User manual MAXTOR ST373405 VOLUME 1

[. . . ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST373405LW/LWV/LC/LCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST336605LW/LC/LCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cheetah 73LP Family: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST373405LW/LWV/LC/LCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ST336605LW/LC/LCV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Manual, Volume 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . © 2002 Seagate Technology LLC All rights reserved Publication number: 100109943, Rev. E May 2002 Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC. [. . . ] For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8. 9 watts (30. 4 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 corresponding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3. 4123. 1. 000 0. 900 0. 800 0. 700 0. 600 Amperes 14 13 12 11 10 9 8 5V A 12V A Watts 0. 500 0. 400 0. 300 0. 200 0. 100 0. 000 0 50 100 150 200 Watts 250 I/Os per Second Figure 9. input/output operations per second (SE) 1. 800 1. 600 1. 400 1. 200 Amperes 5V A 12V A Watts 17 15 13 11 1. 000 0. 800 0. 600 0. 400 0 50 100 150 200 I/Os per Second Watts Figure 10. ST336605 DC current and power vs. input/output operations per second (LVD) Cheetah 73LP Product Manual, Rev. E 6. 4 Environmental limits 27 Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58. 7°F (14. 8°C). Maximum wet bulb temperature is 82°F (28°C). Operating With cooling designed to maintain the case temperature, the drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that the temperatures are not exceeded. Air flow may be needed to achieve these temperature values (see Section 8. 3). Operation at temperatures above these values may adversely affect the drives ability to meet specifications. The MTBF specification for the drive is based on operating in an environment that ensures that the case temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F (55°C) or 41°F (5°C) may occur without impact to the specified MTBF. Air flow may be needed to achieve these temperatures. Continual or sustained operation at case temperatures above these values may degrade MTBF. The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122°F (50°C). To confirm that the required cooling for the HDA is provided, place the drive in its final mechanical configuration, perform random write/read operations. After the temperatures stabilize, measure the case temperature. The maximum allowable HDA case temperature is 140°F (60°C). Operation of the drive at the maximum case temperature is intended for short time periods only. [. . . ] SeaTDDTM (+1-405-936-1687) is a telecommunications device for the deaf (TDD). You can send questions or comments 24 hours daily and exchange messages with a technical support specialist from 8:00 A. M. (central time) Monday through Friday. 72 Cheetah 73LP Product Manual, Rev. E Customer Service (CSO) Warranty Service Seagate offers worldwide customer support for Seagate drives. [. . . ]