Contents
Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives vii
6.9.3 Addressing Error Protection..........................................................................................................................6-4
6.9.4 Data Sector Reallocation Error Protection...................................................................................................6-5
6.9.5 Data Verification.............................................................................................................................................6-5
6.10 Tagged Command Queuing..............................................................................................................................6-5
6.11 Command Reordering........................................................................................................................................6-6
6.12 Banded Recording...............................................................................................................................................6-6
6.13 Special Functions.................................................................................................................................................6-6
6.14 Power Management............................................................................................................................................6-6
6.15 Diagnostics...........................................................................................................................................................6-7
6.15.1 Power Up Self Test (POST).........................................................................................................................6-7
6.15.2 Periodic Self-Adjustments.........................................................................................................................6-7
6.15.3 Host Diagnostics.........................................................................................................................................6-8
6.15.4 Log Sense....................................................................................................................................................6-8
6.16 Error Recovery......................................................................................................................................................6-8
6.16.1 Seek Error Recovery....................................................................................................................................6-8
6.16.2 Data Read Errors.........................................................................................................................................6-8
6.16.3 Reallocation of Bad Blocks........................................................................................................................6-9
6.17 The Ultra 160/m Low Voltage Differential (LVD) SCSI Interface....................................................................6-9
6.17.1 Diffsens .....................................................................................................................................................6-10
6.17.2 Diffsens Switching...................................................................................................................................6-11
6.17.3 DT and ST Clocking..................................................................................................................................6-11
6.17.4 Cyclic Redundancy Checking.................................................................................................................6-12
6.17.5 Domain Validation...................................................................................................................................6-12
6.18 Hot Plugging/Removal Insertion of SCSI Devices..........................................................................................6-12
Appendix A QUICK REFERENCE
Appendix B SCSI REFERENCE INFORMATION
B.1 SCSI-2 Bus Timing..................................................................................................................................................B-1
B.2 SCSI-3 Bus Timing..................................................................................................................................................B-4
B.3 Signal States............................................................................................................................................................B-9
B.3.1 Signal Values ................................................................................................................................................B-9
B.3.2 SCSI ID Bits & Priorities ..............................................................................................................................B-10
B.4 SCSI Signals...........................................................................................................................................................B-11
B.5 SCSI Bus Phases....................................................................................................................................................B-12
B.5.1 BUS FREE Phase ..........................................................................................................................................B-12
B.5.2 ARBITRATION Phase ..................................................................................................................................B-13
B.5.3 SELECTION Phase .......................................................................................................................................B-14
B.5.4 RESELECTION Phase ...................................................................................................................................B-15
B.5.5 Information Transfer Phases .....................................................................................................................B-17
B.5.5.1 Asynchronous Data Transfer .........................................................................................................B-18
B.5.5.2 Synchronous Data Transfer ...........................................................................................................B-19
B.5.5.3 Wide Data Transfer .........................................................................................................................B-21
B.5.5.4 Signal Restrictions Between Phases .............................................................................................B-21
B.5.5.5 Message Out – Attention Conditions ..........................................................................................B-21
B.6 SCSI Bus Conditions.............................................................................................................................................B-23
B.6.1 Attention Condition ..................................................................................................................................B-23
B.6.2 Reset Condition ..........................................................................................................................................B-24
