Fujitsu MHZ2250BJ Manuel d'utilisateur Page 278
- Page / 320
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Operations
6.4.3 Using the read segment buffer
Methods of using the read segment buffer are explained for following situations.
6.4.3.1 Miss-hit
In this situations, the top block of read requested data is not stored at all in the data
buffer. As a result, all of the read requested data is read from disk media.
1) HAP (host address pointer) and DAP (disk address pointer) are defined in the
head of the segment allocated from Buffer. (If pre-read is executed, HAP is
set at the requested data reading position.)
Read segment
HAP (host address
p
ointer)
DAP (disk address pointer)
2) During reading of read requested data, the request data that has already been
read is sent to the host system.
Read requested data Free space
HAP
DAP
Read requested data is
stored until this point
3) When reading of read requested data is completed and transfer of the read
requested data to the host system is completed, reading of the disk continues
until a certain amount of data is stored.
Read requested data
Read-ahead data
DAP
HAP (stop)
4) The following cache valid data is for the read command that is executed next:
Cache valid data
START LBALAST LBA
6-16 C141-E280
- FOR SAFE OPERATION 2
- Revision History 3
- Preface 5
- Operating Environment 6
- Conventions 7
- Attention 7
- Liability Exception 7
- Hot Plug 8
- Important Alert Items 9
- Manual Organization 11
- Contents 13
- Illustrations 19
- CHAPTER 1 Device Overview 23
- 1.1 Features 24
- 1.1.3 Interface 25
- 1.2 Device Specifications 27
- 1.3 Power Requirements 30
- 1.5 Acoustic Noise 34
- 1.6 Shock and Vibration 34
- 1.7 Reliability 35
- (2) Positioning error 36
- 2.1 Device Configuration 42
- 2.2 System Configuration 43
- This page is intentionally 44
- blank 44
- 3.1 Dimensions 46
- 3.2 Mounting 47
- Mounting screw hole 51
- Cable connection 51
- 3.3.1 Device connector 53
- Installation Conditions 54
- 3-10 C141-E280 54
- 4.1 Outline 58
- 4.2 Subassemblies 58
- 4.3 Circuit Configuration 59
- 4.4 Power-on Sequence 62
- Power-on 63
- 4.5 Self-calibration 64
- 4.6 Read/write Circuit 66
- 4.6.3 Read circuit 67
- 4.6.4 Digital PLL circuit 67
- 4.7 Servo Control 68
- Diameter 71
- 4.7.3 Servo frame format 72
- 4.7.5 Spindle motor control 74
- CHAPTER 5 Interface 75
- 5.1 Physical Interface 76
- COMRESET/COMINIT 78
- 106.7 ns 78
- 106.7 ns 106.7 ns 78
- 5.1.4 Connector pinouts 81
- 5.1.5 P11 function 82
- 5.1.6 Hot Plug 84
- 5.2 Logical Interface 85
- 5.2.1 Communication layers 86
- 5.3 Host Commands 101
- Interface 102
- 5-28 C141-E280 102
- 5.3.2 Command descriptions 104
- SN Sector count (15-8) 117
- FR Field = 03 (Mode3) 118
- 5-90 C141-E280 164
- 5.3 Host Commands 165
- Bit 0: Reserved 185
- Setup FIS 185
- → Low Power Idle 197
- → Low Power Idle → Standby 197
- 01h (*1) 198
- • SET MAX ADDRESS 212
- • Description 218
- Sector offset (7-0) 223
- • SCT WRITE DATA (SN = E1h) 237
- Table 5.43 Operation mode 240
- 5.3.3 Error posting 247
- 5.4 Command Protocol 249
- 5.4 Command Protocol 251
- PIO Setup 253
- 5-186 C141-E280 260
- C141-E280 5-187 261
- 5-188 C141-E280 262
- CHAPTER 6 Operations 263
- 6.1 Reset and Diagnosis 264
- earlier than the host) 265
- C141-E280 6-3 265
- 6.1.2 Response to COMRESET 266
- • Security mode state 267
- • SECURITY FREEZE LOCK 267
- • SECURITY UNLOCK 267
- 6.2 Power Save 270
- 6.2.2 Power commands 272
- 6.4 Read-ahead Cache 275
- 6.4.2 Caching operation 276
- 279
- Cache valid data 281
- START LBA 281
- LAST LBA 281
- 6.5 Write Cache 282
- IMPORTANT 283
- 7.1 Maintenance 286
- 7.1.3 Maintenance levels 289
- Disk drive 290
- Firmware 290
- A2 Revision 291
- A3 Revision 291
- 7.1.6 Self-diagnostics 292
- 7.1.7 Test 292
- Figure 7.3 Test flowchart 293
- C141-E280 7-9 293
- 7.2 Operation Confirmation 295
- 7.5 Spare Disk Drive 299
- Glossary 301
- Acronyms and Abbreviations 305
- Comment Form 315
- C141-E280-01EN 317
Produits connexes et manuels pour Matériel Fujitsu MHZ2250BJ
Matériel Fujitsu MHV2120AT Manuel d'utilisateur
(280 pages)
(280 pages)
Matériel Fujitsu MHT2060BH Manuel d'utilisateur
(264 pages)
(264 pages)
Matériel Fujitsu MPD3XXXAT Manuel d'utilisateur
(191 pages)
(191 pages)
Matériel Fujitsu MBA3073NP Manuel d'utilisateur
(138 pages)
(138 pages)
Matériel Fujitsu MAP3735FC Manuel d'utilisateur
(114 pages)
(114 pages)
© 2020, manymanuals.fr. Tous droits réservés | 0.025 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Commentaires sur ces manuels