Seagate ST3146954FC, ST373554FC Start/stop time, Prefetch/multi-segmented cache control, 4.2.3

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4.2.2Format command execution time (minutes)

		ST3146954FC	ST373554FC	ST336854FC
Maximum (with verify)		90	60	30
Maximum (without verify)		45	30	15
4.2.3	General performance characteristics
Data buffer to/from disc media (one 512-byte logical block)*
Minimum				685 Mbits/sec
Maximum				1,142 Mbits/sec
Fibre Channel Interface maximum instantaneous transfer rate				200 Mbytes/sec* per port
				(dual port = 400 Mbytes/sec*)
Logical block sizes
Default is 512-byte data blocks
Variable 512 to 704 bytes per sector in even number of bytes per
sector. If n (number of bytes per sector) is odd, then n-1 will be used.
Read/write consecutive sectors on a track				Yes
Flaw reallocation performance impact (for flaws reallocated at format time				Negligible
using the spare sectors per sparing zone reallocation scheme.)
Average rotational latency				2.0 msec

*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.

4.3Start/stop time

If the Motor Start option is disabled, the drive becomes ready within 20 seconds after DC power is applied. If a recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and the time to become ready may exceed 20 seconds. Stop time is 30 seconds (maximum) from removal of DC power.

If the Motor Start option is enabled, the internal controller accepts the commands listed in the Fibre Channel Interface Manual less than 3 seconds after DC power has been applied. After the Motor Start command has been received, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure). The Motor Start command can also be used to command the drive to stop the spindle.

There is no power control switch on the drive.

4.4Prefetch/multi-segmented cache control

The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the host sends the Mode Select command with the proper values in

12	Cheetah 15K.4 FC Product Manual, Rev. B

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Contents Cheetah 15K.4 FC ST3146954FC ST373554FC ST336854FCPage Cheetah 15K.4 FC March Revision status summary sheet Rev. A07/15/05 Rev. B DraftPage Contents 4.0 Performance characteristics5.0 Reliability specifications 6.0 Physical/electrical specifications7.0 Defect and error management 8.0 Installation9.0 Interface requirements 10.0 Seagate Technology support services Cheetah 15K.4 FC Product Manual, Rev. B List of Figures Page 1.0 Scope Figure 1. Cheetah 15K.4 FC family disc driveCheetah 15K.4 FC Product Manual, Rev. B 2.0 Applicable standards and reference documentation 2.1 Standards2.1.1 Electromagnetic compatibility 2.1.1.1 Electromagnetic susceptibility2.1.2 Electromagnetic compliance Electromagnetic compliance for the European UnionAustralian C-Tick Korean MICSpecification for Acoustic Test Requirement and Procedures 2.2 Reference documentsFibre Channel Interface Manual Cheetah 15K.4 FC Product Manual, Rev. B 3.0 General description 3.1 Standard features 3.2 Media description3.3 Performance 3.4 Reliability3.5 Formatted capacities 3.5.1 Programmable drive capacity3.6 Factory-installed accessories 3.7 Factory-installed options3.8 User-installed accessories 4.0 Performance characteristics 4.1 Internal drive characteristics4.2 Seek performance characteristics 4.2.1 Access time4.2.2 Format command execution time minutes General performance characteristics4.3 Start/stop time 4.4 Prefetch/multi-segmented cache control4.5 Cache operation 4.5.1 Caching write data 4.5.2 Prefetch operationCheetah 15K.4 FC Product Manual, Rev. B Cheetah 15K.4 FC Product Manual, Rev. B 5.0 Reliability specifications 5.1 Error rates5.1.1 Recoverable Errors 5.1.2 Unrecoverable Errors5.2 Reliability and service 5.1.3 Seek errors5.1.4 Interface errors 5.2.2 Preventive maintenance5.2.3 Hot plugging the drive 5.2.4 S.M.A.R.TControlling S.M.A.R.T Fully-enabled delay Performance impactMaximum processing delay On-line only delayParameter Code Description5.2.6 Drive Self Test DST 5.2.6.1 DST failure definition5.2.6.2.1 State of the drive prior to testing 5.2.6.2 Implementation5.2.6.2.2 Invoking DST 5.2.6.2.3 Short and extended tests5.2.7 Product warranty 5.2.6.2.4 Log page entries5.2.6.2.5 Abort ShippingProduct repair and return information 6.0 Physical/electrical specifications 6.1 AC power requirements6.2 DC power requirements 3 See +12V current profile in Figure General DC power requirement notes 6.2.2 Power sequencing6.2.1 Conducted noise immunity 6.2.3 Current profilesFigure 2. Typical ST3146954FC drive, 2 Gbit, +12V current profile Figure 3. Typical ST3146954FC drive, 2 Gbit, +5V current profileFigure 4. Typical ST373554FC drive +12V current profile Figure 5. Typical ST373554FC drive +5V current profileFigure 6. Typical ST336854FC drive +12V current profile Figure 7. Typical ST336854FC drive +5V current profile6.3 Power dissipation ST3146954FCST373554FC Power wattsST336854FC 6.4 Environmental limits 6.4.1 Temperature a. Operating6.4.2 Relative humidity 6.4.3 Effective altitude sea level a. Operating 6.4.4 Shock and vibration6.4.4.1 Shock Packaged/product weight Package sizeDrop height Figure 12. Recommended mounting6.4.5 Air cleanliness 6.4.4.2 Vibration a. Operating-normal6.4.6 Acoustics 6.4.7 Electromagnetic susceptibility6.5 Mechanical specifications Figure 13. Mounting configuration dimensions7.0 Defect and error management 7.1 Drive internal defects/errors7.2 Drive error recovery procedures Cheetah 15K.4 FC Product Manual, Rev. B 7.3 FC-AL system errors 7.4 Background Media Scan 7.4.1 Media Pre-Scan8.0 Installation 8.1 Drive ID/option selection8.2 LED connections Figure 15. LED indicator connectorFigure 14. Physical interface 8.2.1 J6 connector requirements 8.3 Drive orientation8.4 Cooling 8.5 Drive mounting 8.6 GroundingK x X = F 15lb = 67N 9.1 FC-AL features 9.1.1 Fibre Channel link service frames9.0 Interface requirements 9.1.2 Fibre Channel task management functions 9.1.3 Fibre Channel task management responsesFibre Channel SCSI FCP task management functions Task name9.1.4 Fibre Channel port login NPort login PLOGI payloadBytes 9.1.5 Fibre Channel port login accept 9.1.6 Fibre Channel Process LoginNPort Login Accept ACC payload Process Login PLRI payload9.1.7 Fibre Channel Process Login Accept 9.1.8 Fibre Channel fabric loginProcess Login Accept ACC payload Fabric Login FLOGI payload9.1.9 Fibre Channel fabric accept login Fabric Login Accept ACC payload9.2 Dual port support 9.1.10 Fibre Channel Arbitrated Loop options9.3 SCSI commands supported Table 16 Supported commandsCommand code Command nameTable 16 Supported commands continued Table 16 Supported commands continued 3 Reference Mode Sense command 1Ah for mode pages supported 9.3.1 Inquiry data 9.3.2 Mode Sense dataCHG = Changeable bits indicates if default value is changeable 3. Current values4. Changeable values Definitions SAV = Current saved valueMODE SENSE 10 BYTE HEADER DATA Cheetah 15K.4 FC Product Manual, Rev. B Cheetah 15K.4 FC Product Manual, Rev. B 9.4 Miscellaneous operating features and conditions Miscellaneous featuresFeature or condition Miscellaneous status9.5.1 Physical characteristics 9.5 FC-AL physical interface9.5.1.1 Physical description 9.5.2 Connector requirements FeaturesFC-AL SCA device connector dimensions Figure 20. J6 connector dimensions9.5.3 Electrical description 9.5.4 Pin descriptions9.5.6 Power 9.5.7 Fault LED Out9.5.5 FC-AL transmitters and receivers Figure 21. FC-AL transmitters and receivers9.5.9 Enable port bypass signals 9.5.8 Active LED Out9.5.10 Motor start controls Normal command activity9.5.11.1 Parallel Enclosure Services Interface ESI 9.5.11 SEL6 through SEL0 ID linesSetting Arbitrated loop physical address ALPA valuesALPA SEL ID9.6 Signal characteristics TTL input characteristics9.5.12 Device control codes 9.6.19.6.2 LED driver signals 9.6.3 FC Differential output9.6.4 FC Differential input Bit Time Vout mv XMIT EyeReceive eye diagram Eye diagram data valuesVin mv 941 ps 659 ps 376 psCheetah 15K.4 FC Product Manual, Rev. B 10.0 Seagate Technology support services Online servicesSeagate Service Centers InternetCustomer Service Operations USA/Canada/Latin America support services Seagate Service CentersWarranty Service Data Recovery ServicesEuropean support services Africa/Middle East support servicesFAX services-All Europe toll call Warranty ServiceAsia/Pacific support services Index NumericsDownload microcode with offsets and save mode 7 front panel 38 FS 49, 50, 52 function mounting 46 holes 46 orientations NN 49pin descriptions 66 PN 49 Self-Monitoring Analysis and Reporting Technology 9 SMP = 1 in Mode Select command 63 SO 49 LED driver 72 single-unit shipping pack kit 10 SMART 9UI 50, 51 unformatted Page Seagate Technology LLC