105
- Capabilities Page 105
- Table 38 Device 106
- Move Medium Command (A5h) 3 107
- Move Medium Command (A5h) 108
- Table 39 Move 108
- Medium Command 108
- Figure 50 Persistent 109
- Reserve In Descriptor 109
- Table 40 Persistent 110
- Read Key data parameters 111
- Table 41 Read Keys 112
- Figure 52 Read 113
- Reservations 113
- Parameters 113
- Table 42 Read 114
- Table 44 Persistent 117
- Reservation Type 117
- Table 46 Persistent 128
- Figure 56 Persistent 130
- Reserve Out 130
- Parameter List 130
- Table 47 Persistent 131
- Service and Scope value 132
- Figure 57 Position to 134
- Element Descriptor 134
- Table 49 Position to 135
- Element Command 135
- Figure 58 Prevent/ 136
- Allow Medium 136
- Read Buffer Command (3Ch) 3 138
- Read Buffer Command (3Ch) 139
- Table 51 Read Buffer 139
- Command Descriptor 139
- Figure 61 Read Buffer 141
- Descriptor 141
- Figure 62 Echo Buffer 142
- Table 53 Echo Buffer 143
- Figure 63 Read 144
- Element Status 144
- Figure 64 Element 146
- Status Data Header 146
- Table 55 Element 147
- Status Data 147
- Figure 65 Element 148
- Status Page 148
- Figure 66 Data 149
- Figure 67 Medium 150
- Transport Element 150
- Table 56 Medium 151
- Figure 68 152
- Figure 69 153
- Figure 69 Import/ 154
- Export Element 154
- Figure 70 155
- Figure 70 Data 156
- Transfer Element 156
- Table 59 Data 157
- Figure 71 Release 158
- (10) Descriptor Block 158
- Table 60 Release 159
- (10) Command 159
- Figure 72 Release 160
- (10) ID Only 160
- Figure 73 Release 161
- Unit (6) Descriptor 161
- Block (LTO) 161
- Figure 74 Release 162
- Block (DLT) 162
- Figure 75 Report 163
- Device Identifier 163
- Table 62 Report 165
- Parameter Data 165
- Report LUNS Command (A0h) 3 166
- Report LUNS Command (A0h) 168
- Request Sense Command (03h) 3 169
- Request Sense Command (03h) 170
- Figure 81 Request 170
- Table 64 Request 171
- Sense Data 171
- Table 65 Supported 173
- Sense Keys for 173
- Request Sense 173
- Table 66 Supported 174
- ASC / ASCQ (Hex) for 174
- Figure 82 Reserve 178
- Element (10) 178
- Table 67 Reserve 179
- Figure 83 Reserve 180
- Figure 84 Reserve 181
- Element (6) Descriptor 181
- Figure 85 Reserve 182
- Send Diagnostic Command (1Dh) 185
- Figure 87 Set Device 186
- Identifier Descriptor 186
- Test Unit Ready Command (00h) 188
- Figure 89 Test Unit 188
- Ready Descriptor 188
- Write Buffer Command (3Bh) 3 189
- Write Buffer Command (3Bh) 190
- Table 71 Write Buffer 190
- Command Data 190
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