IBM C4C 4.51 3.5-inch Small FF 38-pin Unitized, SSA manual Capacity Equations, For Each Notch

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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

											Notch #

User bytes /			1		2		3		4		5			6		7		8		9			10
logical block

	256		216		216		216		202		195			180		180		180		180			162

	512		135		135		130		126		120			115		112		108		105			100

	520		128		128		128		123		115			112		108		105		102			99

	522		128		128		128		122		115			112		108		105		102			90

	524		128		128		128		120		115			112		108		105		102			90

	528		128		128		126		120		112			112		108		105		101			90

	600		115		115		115		110		102			101		97		90		90			90

	688		102		102		102		98		90			90		90		90		81			78

	744		96		96		96		90		90			90		81		78		77			73

Table	1. Gross sectors per track for several block lengths

			C4x Models								C2x Models							C1x Models

User bytes /			formatted				logical			formatted				logical				formatted				logical
logical block			capacity				blocks /			capacity				blocks /				capacity				blocks /
			(bytes)				drive			(bytes)				drive				(bytes)					drive

	256		3,654,540,800			14,275,550			1,826,312,448					7,134,033			912,135,680					3,563,030

	512		4,512,701,440			8,813,870			2,255,098,368					4,404,489			1,126,337,536					2,199,878

	520		4,375,536,880			8,414,494			2,186,554,760					4,204,913			1,092,119,600					2,100,230

	522		4,374,300,492			8,379,886			2,185,931,898					4,187,609			1,091,803,716					2,091,578

	524		4,385,878,952			8,369,998			2,191,716,460					4,182,665			1,094,691,544					2,089,106

	528		4,408,629,984			8,349,678			2,203,082,640					4,172,505			1,100,365,728					2,084,026

	600		4,512,402,000			7,520,670			2,254,925,400					3,758,209			1,126,282,800					1,877,138

	688		4,604,578,976			6,692,702			2,300,969,904					3,344,433			1,149,310,880					1,670,510

	744		4,675,830,192			6,284,718			2,336,559,528					3,140,537			1,167,099,408					1,568,682

Table	2. User capacity for several block lengths

2.1.1 Capacity Equations

2.1.1.1 For Each Notch

The next group of equations must be calculated separately for each notch.

ub/ lba

user bytes/ sector (ub/ sct) =

sct/ lba

user sectors/cyl (us/cyl) = (sct/trk)(trk/cyl) - spr/cyl

spares/notch (spr/nch) = (spr/cyl)(ucyl)

Note: Add lcspr to the equation above for the notch closest to the inner diameter (#10).

user sectors/notch (us/nch) = (us/cyl)(ucyl)

Note: Subtract lcspr from the equation above for the notch closest to the inner diameter (#10).

Source filename=SPECS

I B M Corporation

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Contents Form Factor Disk Drive Version BM Corporation Preface Source filename=STSSHEXT When Operating Limits ReliabilityContaminants Acoustic Levels Source filename=STSSHEXT General Features FeaturesInterface Controller Features DescriptionModels Reliability FeaturesGeneral SpecificationsSectors/logical block sct/lba User bytes/sector ub/sctUser bytes/logical block ub/lba Sectors/track sct/trkFor Each Notch Capacity EquationsFor Entire Drive 1 C1x Models Power Requirements by ModelInput Voltage + 5 Volts Supply + 1 2 Volts SupplyExample 3. Power Calculation Power Calculation ExamplesExample 1. Calculate the mean 12 volt average current Example 4. Calculate the 12 volt peak current Things to check when measuring 12 V supply 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 CxB Models Power supply methods4.2 DC/DC Converter Hot plug/unplug support Grounding Requirements of the Disk EnclosureM Corporation Event Nominal Maximum Bring-up Sequence and Stop TimesBring-up Sequence Times and Stop Time for C2x Models Source filename=PERFORM Environment Definition PerformanceWorkload Definition # of segments Ub/lba +Sequential Command Execution TimeRandom Basic Component DescriptionsData Transfer to/from Disk Data Transfer to/from SSA Link CommentsTheoretical Data Sector Transfer Rate Approximating Performance for Different EnvironmentsWhen Write Caching is Enabled When Read Caching is EnabledWhen Adaptive Caching is Enabled When Read-ahead is EnabledFor Queued Commands When No Seek is RequiredReordered Commands Back-To-Back CommandsCylinder to Cylinder Skew SkewTrack to Track Skew Idle Time Functions Servo Bias Measurements Servo Run Out MeasurementsPredictive Failure Analysis Channel CalibrationSave Logs and Pointers Command Timeout LimitsDisk Sweep M Corporation Mechanical Weight and DimensionsSmall 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 E D Locations front view CxB Models M Corporation Electrical Connector and Indicator LocationsElectrical Interface SSA Unitized ConnectorPin Carrier ConnectorRow Option Pins and Indicators SSA Link Electrical CharacteristicsSSA Link Cable Device Fault Pin/Indicator Option Port Pin Device Activity Pin/Indicator Option Port PinWrite Protect Option Port Pin Ground long Option Port PinEarly Power Off Warning or Power Fail Power Port Pin Front Jumper Connector12 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 Seek Error Rate Error DetectionPower On Hours Examples ReliabilityUseful Life Power on/off cyclesMaximum on/off cycles Product LifeMean Time Between Failure *MTBF Install Defect FreeSpql Shipped product quality level Sample Failure Rate ProjectionsConnector Insertion Cycles Periodic MaintenanceInstall Defect Free percentage Percent ESD ProtectionOperating Limits Temperature Measurement PointsP F E T Maximum ReliabilityVibration and Shock Temperature Measurement Points for all Models bottom viewOutput Vibration Limits Drive Mounting GuidelinesOperating Vibration V4S Nonoperating VibrationOperating Shock ContaminantsNonoperating Shock Acoustic Levels Upper Limit Sound Power Requirements Bels for C4x ModelsSource filename=STANDARD Standards SafetyElectromagnetic Compatibility EMC M Corporation Serial Storage Architecture S S a P H Transport Bibliography