Seagate ST3146855LW, ST3146855LC, ST3300655LW, ST3300655LC, ST373455LC manual Disc drive Scsi timing

Page 78

10.10Disc drive SCSI timing

Table 24: Disc drive SCSI timing

These values are not current Cheetah 15K.5 SCSI values, but are listed for information only.

 

Waveform

Waveform

 

Description

symbol [1]

table [1]

Typical timing

 

 

 

 

Target Select Time (no Arbitration)

T00

N/A

<1 μs

Target Select Time (with Arbitration)

T01

4.5-1,2

1.93 μs

Target Select to Command

T02

4.5-1

3.77 μs

Target Select to MSG Out

T03

4.5-2

1.57 μs

Identify MSG to Command

T04

4.5-3

3.36 μs

Command to Status

T05

4.5-5

Command Depen-

 

 

 

dent

Command to Data (para. In)

T06

4.5-9

Command Depen-

 

 

 

dent

Command to Data (para. Out)

T07

4.5-10

Command Depen-

 

 

 

dent

Command to Data (Write to Data Buffer)

T08

4.5-10

Command Depen-

 

 

 

dent

Command to Disconnect MSG

T09

4.5-6

Command Depen-

 

 

 

dent

Disconnect MSG to Bus Free

T10

4.5-6,14

0.52 μs

Disconnect to Arbitration (for Reselect)

T11

4.5-6

Command Depen-

This measures disconnected CMD over-

 

 

dent

head

 

 

 

Target win Arbitration (for Reselect)

T12

4.5-7

3.00 μs

Arbitration to Reselect

T13

4.5-7

1.60 μs

Reselect to Identify MSG In

T14

4.5-7

1.39 μs

Reselect Identify MSG to Status

T15

4.5-8

Command Depen-

 

 

 

dent

Reselect Identify MSG to Data (media)

T16

4.5-11

Command Depen-

 

 

 

dent

Data to Status

T17

4.5-15

Command Depen-

 

 

 

dent

Status to Command Complete MSG

T18

4.5-5,8,15

0.98 μs

Command Complete MSG to Bus Free

T19

4.5-5,8,15

0.51 μs

Data to Save Data Pointer MSG

T20

4.5-14

4.00 μs

Save Data Pointer MSG to Disconnect MSG

T21

4.5-14

0.79 μs

Command Byte Transfer

T22

4.5-4

0.04 μs

Next Command Byte Access:

 

4.5-4

 

Next CDB Byte Access (Byte 2 of 6)

T23.6.2

4.5-4

0.58 μs

Next CDB Byte Access (Byte 3 of 6)

T23.6.3

4.5-4

0.12 μs

Next CDB Byte Access (Byte 4 of 6)

T23.6.4

4.5-4

0.12 μs

Next CDB Byte Access (Byte 5 of 6)

T23.6.5

4.5-4

0.12 μs

Next CDB Byte Access (Byte 6 of 6)

T23.6.6

4.5-4

0.12 μs

72

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

Page 77 Page 79
Image 78
Page 77 Page 79
Contents Cheetah 15K.5 Scsi Page Contents Defect and error management InstallationInterface requirements List of Figures Page Seagate Technology support services Seagate Online Support and ServicesScope Electromagnetic compatibility Applicable standards and reference documentationStandards Electromagnetic susceptibilityElectromagnetic compliance European Union Restriction of Hazardous Substances RoHSReference documents Drive model number vs. differentiating features General descriptionStandard features Media characteristicsPerformance ReliabilityFormatted capacities Accessories Factory installed accessoriesOptions factory installed Programmable drive capacityPerformance characteristics Internal drive characteristics transparent to userScsi performance characteristics visible to user Format command execution time minutes Generalized performance characteristicsSeek time Start/stop time Prefetch/multi-segmented cache controlCache operation Caching write data Prefetch operationRecoverable Errors Reliability specificationsError rates Unrecoverable ErrorReliability and service Seek errorsPreventive maintenance Hot plugging Cheetah 15K.5 Scsi disc drives 4 S.M.A.R.TMilliseconds Controlling S.M.A.R.TPerformance impact Reporting controlTemperature Log page 0Dh Parameter Code Description Thermal monitorDrive Self Test DST Implementation State of the drive prior to testingDST Failure Definition Invoking DSTExtended test Function Code 010b Product warrantyShort test Function Code 001b Log page entriesShipping Product repair and return informationDC power requirements Physical/electrical specificationsAC power requirements ST3300655LC DC power requirementsST3146855LC DC power requirements ST373455LC DC power requirementsPower sequencing Conducted noise immunityCurrent profile 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/ST373455LCRelative humidity Temperature a. OperatingEnvironmental limits Effective altitude sea level a. OperatingShock and vibration ShockRecommended mounting Air cleanliness Vibration a. Operating-normalCorrosive environment Mechanical specifications AcousticsLC mounting configuration dimensions Defect and error management Drive error recovery proceduresDrive internal defects Read and write retry count maximum recovery times Scsi systems errors Background Media ScanMedia Pre-Scan Deferred Auto-Reallocation Idle Read After WriteDrive ID/option select header InstallationConfigure drive options FormattingJ5 jumper header on LW models only Drive Front Function description RESDrive orientation CoolingDrive mounting GroundingScsi interface messages supported Interface requirementsGeneral description 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 Scsi interface cable requirements Mating connectorsInterface transfer rates supported 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 4LVD output characteristics Electrical descriptionMultimode-SE and LVD alternatives Cable characteristics for single-ended circuits LVD Input characteristicsGeneral cable characteristics Single-ended drivers/receiversCables for low voltage differential drivers/receivers Twist-n-flat cables-into a multi-drive backplaneTerminator requirements Terminator power LW drivesLC 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
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