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Figure 20 shows an alternative method of protecting RAID-5 arrays against the
complete failure of an SSA Enclosure. This method uses a different hot spare disk drive
to protect each member of the array.
Pool A2
Pool A3
hdisk hdisk
Pool A1
Enclosure-1
Enclosure-2
Enclosure-3
pdisk
pdisk
pdisk
pdisk
pdisk
pdisk
Spare
Spare
Spare
Figure 20. Pools along, and Hdisks across, Enclosures
50 User’s Guide and Maintenance Information
- User’s Guide and 1
- Maintenance Information 1
- Contents 5
- Contents v 7
- Contents vii 9
- Contents ix 11
- Contents xi 13
- Contents xiii 15
- Safety Notices 17
- About This Book 19
- Web Support Pages 20
- Numbering Convention 20
- Part 1. User Information 21
- 4 Connector A2 24
- Fast-Write Cache Feature 25
- 128 MB Memory Module Feature 25
- Loops, Links, and Data Paths 27
- Simple Loop 28
- Two Loops with One Adapter 34
- Two Loops with Two Adapters 35
- Large Configurations 36
- Switching Off Using Systems 37
- Switching On Using Systems 37
- SSA Link Speed 38
- Location Code Format 39
- SSA Unique IDs 41
- Rules for SSA Loops 42
- Reserving Disk Drives 47
- Fast-Write Cache 47
- RAID Functions 49
- Availability 49
- RAID-0 Array States 51
- Good State 51
- Offline State 51
- RAID-1 Array States 52
- Rebuilding State 54
- Initial Rebuilding Operation 54
- Disk Drive Replacement 54
- Adapter Replacement 54
- RAID-5 Array State Flowchart 55
- RAID-10 Array States 56
- Exposed State 56
- Degraded State 57
- Unknown State 58
- Multiple States 58
- Building 1 Building 2 66
- Enclosure-1 69
- Enclosure-2 69
- Enclosure-3 69
- Enclosure-4 69
- Adding an SSA RAID Array 80
- Deleting an SSA RAID Array 90
- Adding a New Hot Spare Pool 103
- Service Guide for the unit) 114
- Disk Drive” on page 95 114
- Listing Hot Spare Disk Drives 131
- Listing System Disk Drives 137
- Copying Data from an Array 171
- RAID-10 Array 171
- Figure 24) 180
- Description 181
- Name (2) 188
- Another Using System 189
- Array Copy Services 193
- Prepare a Copy 195
- List All Copy Candidates 199
- List All Uncoupled Copies 201
- Delete a RAID Array Copy 203
- System 1 216
- SSA Adapter 216
- Primary 1 216
- Secondary 1 216
- Split Array Resolution 217
- = Primary 217
- System 2 218
- Split Systems 219
- Secondary 2 220
- Correctly 225
- Fast-Write Cache Card Battery 231
- SRN 42521 238
- and fsdb) to attempt to 239
- SRN 42524 240
- SRN 42525 240
- Chapter 11. SSA Error Logs 241
- Detailed Description 242
- Detail Data Formats 245
- Duplicate Node Test 247
- Error Logging Management 248
- Error Log Analysis 249
- Error Log Analysis Routine 250
- Good Housekeeping 253
- Configurations 255
- Command Syntax 257
- Object Types 258
- Instruct Types 258
- Examples 259
- SSARAID Command Attributes 264
- Arrays Only 265
- RAID Arrays Change Attributes 268
- Return Codes 273
- SSA Subsystem Overview 275
- Device Drivers 275
- Trace Formatting 276
- Device-Dependent Subroutines 278
- Managing Dumps 279
- Return Values 283
- Configuration Issues 286
- Multiple Adapters 287
- Device Attributes 290
- Error Conditions 294
- Special Files 296
- Operation 301
- Device Driver Entry Point 307
- SSA Disk Fencing 310
- SSA Target Mode 311
- Buffer Management 313
- Using SSA Target Mode 314
- SSA tmssa Device Driver 315
- Configuration Information 316
- are not applicable 317
- Implementation Specifics 324
- Related Information 324
- Installing the SSA Adapter 333
- Cron Table Entries 333
- Microcode Maintenance 334
- Exchanging Disk Drives 339
- 5. Refer to Figure 47 353
- Advanced SerialRAID Adapter 356
- 6. Refer to Figure 51 357
- Part Numbers 360
- Required Flags for Both Modes 382
- Required Flags for Copy Mode 382
- Optional Flags for List Mode 382
- Optional Flags for Copy Mode 383
- Chapter 17. SSA Service Aids 393
- The Identify Function 395
- Starting the SSA Service Aids 396
- Set Service Mode Service Aid 398
- Link Verification Service Aid 403
- Format Disk Service Aid 409
- Certify Disk Service Aid 411
- Link Speed Service Aid 416
- Example 1. Normal Loops 421
- The SRN Table 431
- Using the SRN Table 431
- Software and Microcode Errors 461
- How to Use the MAPs 463
- MAP 2010: START 464
- MAP 2320: SSA Link 465
- NO Go to step 5 on page 448 467
- MAP 2324: SSA RAID 474
- SSA Link Errors 498
- SSA Subsystem 499
- SSA Subsystem SSA Subsystem 500
- Link Status (Ready) Lights 501
- Service Aid 502
- Repair Actions 502
- Part 3. Appendixes 503
- Anmerkung: 507
- Glossary 509
- Glossary 491 511
- Numerics 513
- Part Number: 27H0678 530
- Printed in the U.S.A 530
- SA33-3285-02 530
- (1P) P/N: 27H0678 530
- Spine information: 531
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