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USER RESPONSIBLE FOR VERIFYING VERSION AND COMPLETENESS
OEM FUNCTIONAL SPECIFICATION ULTRASTAR XP (DFHC) SSA MODELS 1.12/2.25 GB - 1.0" HIGH
Contents
1.0 Description .................................................... 9
1.1 Features ...................................................... 9
1.1.1 General Features .............................................. 9
1.1.2 Performance Summary .......................................... 9
1.1.3 Interface Controller Features ....................................... 9
1.1.4 Reliability Features ...........................................
10
1.2 Models
..................................................... 10
2.0 Specifications .................................................. 11
2.1 General ..................................................... 11
2.1.1 Capacity Equations ........................................... 13
2.2 Power Requirements by Model ....................................... 15
2.2.1 C1x Models ................................................ 15
2.2.2 C2x Models ................................................ 21
2.2.3 C4x Models ................................................ 27
2.2.4 CxB Models ............................................... 33
2.2.5 Power Supply Ripple .......................................... 34
2.2.6 Grounding Requirements of the Disk Enclosure ........................... 34
2.2.7 Hot plug/unplug support ........................................ 34
2.2.8 Bring-up Sequence (and Stop) Times ................................. 36
3.0 Performance .................................................. 39
3.1 Environment Definition ........................................... 39
3.2 Workload Definition ............................................. 39
3.2.1 Sequential ................................................. 40
3.2.2 Random .................................................. 40
3.3 Command Execution Time ......................................... 40
3.3.1 Basic Component Descriptions ..................................... 40
3.3.2 Comments ................................................ 42
3.4 Approximating Performance for Different Environments ......................... 43
3.4.1 For Different Transfer Sizes ....................................... 44
3.4.2 When Read Caching is Enabled .................................... 44
3.4.3 When Write Caching is Enabled .................................... 44
3.4.4 When Adaptive Caching is Enabled .................................. 44
3.4.5 When Read-ahead is Enabled ...................................... 44
3.4.6 When No Seek is Required ....................................... 45
3.4.7 For Queued Commands ......................................... 45
3.4.8 Out of Order Transfers ......................................... 45
3.5 Skew ...................................................... 46
3.5.1 Cylinder to Cylinder Skew ....................................... 46
3.5.2 Track to Track Skew .......................................... 46
3.6 Idle Time Functions ............................................. 47
3.6.1 Servo Run Out Measurements ..................................... 48
3.6.2 Servo Bias Measurements ........................................ 48
3.6.3 Predictive Failure Analysis ....................................... 48
3.6.4 Channel Calibration ........................................... 48
3.6.5 Save Logs and Pointers ......................................... 49
3.6.6 Disk Sweep ................................................ 49
3.6.7 Summary ................................................. 49
3.7 Command Timeout Limits .......................................... 49
Source filename=STSSHEXT IBM Corporation Page 5 of 87