Seagate ST318418N manual Drive activity LED, Following table provides drive activity LED status

Page 84

74

 

Barracuda 36ES2 Product Manual, Rev. B

Table 17: Disc drive SCSI timing (Continued)

 

 

 

 

 

 

 

 

 

 

Waveform

 

Waveform

 

Description

symbol [1]

 

table [1]

Typical timing

 

 

 

 

 

 

 

 

 

 

Data In Byte Transfer (parameter)

T24

 

4.5-12

0.04 s

 

 

 

 

 

Data Out Byte Transfer (parameter)

T25

 

4.5-13

0.04 s

 

 

 

 

 

Next Data In Byte Access (parameter)

T26

 

4.5-12

0.12 s

 

 

 

 

 

Next Data Out Byte Access (parameter)

T27

 

4.5-13

0.12 s

 

 

 

 

 

Data In Byte Transfer (media) [2]

T28

 

4.5-12

0.04 s

 

 

 

 

 

Data Out Byte Transfer (media) [2]

T29

 

4.5-13

0.04 s

 

 

 

 

 

Next Data In Byte access (media [2]

T30

 

4.5-12

0.12 s

 

 

 

 

 

Next Data Out Byte access (media [2]

T31

 

4.5-13

0.12 s

 

 

 

 

 

MSG IN Byte Transfer

T32

 

4.5-5,7,8,14,15

0.04 s

 

 

 

 

 

MSG OUT Byte Transfer

T33

 

4.5-2

0.04 s

 

 

 

 

 

STATUS Byte Transfer

T34

 

4.5-5,8,15

0.04 s

 

 

 

 

 

Synchronous Data Transfer Characteristics:

 

 

 

 

 

 

 

 

 

Request Signal Transfer Period [3]

 

various (800 ns max)

 

 

 

 

 

Notes.

[1]See the SCSI Interface Product Manual, part number 75789509, timing examples section.

[2]Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual.

[3]Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive is capable of setting periods as given in Section 9.5. See also the Synchronous data transfer section and the Extended messages section of the SCSI Interface Product Manual, for a description of synchronous data transfer operation.

9.11Drive activity LED

The following table provides drive activity LED status.

Table 18: 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 power

N/A

Off due to absence of 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

 

 

 

Image 84
Contents Product Manual, Volume Page Product Manual, Volume Page Revision status summary sheet Revision Date Writer/Engineer Sheets AffectedPage Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Barracuda 36ES2 Product Manual, Rev. B ViiPage Scope Barracuda 36ES2 family drive ST336938LW shownBarracuda 36ES2 Product Manual, Rev. B Applicable standards and reference documentation Australian C-Tick Korean MICTaiwanese Bsmi General description Standard features Media characteristicsPerformance ReliabilityFactory installed accessories Options factory installedProgrammable drive capacity Performance characteristics Ultra2 Scsi Ultra160 Scsi Start/stop timePrefetch/multi-segmented cache control Cache operation Caching write dataPrefetch operation Barracuda 36ES2 Product Manual, Rev. B Reliability specifications Reliability and service Preventive maintenanceService life Service philosophy7 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Reporting controlDetermining rate Predictive failuresState of the drive prior to testing DST Failure DefinitionImplementation Invoking DSTProduct warranty Short test Function Code 001bExtended test Function Code 010b Log page entriesProduct repair and return information Barracuda 36ES2 Product Manual, Rev. B Physical/electrical specifications AC power requirementsDC power requirements Power sequencing Conducted noise immunity3 12 V Current profile +5 Volt Current during spindle start Typical Amper es Amps Power dissipation ST336938/ST318438 Barracuda 36ES2 Product Manual, Rev. B ST336918/ST318418 Temperature Environmental limitsBarracuda 36ES2 Product Manual, Rev. B Relative humidity Effective altitude sea levelShock and vibration ShockRecommended mounting Air cleanliness Barracuda 36ES2 Product Manual, Rev. B VibrationAcoustics Mechanical specifications Dimension TableMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Defect and error management Drive error recovery proceduresDrive internal defects Scsi systems errors Installation Configure drive optionsFormatting Drive ID/option select headerDo not install jumpers retain cover J6 jumper header for N model J5 jumper header on LW models only J2 option select header for LW models Barracuda 36ES2 Product Manual, Rev. B Barracuda 36ES2 Product Manual, Rev. B Function description Drive orientation CoolingAir flow Barracuda 36ES2 Product Manual, Rev. B Drive mounting GroundingBarracuda 36ES2 Product Manual, Rev. B Interface requirements Scsi interface messages supportedScsi interface commands supported Commands supported by Barracuda 36ES2 family drives Barracuda 36ES2 Product Manual, Rev. B Vendor ID Inquiry Vital Product data Unit serial number page 80hImplemented operating definition page 81h Firmware numbers page C0hJumper settings page C2h Mode Sense data DEF CHG Barracuda 36ES2 Product Manual, Rev. B Condition/features supported Supported Status supported DC cable and connector 2 REQ/ACK offsetPhysical interface Model drive physical interface 50-pin Scsi I/O connector Pin Power Scsi interface physical description Scsi interface cable requirementsBarracuda 36ES2 Product Manual, Rev. B Mating connectors Mating connectors for N model drivesScsi daisy chain interface cabling for N drives Nonshielded 68 pin Scsi device connector used on LW drives Scsi daisy chain interface cabling for LW drives GND GND DBP1 +DBP1 Multimode signals Electrical descriptionMultimode-SE and LVD alternatives Input characteristics LVD output signalsTransmitter characteristics Receiver characteristicsSingle-ended drivers/receivers for N models Single-ended drivers/receivers for LW modelsGeneral cable characteristics Low voltage differential I/O circuitsTerminator power Drives Terminator requirementsLW drives Page Drive activity LED Following table provides drive activity LED statusSeagate Technology support services Online Services Automated ServicesPresales Support Technical SupportCustomer Service CSO USA/Canada/Latin America Support ServicesEuropean Support Services Africa/Middle East Support Services Asia/Pacific Support ServicesCall Center Toll-free Direct dial Barracuda 36ES2 Product Manual, Rev. B Index Diffsens LED PCB System chassis Barracuda 36ES2 Product Manual, Rev. B