Fujitsu MHZ2250BJ Manuel d'utilisateur Page 202
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Interface
(30) SECURITY UNLOCK (X 'F2')
This command cancels LOCKED MODE.
The host transfers the 512-byte data shown in Table 5.37 to the device. Operation
of the device varies as follows depending on whether the host specifies the master
password.
• When the master password is selected
When the security level is LOCKED MODE is high, the password is compared
with the master password already set. If the passwords are the same, LOCKED
MODE is canceled. Otherwise, the Aborted Command error is returned. If the
security level in LOCKED MODE is set to the maximum level, the Aborted
Command error is always returned.
• When the user password is selected
The password is compared with the user password already set. If the passwords
are the same, LOCKED MODE is canceled. Otherwise, the Aborted Command
error is returned.
If the password comparison fails, the device decrements the UNLOCK counter.
The UNLOCK counter initially has a value of five. When the value of the
UNLOCK counter reaches zero, this command or the SECURITY ERASE UNIT
command causes the Aborted Command error until the device is turned off and
then on. Issuing this command with LOCKED MODE canceled (in UNLOCK
MODE) has no affect on the UNLOCK counter.
Table 5.37 Contents of security password
Word Contents
0 Control word
Bit 0: Identifier
0 = Compares the user passwords.
1 = Compares the master passwords.
Bits 1 to 15: Reserved
1 to 16 Password (32 bytes)
17 to 255 Reserved
5-128 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
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