IBM C1B 1.12 Brick On Sled Carrier 128-pin HPC, SSA manual Mean Time Between Failure *MTBF

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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

6.7 Mean Time Between Failure (MTBF)

The mean time to failure target is 1,000,000 device hours per fail (3.0% C D F ) based on the following assumptions:

6000 power on hours per year (500 power on hours per month times 12 months)

300 average on/off cycles per year (25 power cycles per month times 12 months) Seeking/Reading/Writing is assumed to be 20% of power on hours (Approximately 10 read/write oper- ations per second)

Operating at or below the Reliability temperature specifications (See Table 15 on page 78) and nominal voltages (See 2.2, “Power Requirements by Model” onpage 15)

Note: * M T B F - is a measure of the failure characteristics over total product life. * M T B F includes normal integration induced, installation, early life (latent), and intrinsic failures. * M T B F is predicated on supplier qualification, product design verification test, and field performance data.

6.7.1 Sample Failure Rate Projections

The following tables are for reference only. The tables contain failure rate projections for a given set of user conditions. Similar projections will be provided, upon request, for each user specific power on hour and power cycles per month condition. Contact your IBM customer representative for a customized projection.

Application	Electronics only -		(RA/MM)

	1st 30 days	1st 60	days	1st 90 days	30 day average over life	CDF

500POH/MM	0.00120		0.0010	0.00096	0.00036	2.1%

730POH/MM	0.00160		0.00140	0.00125	0.00047	2.8%

Table 13. Projected failure rates for the electronics only.

Application	Electronics and HDA - (RA/MM)

	1st 30 days	1st 60 days		1st 90 days	30 day average over life	CDF

500POH/MM	0.00150	0.00130		0.00120	0.00050	3.0%

730POH/MM	0.00200	0.00170		0.00160	0.00070	4.1%

Table 14. Projected failure rates for the entire drive.			(Electronics and HDA).

6.8 SPQL (Shipped product quality level)

	LA vintage	Ultimate (13th month)
Targets	.25%	.10%

6.9 Install Defect Free

Source filename=POH

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 Description FeaturesGeneral Features Interface Controller FeaturesModels Reliability FeaturesGeneral SpecificationsSectors/track sct/trk User bytes/sector ub/sctSectors/logical block sct/lba User bytes/logical block ub/lbaFor Each Notch Capacity EquationsFor Entire Drive + 1 2 Volts Supply Power Requirements by Model1 C1x Models Input Voltage + 5 Volts SupplyPower Calculation Examples Example 3. Power CalculationExample 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 Power supply methods CxB Models4.2 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 # of segments Ub/lba + PerformanceEnvironment Definition Workload DefinitionBasic Component Descriptions Command Execution TimeSequential RandomData Transfer to/from Disk Data Transfer to/from SSA Link CommentsTheoretical Data Sector Transfer Rate Approximating Performance for Different EnvironmentsWhen Read-ahead is Enabled When Read Caching is EnabledWhen Write Caching is Enabled When Adaptive Caching is EnabledBack-To-Back Commands When No Seek is RequiredFor Queued Commands Reordered CommandsSkew Cylinder to Cylinder SkewTrack to Track Skew Idle Time Functions Channel Calibration Servo Run Out MeasurementsServo Bias Measurements Predictive Failure AnalysisCommand Timeout Limits Save Logs and PointersDisk Sweep M Corporation Clearances Weight and DimensionsMechanical Small Form Factor Models CxCDimensions 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 SSA Link Electrical Characteristics Option Pins and IndicatorsSSA Link Cable Ground long Option Port Pin Device Activity Pin/Indicator Option Port PinDevice Fault Pin/Indicator Option Port Pin Write Protect Option Port PinProgrammable pin 1 Option Port Pin Front Jumper ConnectorEarly Power Off Warning or Power Fail Power Port Pin 12 12V Charge and 5V Charge Power Port pin 1Spindle Synchronization Over Sync Hard-wire M Corporation Source filename=RELIABLE Reliability Error DetectionSeek Error Rate Power On Hours ExamplesProduct Life Power on/off cyclesUseful Life Maximum on/off cyclesSample Failure Rate Projections Install Defect FreeMean Time Between Failure *MTBF Spql Shipped product quality levelESD Protection Periodic MaintenanceConnector Insertion Cycles Install Defect Free percentage PercentOperating Limits Temperature Measurement PointsP F E T Maximum ReliabilityVibration and Shock Temperature Measurement Points for all Models bottom viewDrive Mounting Guidelines Output Vibration LimitsOperating Vibration V4S Nonoperating VibrationContaminants Operating ShockNonoperating Shock Acoustic Levels Upper Limit Sound Power Requirements Bels for C4x ModelsSource filename=STANDARD Safety StandardsElectromagnetic Compatibility EMC M Corporation Serial Storage Architecture S S a P H Transport Bibliography