IBM C1B 1.12 Brick On Sled Carrier 128-pin HPC, C1C 1.12 3.5-inch Small FF 38-pin Unitized, C2B 2.25 Brick On Sled carrier 128-pin HPC, C4B 4.51 Brick On Sled carrier 128-pin HPC, C4C 4.51 3.5-inch Small FF 38-pin Unitized, SSA 5.7.5.2 Over Sync Hard-wire

USER RESPONSIBLE FOR VERIFYING VERSION AND COMPLETENESS

OEM FUNCTIONAL SPECIFICATION ULTRASTAR XP (DFHC) SSA MODELS 1.12/2.25 GB -1.0" HIGH

The spindle synchronization timing requirements are met in a string composed of Ultrastar XP SSA drives

when there are no more than seventeen drives between the one operating in Master Sync mode and the

furthest drive operating in Slave Sync mode.

5.7.5.2 Over Sync Hard-wire

There will be a single wire that connects all the drives together throught the SSA Option Port pin 3 (- Sync

pin). One of these drives will be a Master drive. T wo potential configurations of this hard-wire connection

are shown in the following figures:

Figure 21. Two examples of Daisy-Chain Connection of Synchronization .

Source filename=SYNCIBM CorporationPage 70 of 87

Contents

Main Page Preface Page Contents Page Page Page 1.0 Description 1.1 Features 1.1.1 General Features 1.1.2 Performance Summary 1.1.3 Interface Controller Features 1.2 Models 2.0 Specifications 2.1 General Page 2.1.1 Capacity Equations 2.1.1.1 For Each Notch 2.1.1.2 For Entire Drive 2.2 Power Requirements by Model 2.2.1 C1x Models 2.2.1.1 Power Calculation Examples Page Page Page Page 2.2.2 C2x Models 2.2.2.1 Power Calculation Examples Page Page Page Page 2.2.3 C4x Models 2.2.3.1 Power Calculation Examples Page Page Page Page 2.2.4 CxB Models 2.2.4.1 Power supply methods 2.2.4.2 DC/DC Converter 2.2.5 Power Supply Ripple 2.2.6 Grounding Requirements of the Disk Enclosure 2.2.7 Hot plug/unplug support Page 2.2.8 Bring-up Sequence (and Stop) Times Page Page 3.0 Performance 3.1 Environment Definition 3.2 Workload Definition 3.2.1 Sequential 3.2.2 Random 3.3 Command Execution Time 3.3.1 Basic Component Descriptions Page 3.3.2 Comments 3.3.2.1 Theoretical Data Sector Transfer Rate 3.4 Approximating Performance for Different Environments 3.4.1 For Different Transfer Sizes 3.4.2 When Read Caching is Enabled 3.4.3 When Write Caching is Enabled 3.4.4 When Adaptive Caching is Enabled 3.4.5 When Read-ahead is Enabled 3.4.6 When No Seek is Required 3.4.7 For Queued Commands 3.4.7.1 Reordered Commands 3.4.7.2 Back-To-Back Commands 3.4.8 Out of Order Transfers 3.5 Skew 3.5.1 Cylinder to Cylinder Skew 3.5.2 Track to Track Skew 3.6 Idle Time Functions 3.6.1 Servo Run Out Measurements 3.6.2 Servo Bias Measurements 3.6.3 Predictive Failure Analysis 3.6.4 Channel Calibration 3.6.5 Save Logs and Pointers 3.7 Command Timeout Limits Page 4.0 Mechanical 4.1 Small Form Factor Models (CxC) 4.1.1 Weight and Dimensions 4.1.2 Clearances 4.1.3 Mounting Page Page Page Page Page 4.2 Carrier Models (CxB) 4.2.1 Weight and Dimensions 4.2.2 Clearances 4.2.3 Mounting Page Page 4.2.4 Auto-docking Assembly Side Rails Page Page 5.0 Electrical Interface 5.1 SSA Unitized Connector 5.2 Carrier Connector Page 5.3 SSA Link Cable 5.4 SSA Link Electrical Characteristics 5.5 Option Pins and Indicators 5.5.1 - Manufacturing Test Mode (Option Port Pin 1) 5.5.2 - Auto Start Pin (Option Port Pin 2) 5.5.4 - Write Protect (Option Port Pin 4) 5.5.5 - Ground long (Option Port Pin 5) 5.5.6 - Device Activity Pin/Indicator (Option Port Pin 6) 5.5.7 + 5V (Option Port Pin 7) 5.5.8 - Device Fault Pin/Indicator (Option Port Pin 8) 5.6 Front Jumper Connector 5.7 Spindle Synchronization 5.7.1 Synchronization overview 5.7.2 Synchronization Mode 5.7.3 Synchronization time 5.7.4 Synchronization with Offset 5.7.5.2 Over Sync Hard-wire Page Page 6.0 Reliability 6.1 Error Detection 6.2 Data Reliability 6.3 Seek Error Rate 6.4 Power On Hours Examples: Page 6.7 *Mean Time Between Failure (*MTBF) 6.7.1 Sample Failure Rate Projections 6.8 SPQL (Shipped product quality level) 6.9 Install Defect Free Page 7.0 Operating Limits 7.1 Environmental 7.1.1 Temperature Measurement Points Page 7.2 Vibration and Shock 7.2.1 Drive Mounting Guidelines 7.2.2 Output Vibration Limits 7.2.3 Operating Vibration 7.2.3.1 Nonoperating Vibration 7.2.4 Operating Shock 7.2.5 Nonoperating Shock 7.3 Contaminants 7.4 Acoustic Levels Page 8.0 Standards 8.1 Safety 8.2 Electromagnetic Compatibility (EMC) Page Bibliography

IBM 5.7.5.2 Over Sync Hard-wire

Models: C1B 1.12 Brick On Sled Carrier 128-pin HPC C1C 1.12 3.5-inch Small FF 38-pin Unitized C2B 2.25 Brick On Sled carrier 128-pin HPC C4B 4.51 Brick On Sled carrier 128-pin HPC C4C 4.51 3.5-inch Small FF 38-pin Unitized SSA