IBM SSA User bytes/sector ub/sct, Sectors/logical block sct/lba, User bytes/logical block ub/lba

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U S E R RESPONSIBLE F O R V E R I F Y I N G VERSION A N D COMPLETENESS

O E M F U N C T I O N A L S P E C I F I C A T I O N U L T R A S T A R X P ( D F H C ) SSA M O D E L S 1.12/2.25 G B - 1.0" H I G H

Total Cylinders (tcyl) & User Cylinders (ucyl)

Notch #1

Notch #2

Notch #3

Notch #4

Notch #5

Notch #6

Notch #7

Notch #8

Notch #9

Notch #10

Sum of all Notches

Spares Sectors/cylinder (spr/cyl)

Notch #1

Notch #2

Notch #3

Notch #4

Notch #5

Notch #6

Notch #7

Notch #8

Notch #9

Notch #10

Last cylinder extra spares (lcspr)

All models	C4x Models	C2x Models	C1x Models
tcyl	ucyl	ucyl	ucyl

1893	1879	1877	1872
956	955	955	955
49	48	48	48
310	309	309	309
349	348	348	348
116	115	115	115
214	213	213	213
190	189	189	189
131	130	130	130
208	206	206	206


4416	4392	4390	4385

C4x Models	C2x Models	C1x Models

40	20	10
40	20	10
38	19	10
37	19	9
36	18	9
34	17	9
33	17	8
32	16	8
31	16	8
30	15	7

60	30	14

User bytes/sector (ub/sct)	256 - 744 (even number of bytes only)
Sectors/logical block (sct/lba)	1-8
	The lowest sct/lba that satisfies the following rules is used...
	1.	Block Length is evenly divisible by a number 2-8.
	2.	Quotient of previous equation is evenly divisible by 2.
	3.	Quotient must be ³ 256 and £ 744.
User bytes/logical block (ub/lba)	256 - 5952 (See rules for determining sct/lba above for determining sup-
	ported ub/lba values.)
Sectors/track (sct/trk)	(See Table 1 on page 13 or contact an IBM Customer Representative
	for other block lengths.)

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I B M Corporation

Source filename=SPECS

Image 12

Contents Form Factor Disk Drive Version BM Corporation Preface Source filename=STSSHEXT When Reliability Operating LimitsContaminants Acoustic Levels Source filename=STSSHEXT Features General FeaturesInterface Controller Features DescriptionReliability Features ModelsSpecifications GeneralUser bytes/sector ub/sct Sectors/logical block sct/lbaUser bytes/logical block ub/lba Sectors/track sct/trkCapacity Equations For Each NotchFor Entire Drive Power Requirements by Model 1 C1x ModelsInput Voltage + 5 Volts Supply + 1 2 Volts SupplyPower Calculation Examples Example 3. Power CalculationExample 1. Calculate the mean 12 volt average current Things to check when measuring 12 V supply current Example 4. Calculate the 12 volt peak currentVolt current during read/write operations C1x Models Typical 12 volt current C1x Models Typical 12 volt spin-up current C1x Models 2 C2x Models Power Calculation Examples Example 4. Calculate the 12 volt peak current Volt current during read/write operations C2x Models Typical 12 volt current C2x Models Typical 12 volt spin-up current C2x Models 3 C4x Models Power Calculation Examples Example 4. Calculate the 12 volt peak current Volt current during read/write operations C4x Models Typical 12 volt current C4x Models Typical 12 volt spin-up current C4x Models Power supply methods CxB Models4.2 DC/DC Converter Grounding Requirements of the Disk Enclosure Hot plug/unplug supportM Corporation Bring-up Sequence and Stop Times Event Nominal MaximumBring-up Sequence Times and Stop Time for C2x Models Source filename=PERFORM Performance Environment DefinitionWorkload Definition # of segments Ub/lba +Command Execution Time SequentialRandom Basic Component DescriptionsData Transfer to/from Disk Comments Data Transfer to/from SSA LinkApproximating Performance for Different Environments Theoretical Data Sector Transfer RateWhen Read Caching is Enabled When Write Caching is EnabledWhen Adaptive Caching is Enabled When Read-ahead is EnabledWhen No Seek is Required For Queued CommandsReordered Commands Back-To-Back CommandsSkew Cylinder to Cylinder SkewTrack to Track Skew Idle Time Functions Servo Run Out Measurements Servo Bias MeasurementsPredictive Failure Analysis Channel CalibrationCommand Timeout Limits Save Logs and PointersDisk Sweep M Corporation Weight and Dimensions MechanicalSmall Form Factor Models CxC ClearancesDimensions are in millimeters Location of Side Mounting Holes of C4C Models Source filename=MECHANIC Unitized Connector Locations Source filename=MECHANIC Carrier Models CxB Dimensions CxB Models M Corporation Handle Docking and Ejection System Auto-docking Assembly Side Rails Side Rail Positioning Electrical Connector and Indicator Locations E D Locations front view CxB Models M CorporationSSA Unitized Connector Electrical InterfaceCarrier Connector PinRow SSA Link Electrical Characteristics Option Pins and IndicatorsSSA Link Cable Device Activity Pin/Indicator Option Port Pin Device Fault Pin/Indicator Option Port PinWrite Protect Option Port Pin Ground long Option Port PinFront Jumper Connector Early Power Off Warning or Power Fail Power Port Pin12 12V Charge and 5V Charge Power Port pin 1 Programmable pin 1 Option Port PinSpindle Synchronization Over Sync Hard-wire M Corporation Source filename=RELIABLE Error Detection Seek Error RatePower On Hours Examples ReliabilityPower on/off cycles Useful LifeMaximum on/off cycles Product LifeInstall Defect Free Mean Time Between Failure *MTBFSpql Shipped product quality level Sample Failure Rate ProjectionsPeriodic Maintenance Connector Insertion CyclesInstall Defect Free percentage Percent ESD ProtectionTemperature Measurement Points Operating LimitsMaximum Reliability P F E TTemperature Measurement Points for all Models bottom view Vibration and ShockDrive Mounting Guidelines Output Vibration LimitsOperating Vibration Nonoperating Vibration V4SContaminants Operating ShockNonoperating Shock Upper Limit Sound Power Requirements Bels for C4x Models Acoustic LevelsSource filename=STANDARD Safety StandardsElectromagnetic Compatibility EMC M Corporation Bibliography Serial Storage Architecture S S a P H Transport