Seagate ST318418N, ST318438LW, ST336938LW, ST336918N manual Scsi systems errors

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Barracuda 36ES2 Product Manual, Rev. B

Table 3: Read and write retry count maximum recovery times [1]

Read retry

Maximum recovery time per

count [1]

LBA (cumulative, msec)

 

 

 

 

0

108.29

 

 

1

124.95

 

 

2

424.83

 

 

3

458.15

 

 

4

516.46

 

 

5

583.10

 

 

6

741.37

 

 

7

857.99

 

 

8

891.31

 

 

9

966.28

 

 

10

1049.58

 

 

11 (default)

2782.22

 

 

Write retry

Maximum recovery time per

count

LBA (cumulative, msec)

 

 

 

 

0

91.63

 

 

1

116.62

 

 

2

141.61

 

 

3

166.60

 

 

4

224.91

 

 

5

283.22

 

 

6

449.82

 

 

7

474.81

 

 

8

516.46

 

 

9

541.45

 

 

10

2640.61

 

 

11

2665.60

 

 

12

2690.59

 

 

13

2715.58

 

 

14

2773.89

 

 

15 (default)

2832.20

 

 

[1]These values are subject to change.

Setting these retry counts to a value below the default setting could result in an increased unrecovered error rate which may exceed the value given in this product manual. A setting of zero (0) will result in the drive not performing error recovery.

For example, suppose the Read/Write Recovery page has the RC bit set to 0, read retry count set to 4, and the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to FF FF hex (maximum). A four LBA Read command is allowed to take up to 516.46 msec recovery time for each of the four LBAs in the command. If the recovery time limit is set to 00 C8 hex (200 msec decimal) a four LBA read command is allowed to take up to 200 msec for all error recovery within that command. The use of the Recovery Time Limit field allows finer granularity on control of the time spent in error recovery. The recovery time limit only starts counting when the drive is executing error recovery and it restarts on each command. Therefore, each command’s total recovery time is subject to the recovery time limit. Note: A recovery time limit of 0 will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the Recovery Time Limit field to 00 01.

7.3SCSI systems errors

Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface Product Manual, part number 75789509. Message Protocol System is described in the SCSI Interface Product Manual. Several of the messages are used in the SCSI systems error management system. The Request Sense command returns information to the host about numerous kinds of errors or faults. The Receive Diag- nostic Results reports the results of diagnostic operations performed by the drive.

Status returned by the drive to the Initiator is described in the SCSI Interface Product Manual. Status reporting plays a role in the SCSI systems error management and its use in that respect is described in sections where the various commands are discussed.

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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 Taiwanese Bsmi Australian C-TickKorean MIC General description Standard features Media characteristicsPerformance ReliabilityProgrammable drive capacity Factory installed accessoriesOptions factory installed Performance characteristics Prefetch/multi-segmented cache control Ultra2 Scsi Ultra160 ScsiStart/stop time 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 DC power requirements Physical/electrical specificationsAC power requirements 3 12 V Current profile Power sequencingConducted noise immunity +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 Acoustics Air cleanlinessBarracuda 36ES2 Product Manual, Rev. B Vibration Mechanical specifications Dimension TableMounting configuration dimensions Barracuda 36ES2 Product Manual, Rev. B Drive internal defects Defect and error managementDrive error recovery procedures 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 Air flow Drive orientationCooling 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 Physical interface DC cable and connector2 REQ/ACK offset 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-SE and LVD alternatives Multimode signalsElectrical description 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 circuitsLW drives Terminator power DrivesTerminator requirements Page Drive activity LED Following table provides drive activity LED statusSeagate Technology support services Online Services Automated ServicesPresales Support Technical SupportEuropean Support Services Customer Service CSOUSA/Canada/Latin America Support Services Call Center Toll-free Direct dial Africa/Middle East Support ServicesAsia/Pacific Support Services Barracuda 36ES2 Product Manual, Rev. B Index Diffsens LED PCB System chassis Barracuda 36ES2 Product Manual, Rev. B
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