Main
Page
Page
Page
Page
Page
Contents
Page
Page
Page
Page
Page
List of Figures
Page
1.0 Publication overview
1.1 Acknowledgements
1.2 How to use this manual
1.3 General interface description
2.0 Introduction to Fibre Channel
2.1 General information
2.2 Channels vs. networks
2.3 The advantages of Fibre Channel
3.0 Fibre Channel standards
3.1 General information
Page
Page
4.0 Introduction to topologies
4.1 Nodes
4.2 Ports
4.3 Links
4.4 Arbitrated loop topology
4.5 Topology and port login
4.6 Port bypass circuits
12 Fibre Channel Interface Manual, Rev. D
Figure 3. Port bypass circuit physical interconnect
5.0 Data encoding (FC-1)
5.1 Encoding and decoding
5.2 Buffer-to-buffer data transfers
5.3 Data hierarchy
5.4 Ordered sets
Page
Page
Page
Page
Page
Page
Page
6.0 Framing protocol (FC-2)
6.1 Frames
Page
Fibre Channel Interface Manual, Rev. D 25
Table 9: Frame Control (F_CTL) bit definitions
26 Fibre Channel Interface Manual, Rev. D
Table 10: Routing Control values
Fibre Channel Interface Manual, Rev. D 27
Table 11: Data type codes
Table 10: Routing Control values (Continued)
6.2 Frame sequences
6.3 Exchanges
6.4 Credit
Page
7.0 Classes of service (FC-2)
7.1 Class 1
7.2 Class 2
7.3 Class 3
7.4 Classes 4 and 5
8.0 FC Arbitrated Loop concepts
8.1 Arbitrated Loop physical address (AL_PA)
34 Fibre Channel Interface Manual, Rev. D
* character with neutral disparity.
Table 12: 8B/10B characters with neutral disparity
8.2 Loop initialization
Page
Page
Page
Page
Page
Page
Page
Page
Page
Fibre Channel Interface Manual, Rev. D 45
8.2.1 Loop initialization state machine
Figure 11. Loop initialization state machine
8.3 Accessing another L_Port
Page
8.4 Loop ports
Page
50 Fibre Channel Interface Manual, Rev. D
9.0 Fibre Channel link services
52 Fibre Channel Interface Manual, Rev. D
9.1 Basic link services
Table 18: Basic link services header
Fibre Channel Interface Manual, Rev. D 53
54 Fibre Channel Interface Manual, Rev. D
Table 19: BA_ACC Payload
Page
56 Fibre Channel Interface Manual, Rev. D
9.2 Extended link services
Fibre Channel Interface Manual, Rev. D 57
58 Fibre Channel Interface Manual, Rev. D
Table 22: PLOGI Payload
Fibre Channel Interface Manual, Rev. D 59
Table 23: Port/Node Name format
60 Fibre Channel Interface Manual, Rev. D
Table 24: N_Port Common Service Parameters
Fibre Channel Interface Manual, Rev. D 61
Table 25: Common Features bits
62 Fibre Channel Interface Manual, Rev. D
Table 26: Class Service Parameters
Fibre Channel Interface Manual, Rev. D 63
Table 27: Initiator Control fields
Table 28: Recipient Control fields
Page
Fibre Channel Interface Manual, Rev. D 65
Table 30: Port Login Accept Payload (PLOGI ACC)
66 Fibre Channel Interface Manual, Rev. D
Table 31: LOGO Payload
Table 32: PLOGO Accept
Fibre Channel Interface Manual, Rev. D 67
Table 33: FLOGI Payload
68 Fibre Channel Interface Manual, Rev. D
Table 34: F_Port Common Service Parameters
Fibre Channel Interface Manual, Rev. D 69
Table 35: Common Features bits
70 Fibre Channel Interface Manual, Rev. D
Table 36: Class 3 Service Parameters
Table 37: Service Option Class 3 fields
Fibre Channel Interface Manual, Rev. D 71
Table 38: Fabric Login Accept Payload (FLOGI ACC)
72 Fibre Channel Interface Manual, Rev. D
Table 39: PRLI Payload
Fibre Channel Interface Manual, Rev. D 73
74 Fibre Channel Interface Manual, Rev. D
Table 40: PRLI Accept Payload
Fibre Channel Interface Manual, Rev. D 75
76 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 77
Table 41: PRLO Payload
78 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 79
Table 42: PRLO Accept Payload
80 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 81
Table 43: TPRLO Payload
82 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 83
Table 44: TPRLO Accept Payload
84 Fibre Channel Interface Manual, Rev. D
Page
86 Fibre Channel Interface Manual, Rev. D
Table 46: RLS Accept Payload
Fibre Channel Interface Manual, Rev. D 87
88 Fibre Channel Interface Manual, Rev. D
Table 47: RRQ Payload
Fibre Channel Interface Manual, Rev. D 89
Table 48: RRQ Accept Payload
Page
Page
92 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 93
Table 50: ADISC Accept Payload
94 Fibre Channel Interface Manual, Rev. D
Table 51: RNC Payload
Table 52: Capability Entries
Fibre Channel Interface Manual, Rev. D 95
96 Fibre Channel Interface Manual, Rev. D
Table 53: LS_RJT Payload
Fibre Channel Interface Manual, Rev. D 97
9.3 FC common transport
98 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 99
Table 55: RFT_ID Payload
100 Fibre Channel Interface Manual, Rev. D
10.0 Enclosure services interface (ESI)
10.1 Discovery process
10.2 8045 mode
Page
10.3 8067 mode
Page
10.4 ESI command transfer
10.5 Enclosure-initiated ESI transfer
Page
Page
Page
Fibre Channel Interface Manual, Rev. D 111
Note. The Page Code is always 00h for Enclosure Initiated ESI.
Table 62: Initiate LIP Action Specific Bits
112 Fibre Channel Interface Manual, Rev. D
Table 63: Enclosure Initiated ESI Page Format
Fibre Channel Interface Manual, Rev. D 113
10.5.3.1 Device Standard Inquiry Data page
Table 64: Device Standard Inquiry Data page
114 Fibre Channel Interface Manual, Rev. D
10.5.3.2 Device Address page
Table 65: Device Address page
Fibre Channel Interface Manual, Rev. D 115
116 Fibre Channel Interface Manual, Rev. D
10.5.3.3 Loop Position Map page
Table 66: Loop Position Map page
Fibre Channel Interface Manual, Rev. D 117
10.5.3.4 Device Identification page
Table 67: Device Identification page
118 Fibre Channel Interface Manual, Rev. D
10.5.3.5 Device Temperature page
Table 68: Device Temperature page
Fibre Channel Interface Manual, Rev. D 119
10.5.3.6 Port Parameters page
Table 69: Port Parameters page
120 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 121
Table 70: Link Status page (Continued)
122 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 123
10.5.3.8 Spin-Down Control Action Specific Bits
10.5.3.8.1 Spin-Down Control Status
Table 71: Spin-Down Control Action Specific Bits
Table 72: Spin-Down Control Status
Page
11.0 SCSI operations
11.1 SCSI-FCP
11.2 FCP CMND
Fibre Channel Interface Manual, Rev. D 127
128 Fibre Channel Interface Manual, Rev. D
Table 75: FCP CMND Payload
Fibre Channel Interface Manual, Rev. D 129
Page
Fibre Channel Interface Manual, Rev. D 131
Table 77: Typical CDB for six-byte commands
Table 78: Typical CDB for ten-byte commands
Page
Page
134 Fibre Channel Interface Manual, Rev. D
11.3 FCP XFER RDY
Fibre Channel Interface Manual, Rev. D 135
136 Fibre Channel Interface Manual, Rev. D
Table 81: FCP XFER RDY Payload
Fibre Channel Interface Manual, Rev. D 137
11.4 FCP DATA
The payload of FCP DATA frames transfer the user data associated with a command.
Table 82: FCP DATA frame header
138 Fibre Channel Interface Manual, Rev. D
Table 83: Frame Control bit descriptions
Fibre Channel Interface Manual, Rev. D 139
11.5 FCP RSP
Fibre Channel Interface Manual, Rev. D 141
142 Fibre Channel Interface Manual, Rev. D
Table 85: FCP RSP Payload
Fibre Channel Interface Manual, Rev. D 143
*Fibre Channel frame byte number shown in parenthesis.
Table 86: Response Information format
144 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 145
*Fibre Channel frame byte number shown in parenthesis.
Table 87: Disc Drive Extended Sense Data Summary
146 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 147
Table 88: Sense Key Specific reference tables
Table 89: Field Pointer bytes
148 Fibre Channel Interface Manual, Rev. D
Table 90: Actual Retry Count bytes
Table 91: Format Indication bytes
Fibre Channel Interface Manual, Rev. D 149
150 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 151
Table 93: Error codes for bytes 12 and 13 of sense data (values are in hexadecimal) (Continued)
152 Fibre Channel Interface Manual, Rev. D
Table 93: Error codes for bytes 12 and 13 of sense data (values are in hexadecimal) (Continued)
Page
11.6 Parameter rounding
12.0 Commands
156 Fibre Channel Interface Manual, Rev. D
Table 94: Commands sorted by command name
Fibre Channel Interface Manual, Rev. D 157
Table 94: Commands sorted by command name (Continued)
158 Fibre Channel Interface Manual, Rev. D
Table 95: Commands sorted by operation code
Fibre Channel Interface Manual, Rev. D 159
Table 95: Commands sorted by operation code
Page
12.5 Format Unit command
162 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 163
Table 97: Format Unit parameter definition (format variations)
164 Fibre Channel Interface Manual, Rev. D
12.5.1 Format Unit parameter list
12.5.1.1 Defect List header
Table 98: Defect List header
Fibre Channel Interface Manual, Rev. D 165
Table 99: Initialization Pattern descriptor
Table 100: Initialization Pattern Modifier
Page
Page
168 Fibre Channel Interface Manual, Rev. D
12.6 Inquiry command
Table 104: Inquiry command (12h)
Page
170 Fibre Channel Interface Manual, Rev. D
Table 105: Disc drive inquiry data format
Fibre Channel Interface Manual, Rev. D 171
172 Fibre Channel Interface Manual, Rev. D
Page
174 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 175
176 Fibre Channel Interface Manual, Rev. D
Table 111: Identification Descriptor
Fibre Channel Interface Manual, Rev. D 177
Note.
Table 112: Identification Descriptor structure
Page
Fibre Channel Interface Manual, Rev. D 179
12.6.5 Firmware Numbers page (C0h) Table 113: Firmware Numbers page (C0h)
180 Fibre Channel Interface Manual, Rev. D
12.6.6 Date Code page (C1h) Table 114: Date Code page (C1h)
Fibre Channel Interface Manual, Rev. D 181
12.6.7 Jumper Settings page (C2h) Table 115: Jumper Settings page (C2h)
182 Fibre Channel Interface Manual, Rev. D
Table 116: AL_PA Select-ID mapping
Fibre Channel Interface Manual, Rev. D 183
Table 117: Device Behavior page (C3h)
184 Fibre Channel Interface Manual, Rev. D
12.7 Lock-Unlock Cache (10) command
Fibre Channel Interface Manual, Rev. D 185
12.8 Lock-Unlock Cache (16) command
Page
12.9 Log Select command
188 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 189
The Log Select and Log Sense commands use the same log page format. See Section 12.10.
Table 121: Log Select Command field setting summary
190 Fibre Channel Interface Manual, Rev. D
12.10 Log Sense command
Table 122: Log Sense command (4Dh)
Fibre Channel Interface Manual, Rev. D 191
Table 123: Log Page format
192 Fibre Channel Interface Manual, Rev. D
Table 124: Log Parameter structure
Fibre Channel Interface Manual, Rev. D 193
194 Fibre Channel Interface Manual, Rev. D
Table 125: Threshold Met Criteria
Table 126: Log Page codes
Fibre Channel Interface Manual, Rev. D 195
Table 127: Supported log pages
196 Fibre Channel Interface Manual, Rev. D
Table 128: Write, Read, Read Reverse, and Verify Error Parameter Code field
Page
198 Fibre Channel Interface Manual, Rev. D
Table 130: Temperature log page (code 0Dh)
Table 131: Temperature Parameter Format
Fibre Channel Interface Manual, Rev. D 199
Table 132: Command Initiate Parameter Format
Table 133: Fibre Channel Link Format
200 Fibre Channel Interface Manual, Rev. D
Page
202 Fibre Channel Interface Manual, Rev. D
Table 135: Device Self-Test Results Log parameter data format
Fibre Channel Interface Manual, Rev. D 203
Page
Page
12.11 Mode Select (6) command
Page
208 Fibre Channel Interface Manual, Rev. D
Table 139: Mode Select (6) parameter list
Page
12.12 Mode Select (10) command
Fibre Channel Interface Manual, Rev. D 211
12.13 Mode Sense (6) command
Table 142: Mode Sense command (1Ah)
Page
Fibre Channel Interface Manual, Rev. D 213
Table 143: Mode Sense (6) parameter list
214 Fibre Channel Interface Manual, Rev. D
Mode Sense page descriptor header
Table 144: Mode Sense page descriptor header
Fibre Channel Interface Manual, Rev. D 215
Caution:
Table 145: Mode sense page code section reference
216 Fibre Channel Interface Manual, Rev. D
Note. If all JIT bits are set to zero, the drive enables JIT0 only.
Table 146: Unit Attention page (00h)
Fibre Channel Interface Manual, Rev. D 217
218 Fibre Channel Interface Manual, Rev. D
Table 147: Error Recovery page (01h)
Fibre Channel Interface Manual, Rev. D 219
220 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 221
Table 148: Disconnect/Reconnect Control page (02h)
222 Fibre Channel Interface Manual, Rev. D
Page
224 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 225
226 Fibre Channel Interface Manual, Rev. D
Table 150: Rigid Disc Drive Geometry Parameters page (04h)
Fibre Channel Interface Manual, Rev. D 227
228 Fibre Channel Interface Manual, Rev. D
Table 151: Verify Error Recovery page (07h)
Fibre Channel Interface Manual, Rev. D 229
230 Fibre Channel Interface Manual, Rev. D
Table 152: Caching Parameters page (08h)
Fibre Channel Interface Manual, Rev. D 231
232 Fibre Channel Interface Manual, Rev. D
Note.
Fibre Channel Interface Manual, Rev. D 233
Table 153: Control Mode page (0Ah)
234 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 235
Table 154: Notch page (0Ch)
236 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 237
Table 155: XOR Control Mode page (10h)
238 Fibre Channel Interface Manual, Rev. D
Page
240 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 241
Table 157: Power Condition page (1Ah)
Page
Page
244 Fibre Channel Interface Manual, Rev. D
Table 159: Method of Reporting Informational Exceptions field
Fibre Channel Interface Manual, Rev. D 245
12.14 Mode Sense (10) command
Fibre Channel Interface Manual, Rev. D 247
Table 161: Mode Sense (10) data
Page
12.16 Persistent Reserve In command
250 Fibre Channel Interface Manual, Rev. D
Table 163: Persistent Reserve In parameter data for read keys
Fibre Channel Interface Manual, Rev. D 251
Table 164: Persistent Reserve In parameter data for read reservation
252 Fibre Channel Interface Manual, Rev. D
Table 165: Persistent Reserve In Reservation Descriptor
Fibre Channel Interface Manual, Rev. D 253
12.17 Persistent Reserve Out command
Fibre Channel Interface Manual, Rev. D 255
Page
Fibre Channel Interface Manual, Rev. D 257
Table 168: Persistent Reserve Out service actions and valid parameters
258 Fibre Channel Interface Manual, Rev. D
12.18 Prefetch (10) command
Fibre Channel Interface Manual, Rev. D 259
12.19 Prefetch (16) command
260 Fibre Channel Interface Manual, Rev. D
Page
12.21 Read (6) command
Page
264 Fibre Channel Interface Manual, Rev. D
12.22 Read (10) command
Table 172: Read (10) command (28h)
Page
266 Fibre Channel Interface Manual, Rev. D
12.23 Read (12) command
Page
268 Fibre Channel Interface Manual, Rev. D
12.24 Read (16) command (88h)
Page
270 Fibre Channel Interface Manual, Rev. D
12.25 Read Buffer command
Table 175: Read Buffer command (3Ch)
Page
Page
Fibre Channel Interface Manual, Rev. D 273
12.26 Read Capacity (10) command
Table 178: Read Capacity (10) command (25h)
Page
Fibre Channel Interface Manual, Rev. D 275
12.27 Read Capacity (16) command
276 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 277
12.28 Read Defect Data (10) command
Table 182: Read Defect Data command (37h)
Page
Fibre Channel Interface Manual, Rev. D 279
Table 183: Defect List Header description
12.29 Read Defect Data (12) command
Page
282 Fibre Channel Interface Manual, Rev. D
Table 185: Defect List (12) Header description
Page
284 Fibre Channel Interface Manual, Rev. D
12.31 Read Long command
Table 186: Read Long command (3Eh)
12.32 Reassign Blocks command
Page
12.33 Receive Diagnostic Results command
288 Fibre Channel Interface Manual, Rev. D
Table 190: Receive Diagnostics page code descriptions
Table 191: Supported Diagnostic Pages format
Table 192: Supported Send Diagnostic pages
Fibre Channel Interface Manual, Rev. D 289
Enclosure Services Information (ESI)
Table 193: SCSI Enclosure Services Information (ESI) page format
290 Fibre Channel Interface Manual, Rev. D
Table 194: Translate Address pageReceive Diagnostic
Fibre Channel Interface Manual, Rev. D 291
Table 195: Address field logical block address format
Table 196: Address field physical sector address format
292 Fibre Channel Interface Manual, Rev. D
Table 197: Default self-test diagnostic data bytes
Page
294 Fibre Channel Interface Manual, Rev. D
12.36 Report Device Identifier command
Table 198: Report Device Identifier command (A4h)
Page
296 Fibre Channel Interface Manual, Rev. D
12.37 Report LUNs command
Fibre Channel Interface Manual, Rev. D 297
12.38 Request Sense command
Page
Page
Fibre Channel Interface Manual, Rev. D 301
Table 203: Parameter list format for third-party addressing
Page
Fibre Channel Interface Manual, Rev. D 303
12.46 Seek (10) command
Table 204: Seek (10) command (2Bh)
12.47 Send Diagnostic command
Fibre Channel Interface Manual, Rev. D 305
Table 206: Supported Send Diagnostic pages
Table 207: SCSI Enclosure Services Information (ESI) page format
306 Fibre Channel Interface Manual, Rev. D
Page
308 Fibre Channel Interface Manual, Rev. D
Table 209: Translate Address pageSend Diagnostic command
Page
310 Fibre Channel Interface Manual, Rev. D
12.48 Set Device Identifier command
Table 211: Set Device Identifier command (A4h)
Fibre Channel Interface Manual, Rev. D 311
Table 212: Report Device Identifier parameter list
Page
12.50 Start/Stop Unit command
314 Fibre Channel Interface Manual, Rev. D
12.51 Synchronize Cache (10) command
Table 214: Synchronize Cache (10) command (35h)
Fibre Channel Interface Manual, Rev. D 315
12.52 Synchronize Cache (16) command
Table 215: Synchronize Cache (16) command (91h)
12.53 Test Unit Ready command
Fibre Channel Interface Manual, Rev. D 317
12.54 Verify (10) command
Table 217: Verify (10) command (2Fh)
318 Fibre Channel Interface Manual, Rev. D
12.55 Verify (12) command
Table 218: Verify (12) command (AFh)
Page
320 Fibre Channel Interface Manual, Rev. D
12.56 Verify (16) command
Table 219: Verify (16) command (8Fh)
Page
12.57 Write (6) command
Page
324 Fibre Channel Interface Manual, Rev. D
12.58 Write (10) command
trol.
Table 221: Write (10) command (2Ah)
Page
326 Fibre Channel Interface Manual, Rev. D
12.59 Write (12) command
trol.
Table 222: Write (12) command (AAh)
Page
328 Fibre Channel Interface Manual, Rev. D
12.60 Write (16) command
trol.
Table 223: Write (16) command (8Ah)
Page
330 Fibre Channel Interface Manual, Rev. D
12.61 Write and Verify (10) command
Table 224: Write and Verify (10) command (2Eh)
Fibre Channel Interface Manual, Rev. D 331
12.62 Write and Verify (12) command
Table 225: Write and Verify (12) command (AEh)
Page
Fibre Channel Interface Manual, Rev. D 333
12.63 Write and Verify (16) command
Table 226: Write and Verify (16) command (8Eh)
334 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 335
12.64 Write Buffer command
Table 227: Write Buffer command (3Bh)
336 Fibre Channel Interface Manual, Rev. D
Table 228: Mode definitions
Page
Page
Fibre Channel Interface Manual, Rev. D 339
12.65 Write Long command
Table 230: Write Long command (3Fh)
340 Fibre Channel Interface Manual, Rev. D
12.66 Write Same (10) command
Table 231: Write Same (10) command (41h)
Fibre Channel Interface Manual, Rev. D 341
12.67 Write Same (16) command
Table 232: Write Same (16) command (93h)
12.68 XDRead (10) command
12.69 XDRead (32) command
344 Fibre Channel Interface Manual, Rev. D
12.70 XDWrite (10) command
346 Fibre Channel Interface Manual, Rev. D
12.71 XDWrite (32) command
348 Fibre Channel Interface Manual, Rev. D
Fibre Channel Interface Manual, Rev. D 349
12.72 XDWriteRead (10) command
Table 237: XDWriteRead (10) command (53h)
350 Fibre Channel Interface Manual, Rev. D
12.73 XDWriteRead (32) command
Table 238: XDWriteRead (32) command (7Fh)
Fibre Channel Interface Manual, Rev. D 351
352 Fibre Channel Interface Manual, Rev. D
12.74 XPWrite (10) command
Table 239: XPWrite (10) command (51h)
Fibre Channel Interface Manual, Rev. D 353
12.75 XPWrite (32) command
Table 240: XPWrite (32) command (7Fh)
354 Fibre Channel Interface Manual, Rev. D
13.0 Drive features
13.1 Self-Monitoring Analysis and Reporting Technology
13.2 Self-test operations
Page
Page
358 Fibre Channel Interface Manual, Rev. D
Table 241: Device Self-test mode summary
14.0 Seagate Technology support services
Online Services
Internet
mySeagate
reseller.seagate.com
Presales, Technical Support and Customer Service
Presales Support
Technical Support
Authorized Service Centers
USA/Canada/Latin America Support Services
European Support Services
Toll-Free Support Numbers
FAX ServicesAll European Countries (toll call)
Africa/Middle East Support Services
Asia/Pacific Support Services
Appendix A. Glossary
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Page
Index
Numerics
A
B
C
D
Page
E
F
G
H
I
J
L
Page
M
N
O
P
Page
Page
Page
Q
R
Page
S
Page
T
U
V
W
X
88 Fibre Channel Interface Manual, Rev. D9.2.8 Reinstate Recovery Qualifier (RRQ)The Reinstate Recovery Qualifier (RRQ) is sent by the initiator to the drive to indicate the Recovery Qualifier (S_ID, D_ID, OX_ID, RX_ID, SEQ_ID, and SEQ_CNT) for an aborted exchange may be reused. The drive allows reuse of the Recovery Qualifier immediately after sending the accept to an ABTS and does not require RRQ. It returns accepts to all RRQs.