Performance characteristics | Seagate ST39205LW/LC, ST318405LW/LC

Cheetah 36XL Product Manual, Rev. E

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4.0Performance characteristics

4.1Internal drive characteristics (transparent to user)

	ST336705	ST318405	ST39205
Drive capacity	36.704	18.352	9.176	GByte (formatted, rounded off values)
Read/write heads	8	4	2
Bytes/track	241,128	241,128	241,128	Bytes (average, rounded off values)
Bytes/surface	4,577.5	4,577.5	4,577.5	Mbytes (unformatted, rounded off values)
Tracks/surface (total)	19,036	19,036	19,036	Tracks (user accessible)
Tracks/inch	24,406	24,406	24,406	TPI
Peak bits/inch	381.28	381.28	381.28	KBPI
Internal data rate	320-490	320-490	320-490	Mbits/sec (variable with zone)
Disc rotational speed	10,022	10,022	10,022	r/min (+0.5%)
Average rotational latency	2.99	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 36XL 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
Average—Typical [2]	5.6	6.4	5.4	6.2
Single Track—Typical [2]	1.0	1.4	0.8	1.2
Full Stroke—Typical [2]	10.7	11.2	10.5	11

4.2.2Format command execution time (minutes) [1]

	ST336705	ST318405	ST39205
Maximum (with verify)	36	18	9
Maximum (no verify)	19	9.5	4.5

4.2.3Generalized performance characteristics

Minimum sector interleave 1 to 1

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

Minimum [3]	31 MByte/sec
Average [3]	43 MByte/sec
Maximum [3]	50 MByte/sec

Data buffer transfer rate to/from disc media (<1 track)

Minimum [3]	29 MByte/sec
Average [3]	40 MByte/sec
Maximum [3]	46 MByte/sec

Image 19

Seagate ST39205LW/LC, ST318405LW/LC, ST336705LW/LC manual Performance characteristics

Contents

Cheetah 36XL Family ST336705LW/LC ST318405LW/LC ST39205LW/LC Page Cheetah 36XL Family ST336705LW/LC ST318405LW/LC ST39205LW/LC Page Revision Date Writer/Engineer Sheets Affected Revision status summary sheetPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support services Cheetah 36XL Product Manual, Rev. E Vii List of FiguresPage Cheetah 36XL family drive ST336705LC shown Scope Cheetah 36XL Product Manual, Rev. E Applicable standards and reference documentation Korean MIC Australian C-TickTaiwanese Bsmi General description Cheetah 36XL family drive Reliability Cheetah 36XL Product Manual, Rev. E Standard featuresMedia characteristics Performance Programmable drive capacity Factory installed accessoriesOptions factory installed Formatted capacities Performance characteristics Start/stop time Ultra2 Scsi Ultra160 ScsiPrefetch/multi-segmented cache control Caching write data Cache operation Prefetch operation Cheetah 36XL Product Manual, Rev. E Cheetah 36XL Product Manual, Rev. E Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service life Controlling S.M.A.R.T 7 S.M.A.R.T Predictive failures Performance impactReporting control Determining rate Invoking DST State of the drive prior to testingDST Failure Definition Implementation Log page entries Product warrantyShort test Function Code 001b Extended test Function Code 010b Product repair and return information Cheetah 36XL Product Manual, Rev. E AC power requirements Physical/electrical specificationsDC power requirements Conducted noise immunity Power sequencing3 12 V Current profile Typical ST336705 drive +12 V current profile Typical ST39205 drive +12 V current profile TypicalST318405 drive +5 V current profile Power dissipation ST336705 Os per Second Cheetah 36XL Product Manual, Rev. E ST318405 ST39205 TemperatureEnvironmental limits Shock Relative humidityEffective altitude sea level Shock and vibration Package size Packaged/product weight Drop height Recommended mounting Vibration Air cleanlinessAcoustics LW mounting configuration dimensions LC mounting configuration dimensions Drive error recovery procedures Defect and error managementDrive internal defects Scsi systems errors Drive ID/option select header InstallationConfigure drive options Formatting Do not install jumpers retain cover J5 jumper header on LW model only J2 option select header Does not apply to LC models Cheetah 36XL Product Manual, Rev. E Function description Grounding Drive orientationCooling Drive mounting Scsi interface messages supported Interface requirements Scsi interface commands supported Cheetah 36XL Product Manual, Rev. E Commands supported by Cheetah 36XL family drive Inquiry Vital Product data Mode Sense data Cheetah 36XL Product Manual, Rev. E Mode Sense Data Cheetah 36XL Product Manual, Rev. E Mode sense data, ST318405 values Bytes Cheetah 36XL Product Manual, Rev. E Mode sense data, ST39205 values Bytes Cheetah 36XL Product Manual, Rev. E Condition/features supported 2 REQ/ACK offset DC cable and connectorPhysical interface Pin Power Scsi interface cable requirements Scsi interface physical description ST336705LC, ST318405LC and ST39205LC Mating connectorsMating connectors for LW model drives Mating connectors for LC model drives Scsi ID Right-angle to Pcba connectors Nonshielded 68 pin Scsi device connector used on LW drives Nonshielded 80 pin Scsi SCA-2 connector, used on LC drives GND +DBP1 Charge 68Cheetah 36XL Product Manual, Rev. E Electrical description Multimode signalsMultimode-SE and LVD alternatives Input characteristics Output characteristics LC drives General cable characteristicsTerminator requirements Terminator power LW drives Low voltage differential I/O circuits Disc drive Scsi timing Drive activity remote LED signal status Cheetah 36XL Product Manual, Rev. E Technical Support Seagate Technology support services Online ServicesAutomated Services Presales Support USA/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 36XL Product Manual, Rev. E Index Symbols Cheetah 36XL Product Manual, Rev. E LED PCB System chassis Page