Seagate ST373405LW/LWV/LC/LCV, ST336605LW/LC/LCV manual Performance characteristics

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Cheetah 73LP Product Manual, Rev. E

9

4.0Performance characteristics

4.1Internal drive characteristics (transparent to user)

	ST373405	ST336605
Drive capacity	73.4	36.7	GByte (formatted, rounded off values)
Read/write heads	8	4
Bytes/track	397,385	397,385	Bytes (average, rounded off values)
Bytes/surface	12,100	12,100	Mbytes (unformatted, rounded off values)
Tracks/surface (total)	29,549	29,549	Tracks (user accessible)
Tracks/inch	38,000	38,000	TPI
Peak bits/inch	474	474	KBPI
Internal data rate	399-671	399-671	Mbits/sec (variable with zone)
Disc rotational speed	10,041	10,041	r/min (+0.5%)
Average rotational latency	2.99	2.99	msec

4.2SCSI performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all models of the Cheetah 73LP family unless otherwise specified. Refer to Section 9.10 and to the SCSI Interface Product Manual, part number 75789509, for additional timing details.

4.2.1Access time [5]

	Including controller overhead		Not including controller overhead
	(without disconnect) [1] [3]		(without disconnect) [1] [3]
	Drive level		Drive level
	Read	Write	Read	Write
	msec		msec
ST373405
Average—Typical [2]	5.3	5.7	5.1	5.5
Single Track—Typical [2]	0.6	0.8	0.4	0.6
Full Stroke—Typical [2]	9.6	10.0	9.4	9.8
ST336605
Average—Typical [2]	4.9	5.4	4.7	5.2
Single Track—Typical [2]	0.6	0.8	0.4	0.6
Full Stroke—Typical [2]	8.8	9.3	8.6	9.1

4.2.2Format command execution time (minutes) [1]

	ST373405	ST336605
Maximum (with verify)	120	90
Maximum (no verify)	60	45

4.2.3Generalized performance characteristics

Minimum sector interleave

1 to 1

Data buffer transfer rate to/from disc media (one 512-byte sector):

Minimum [3]*	38.4	Mbytes/sec
Average [3]	52.0	Mbytes/sec
Maximum [3]	63.9	Mbytes/sec

Image 19

Contents ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support servicesCheetah 73LP Product Manual, Rev. E Vii List of FiguresPage Cheetah 73LP family drive ST373405LW shown ScopeCheetah 73LP Product Manual, Rev. E Applicable standards and reference documentation Korean MIC Australian C-TickTaiwanese Bsmi General description Cheetah 73LP family drive Reliability Cheetah 73LP Product Manual, Rev. E Standard featuresMedia characteristics PerformanceUnformatted and formatted capacities Factory installed accessoriesOptions factory installed Accessories user installedPerformance characteristics Start/stop time Ultra2 Scsi Ultra3 ScsiPrefetch/multi-segmented cache control Caching write data Cheetah 73LP Product Manual, Rev. E Cache operationPrefetch operation Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service lifeControlling S.M.A.R.T 7 S.M.A.R.TDetermining rate Performance impactMilliseconds Reporting controlInvoking DST State of the drive prior to testingDST Failure Definition ImplementationLog page entries Short and extended testsShort test Function Code 001b Extended test Function Code 010bShipping Cheetah 73LP Product Manual, Rev. E Product warrantyProduct repair and return information Cheetah 73LP Product Manual, Rev. E AC power requirements Physical/electrical specificationsDC power requirements Conducted noise immunity Power sequencing3 12 V Current profile Typical ST336605 drive +12 V current profile Typical ST336605 drive +5 V current profile Amperes 000 900 800 700 600 Effective altitude sea level TemperatureCheetah 73LP Product Manual, Rev. E Environmental limits Relative humidityShock Shock and vibrationRecommended mounting Vibration Air cleanlinessAcoustics LW and LWV mounting configuration dimensions LC and LCV mounting configuration dimensions Drive error recovery procedures Defect and error managementDrive internal defects Scsi systems errors Drive ID/option select header InstallationConfigure drive options FormattingDo not install jumpers retain cover J5 jumper header on LW/LWV models only J2 option select header Does not apply to LC/LCV model Cheetah 73LP Product Manual, Rev. E Function descriptionCooling Drive orientationGrounding Cheetah 73LP Product Manual, Rev. E Drive mountingCheetah 73LP Product Manual, Rev. E Scsi interface messages supported Interface requirementsScsi interface commands supported Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Inquiry Vital Product data Mode Sense data DEF CHG Cheetah 73LP Product Manual, Rev. E Condition/feature supported by 2 REQ/ACK offset DC cable and connectorPhysical interface Pin Power Scsi interface cable requirements Scsi interface physical descriptionST373405LC/LCV and ST336605LC/LCV Mating connectorsMating connectors for LW and LWV model drives Mating connectors for LC and LCV model drivesCheetah 73LP Product Manual, Rev. E Scsi ID Right-angle to Pcba connectors650±.005 155 100 346 Front View GND +DBP1 62Cheetah 73LP Product Manual, Rev. E REQ +REQ Electrical description LVD output characteristicsMultimode-SE and LVD alternatives Single-ended drivers/receivers General cable characteristicsTerminator requirements Cables for low voltage differential drivers/receiversLC and LCV drives Disc drive Scsi timing Drive activity LED Spindle status Command status LED statusCheetah 73LP Product Manual, Rev. E Technical Support Seagate Technology support services Online ServicesAutomated Services Presales SupportUSA/Canada/Latin America Support Services Customer Service CSOEuropean Support Services Asia/Pacific Support Services Africa/Middle East Support ServicesCall Center Toll-free Direct dial Cheetah 73LP Product Manual, Rev. E Index Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Scam Scsi Scsi ID 80Cheetah 73LP Product Manual, Rev. E