Seagate ST3300655LC, ST3146855LC manual Drive activity LED status Spindle status Command status

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10.11Drive activity LED

The following table provides drive activity LED status.

Table 25: Drive activity LED status

Spindle status	Command status	LED status

Spinning up with DC power applied	N/A	On until spinup is complete

Spun down	Start Unit	On while processing the command

Powered down by removal of DC	N/A	Off due to absence of power
power
Spun up	Stop Unit	On while processing the command

Spun down	No command activity	Off

Spun down	Write/Read Buffer	On while processing the command

Spun down	SCSI Bus Reset	On while processing the reset

Spun down	Test Unit Ready	On while processing the command

Spun up	No command activity	Off

Spun up	Write/Read	On while processing the command

Spun up	SCSI Bus Reset	On while processing the reset

Spun up	Test Unit Ready	On while processing the command

Spun up	Format with Immediate option on	On while the command is initially processed

Spun up	Format without Immediate	LED toggles on/off on each cylinder boundary

Spun up	Write Same Command in prog-	Toggles on/off
	ress

74	Cheetah 15K.5 SCSI Product Manual, Rev. J

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Contents Cheetah 15K.5 Scsi Page Contents Interface requirements Defect and error managementInstallation List of Figures Page Seagate Technology support services Seagate Online Support and ServicesScope Applicable standards and reference documentation StandardsElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance European Union Restriction of Hazardous Substances RoHSReference documents Drive model number vs. differentiating features General descriptionStandard features Media characteristicsFormatted capacities PerformanceReliability Factory installed accessories Options factory installedAccessories Programmable drive capacityScsi performance characteristics visible to user Performance characteristicsInternal drive characteristics transparent to user Seek time Format command execution time minutesGeneralized performance characteristics Cache operation Start/stop timePrefetch/multi-segmented cache control Caching write data Prefetch operationReliability specifications Error ratesRecoverable Errors Unrecoverable ErrorPreventive maintenance Reliability and serviceSeek errors Hot plugging Cheetah 15K.5 Scsi disc drives 4 S.M.A.R.TControlling S.M.A.R.T Performance impactMilliseconds Reporting controlDrive Self Test DST Temperature Log page 0Dh Parameter Code DescriptionThermal monitor State of the drive prior to testing DST Failure DefinitionImplementation Invoking DSTProduct warranty Short test Function Code 001bExtended test Function Code 010b Log page entriesShipping Product repair and return informationPhysical/electrical specifications AC power requirementsDC power requirements ST3300655LC DC power requirementsST3146855LC DC power requirements ST373455LC DC power requirementsCurrent profile Power sequencingConducted noise immunity Typical ST3300655LW drive +12V LVD current profile Power dissipation ST3300655LW/ST3300655LCST3146855LC DC current and power vs. Iops LVD ST3146855LW/ST3146855LCST373455LC DC current and power vs. Iops LVD ST373455LW/ST373455LCTemperature a. Operating Environmental limitsRelative humidity Effective altitude sea level a. OperatingShock and vibration ShockRecommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal Mechanical specifications AcousticsLC mounting configuration dimensions Drive internal defects Defect and error managementDrive error recovery procedures Read and write retry count maximum recovery times Media Pre-Scan Scsi systems errorsBackground Media Scan Deferred Auto-Reallocation Idle Read After WriteInstallation Configure drive optionsDrive ID/option select header FormattingJ5 jumper header on LW models only Drive Front Function description RESDrive orientation CoolingDrive mounting GroundingInterface requirements General descriptionScsi interface messages supported Scsi messages supported by Cheetah 15K.5 Scsi family drivesScsi interface commands supported Commands supported by Cheetah 15K.5 Scsi family driveCommands supported by Cheetah 15K.5 Scsi family drive Commands supported by Cheetah 15K.5 Scsi family drive Commands supported by Cheetah 15K.5 Scsi family drive Cheetah 15K.5 Scsi family drive Standard Inquiry data Inquiry Vital Product dataMode Sense data ST3300655 Mode sense data Mode Sense Pages DataST3146855 Mode sense data Mode Sense Header Data Mode Sense Pages DataST373455 Mode sense data Scsi bus conditions and miscellaneous features supported Scsi bus conditions and other miscellaneous featuresSynchronous data transfer Physical interfaceDC cable and connector Scsi interface physical description Mating connectors Interface transfer rates supportedScsi interface cable requirements Cable requirementsMating connectors for LW model drives Mating connectors for LC model drivesRight-angle to Pcba connectors Scsi daisy-chain interface cabling for LW drivesNonshielded 68-pin Scsi device connector used on LW drives Nonshielded 80-pin Scsi SCA-2 connector used on LC drives GND LW 68-conductor LVD P cable signal/pin assignments LC 80-pin single-ended SE I/O connector pin assignments Active LED OUT 4LC 80-pin single-ended LVD I/O connector pin assignments +5 V Charge GND Active LED OUT 4Multimode-SE and LVD alternatives LVD output characteristicsElectrical description LVD Input characteristics General cable characteristicsCable characteristics for single-ended circuits Single-ended drivers/receiversCables for low voltage differential drivers/receivers Twist-n-flat cables-into a multi-drive backplaneLC drives Terminator requirements Terminator powerLW drives Disc drive Scsi timing Disc drive Scsi timingDisc drive Scsi timing Drive activity LED status Spindle status Command status Drive activity LEDSymbols NumericsPage Page Scsi Page Page