Amperes | Seagate ST373405LW/LWV/LC/LCV, ST336605LW/LC/LCV manual

Cheetah 73LP Product Manual, Rev. E

25

6.3Power dissipation

ST373405

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 9.9 watts (33.8 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.2 watts (34.8 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 7 and 8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor- responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.

	1.800
	1.600
	1.400
	1.200					17
Amperes	1.000					15
Amperes	0.800					13
	0.600					11
	0.400
	0	50	100	150	200	250

I/Os per Second

5V A

12V A Watts

Watts

Figure 7. ST373405 DC current and power vs. input/output operations per second (SE)

	1.800
	1.600
	1.400
	1.200					17
Amperes	1.000					15
Amperes	0.800					13
	0.600					11
	0.400
	0	50	100	150	200	250

I/Os per Second

5V A

12V A Watts

Watts

Figure 8. ST373405 DC current and power vs. input/output operations per second (LVD)

Image 35

Seagate ST373405LW/LWV/LC/LCV, ST336605LW/LC/LCV manual Amperes

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 services Cheetah 73LP Product Manual, Rev. E Vii List of FiguresPage Cheetah 73LP family drive ST373405LW shown Scope Cheetah 73LP Product Manual, Rev. E Applicable standards and reference documentation Taiwanese Bsmi Australian C-TickKorean MIC General description Cheetah 73LP family drive Reliability Cheetah 73LP Product Manual, Rev. E Standard featuresMedia characteristics Performance Unformatted and formatted capacities Factory installed accessoriesOptions factory installed Accessories user installed Performance characteristics Prefetch/multi-segmented cache control Ultra2 Scsi Ultra3 ScsiStart/stop time Caching write data Cheetah 73LP Product Manual, Rev. E Cache operation Prefetch operation Reliability specifications Service philosophy Reliability and servicePreventive maintenance Service life Controlling S.M.A.R.T 7 S.M.A.R.T Determining rate Performance impactMilliseconds Reporting control Invoking DST State of the drive prior to testingDST Failure Definition Implementation Log page entries Short and extended testsShort test Function Code 001b Extended test Function Code 010b Product repair and return information Cheetah 73LP Product Manual, Rev. E Product warrantyShipping Cheetah 73LP Product Manual, Rev. E DC power requirements Physical/electrical specificationsAC power requirements 3 12 V Current profile Power sequencingConducted noise immunity 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 humidity Shock Shock and vibration Recommended mounting Acoustics Air cleanlinessVibration LW and LWV mounting configuration dimensions LC and LCV mounting configuration dimensions Drive internal defects Defect and error managementDrive error recovery procedures Scsi systems errors Drive ID/option select header InstallationConfigure drive options Formatting Do 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 description Cooling Drive orientation Grounding Cheetah 73LP Product Manual, Rev. E Drive mounting Cheetah 73LP Product Manual, Rev. E Scsi interface messages supported Interface requirements Scsi 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 Physical interface DC cable and connector2 REQ/ACK offset Pin Power Scsi interface cable requirements Scsi interface physical description ST373405LC/LCV and ST336605LC/LCV Mating connectorsMating connectors for LW and LWV model drives Mating connectors for LC and LCV model drives Cheetah 73LP Product Manual, Rev. E Scsi ID Right-angle to Pcba connectors 650±.005 155 100 346 Front View GND +DBP1 62Cheetah 73LP Product Manual, Rev. E REQ +REQ Multimode-SE and LVD alternatives LVD output characteristicsElectrical description Single-ended drivers/receivers General cable characteristics Terminator requirements Cables for low voltage differential drivers/receivers LC and LCV drives Disc drive Scsi timing Drive activity LED Spindle status Command status LED status Cheetah 73LP Product Manual, Rev. E Technical Support Seagate Technology support services Online ServicesAutomated Services Presales Support European Support Services Customer Service CSOUSA/Canada/Latin America Support Services Call Center Toll-free Direct dial Africa/Middle East Support ServicesAsia/Pacific Support Services 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